./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix020.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/mix020.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/mix020.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix020.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 [2024-06-03 19:24:24,252 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:24:24,324 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:24:24,327 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:24:24,327 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:24:24,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:24:24,353 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:24:24,354 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:24:24,354 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:24:24,357 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:24:24,357 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:24:24,358 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:24:24,358 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:24:24,359 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:24:24,359 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:24:24,360 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:24:24,360 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:24:24,360 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:24:24,360 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:24:24,360 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:24:24,361 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:24:24,361 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:24:24,361 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:24:24,361 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:24:24,362 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:24:24,362 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:24:24,362 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:24:24,362 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:24:24,363 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:24:24,363 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:24:24,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:24:24,364 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:24:24,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:24:24,364 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:24:24,364 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:24:24,365 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:24:24,365 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:24:24,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:24:24,365 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:24:24,366 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:24:24,366 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:24:24,366 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:24:24,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:24:24,366 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:24:24,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:24:24,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:24:24,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:24:24,547 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:24:24,548 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:24:24,548 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix020.opt.i [2024-06-03 19:24:25,570 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:24:25,775 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:24:25,776 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix020.opt.i [2024-06-03 19:24:25,791 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80e6742a2/fb351e5f3e6f4f3eb864b6d185087a38/FLAG3fe6f6ee9 [2024-06-03 19:24:25,802 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80e6742a2/fb351e5f3e6f4f3eb864b6d185087a38 [2024-06-03 19:24:25,804 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:24:25,804 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:24:25,805 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix020.opt.yml/witness.yml [2024-06-03 19:24:25,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:24:25,968 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:24:25,970 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:24:25,971 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:24:25,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:24:25,976 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:24:25" (1/2) ... [2024-06-03 19:24:25,977 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676a2163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:25, skipping insertion in model container [2024-06-03 19:24:25,977 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:24:25" (1/2) ... [2024-06-03 19:24:25,978 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3cc3b52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:25, skipping insertion in model container [2024-06-03 19:24:25,979 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:24:25" (2/2) ... [2024-06-03 19:24:25,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676a2163 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:25, skipping insertion in model container [2024-06-03 19:24:25,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:24:25" (2/2) ... [2024-06-03 19:24:25,980 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:24:26,081 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:24:26,082 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 <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-03 19:24:26,082 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ((((((((((((((((((((((! multithreaded || z$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$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-03 19:24:26,082 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 <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-03 19:24:26,082 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((! multithreaded || z$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$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-03 19:24:26,082 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:24:26,082 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-03 19:24:26,122 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:24:26,434 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:24:26,443 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:24:26,557 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:24:26,590 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:24:26,591 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26 WrapperNode [2024-06-03 19:24:26,591 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:24:26,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:24:26,592 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:24:26,592 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:24:26,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,640 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 161 [2024-06-03 19:24:26,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:24:26,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:24:26,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:24:26,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:24:26,653 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,655 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,672 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]. [2024-06-03 19:24:26,672 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,672 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,680 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,681 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,683 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,687 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:24:26,687 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:24:26,688 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:24:26,688 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:24:26,688 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (1/1) ... [2024-06-03 19:24:26,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:24:26,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:24:26,725 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) [2024-06-03 19:24:26,743 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 [2024-06-03 19:24:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:24:26,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:24:26,756 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:24:26,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:24:26,756 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:24:26,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:24:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:24:26,757 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:24:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:24:26,757 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:24:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:24:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:24:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:24:26,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:24:26,759 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:24:26,873 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:24:26,875 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:24:27,208 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:24:27,209 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:24:27,340 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:24:27,341 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:24:27,341 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:24:27 BoogieIcfgContainer [2024-06-03 19:24:27,341 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:24:27,343 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:24:27,343 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:24:27,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:24:27,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:24:25" (1/4) ... [2024-06-03 19:24:27,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4164e7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:24:27, skipping insertion in model container [2024-06-03 19:24:27,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:24:25" (2/4) ... [2024-06-03 19:24:27,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4164e7f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:24:27, skipping insertion in model container [2024-06-03 19:24:27,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:26" (3/4) ... [2024-06-03 19:24:27,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4164e7f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:24:27, skipping insertion in model container [2024-06-03 19:24:27,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:24:27" (4/4) ... [2024-06-03 19:24:27,347 INFO L112 eAbstractionObserver]: Analyzing ICFG mix020.opt.i [2024-06-03 19:24:27,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:24:27,359 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:24:27,360 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:24:27,419 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:24:27,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:24:27,475 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-03 19:24:27,475 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:24:27,479 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. [2024-06-03 19:24:27,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:24:27,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-03 19:24:27,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:24:27,497 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;@6acfdfcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:24:27,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:24:27,502 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:24:27,502 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:24:27,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:24:27,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:27,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:24:27,503 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)] === [2024-06-03 19:24:27,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash -13335953, now seen corresponding path program 1 times [2024-06-03 19:24:27,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:27,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642769054] [2024-06-03 19:24:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:28,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:28,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642769054] [2024-06-03 19:24:28,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642769054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:28,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:28,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:24:28,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997747230] [2024-06-03 19:24:28,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:28,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:24:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:28,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:24:28,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:24:28,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-03 19:24:28,549 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) [2024-06-03 19:24:28,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:28,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-03 19:24:28,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:29,566 INFO L124 PetriNetUnfolderBase]: 6197/8802 cut-off events. [2024-06-03 19:24:29,567 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-06-03 19:24:29,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17550 conditions, 8802 events. 6197/8802 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 49888 event pairs, 4558 based on Foata normal form. 1/8524 useless extension candidates. Maximal degree in co-relation 17534. Up to 8479 conditions per place. [2024-06-03 19:24:29,620 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 43 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-03 19:24:29,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 231 flow [2024-06-03 19:24:29,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:24:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:24:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-03 19:24:29,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-06-03 19:24:29,633 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 100 transitions. [2024-06-03 19:24:29,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 231 flow [2024-06-03 19:24:29,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:24:29,641 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-03 19:24:29,643 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} [2024-06-03 19:24:29,646 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-03 19:24:29,646 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-03 19:24:29,647 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) [2024-06-03 19:24:29,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:29,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:29,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:24:29,647 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)] === [2024-06-03 19:24:29,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash 69080206, now seen corresponding path program 1 times [2024-06-03 19:24:29,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:29,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974588437] [2024-06-03 19:24:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:30,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:30,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974588437] [2024-06-03 19:24:30,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974588437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:30,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:30,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:24:30,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255160230] [2024-06-03 19:24:30,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:30,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:24:30,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:24:30,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:24:30,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:24:30,383 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) [2024-06-03 19:24:30,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:30,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:24:30,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:31,388 INFO L124 PetriNetUnfolderBase]: 7092/9843 cut-off events. [2024-06-03 19:24:31,388 INFO L125 PetriNetUnfolderBase]: For 2062/2062 co-relation queries the response was YES. [2024-06-03 19:24:31,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22572 conditions, 9843 events. 7092/9843 cut-off events. For 2062/2062 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 54305 event pairs, 4490 based on Foata normal form. 4/9822 useless extension candidates. Maximal degree in co-relation 22557. Up to 9649 conditions per place. [2024-06-03 19:24:31,435 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-03 19:24:31,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 325 flow [2024-06-03 19:24:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:24:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:24:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-03 19:24:31,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990566037735849 [2024-06-03 19:24:31,437 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 127 transitions. [2024-06-03 19:24:31,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 325 flow [2024-06-03 19:24:31,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:24:31,439 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-03 19:24:31,439 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} [2024-06-03 19:24:31,440 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-03 19:24:31,440 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-03 19:24:31,440 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) [2024-06-03 19:24:31,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:31,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:31,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:24:31,441 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)] === [2024-06-03 19:24:31,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash 680048381, now seen corresponding path program 1 times [2024-06-03 19:24:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:31,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171799893] [2024-06-03 19:24:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:31,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:32,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171799893] [2024-06-03 19:24:32,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171799893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:32,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:32,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:24:32,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776475826] [2024-06-03 19:24:32,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:32,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:24:32,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:24:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:24:32,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:24:32,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:32,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:32,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:24:32,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:33,525 INFO L124 PetriNetUnfolderBase]: 9006/12420 cut-off events. [2024-06-03 19:24:33,526 INFO L125 PetriNetUnfolderBase]: For 6995/6995 co-relation queries the response was YES. [2024-06-03 19:24:33,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31565 conditions, 12420 events. 9006/12420 cut-off events. For 6995/6995 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 66855 event pairs, 4478 based on Foata normal form. 8/12395 useless extension candidates. Maximal degree in co-relation 31548. Up to 12137 conditions per place. [2024-06-03 19:24:33,591 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 72 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-03 19:24:33,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 490 flow [2024-06-03 19:24:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:24:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:24:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-03 19:24:33,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2024-06-03 19:24:33,597 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 176 transitions. [2024-06-03 19:24:33,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 490 flow [2024-06-03 19:24:33,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 462 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 19:24:33,602 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-03 19:24:33,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-03 19:24:33,604 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-03 19:24:33,604 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-03 19:24:33,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:33,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:33,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:33,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:24:33,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:33,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:33,606 INFO L85 PathProgramCache]: Analyzing trace with hash 278349518, now seen corresponding path program 1 times [2024-06-03 19:24:33,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:33,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448585715] [2024-06-03 19:24:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:33,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:34,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:34,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448585715] [2024-06-03 19:24:34,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448585715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:34,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:34,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:24:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372664581] [2024-06-03 19:24:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:34,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:24:34,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:34,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:24:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:24:34,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:24:34,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:34,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:34,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:24:34,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:35,576 INFO L124 PetriNetUnfolderBase]: 7847/11081 cut-off events. [2024-06-03 19:24:35,576 INFO L125 PetriNetUnfolderBase]: For 11293/11293 co-relation queries the response was YES. [2024-06-03 19:24:35,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30882 conditions, 11081 events. 7847/11081 cut-off events. For 11293/11293 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 61333 event pairs, 4266 based on Foata normal form. 3/10906 useless extension candidates. Maximal degree in co-relation 30863. Up to 10669 conditions per place. [2024-06-03 19:24:35,624 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 60 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-03 19:24:35,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 449 flow [2024-06-03 19:24:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:24:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:24:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-03 19:24:35,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-06-03 19:24:35,626 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 132 transitions. [2024-06-03 19:24:35,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 449 flow [2024-06-03 19:24:35,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 411 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:35,630 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-03 19:24:35,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-03 19:24:35,631 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-03 19:24:35,632 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-03 19:24:35,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:35,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:35,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:35,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:24:35,632 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)] === [2024-06-03 19:24:35,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash 69288294, now seen corresponding path program 1 times [2024-06-03 19:24:35,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:35,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68664333] [2024-06-03 19:24:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:35,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:36,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:36,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68664333] [2024-06-03 19:24:36,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68664333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:36,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:36,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:24:36,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775493490] [2024-06-03 19:24:36,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:36,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:24:36,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:36,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:24:36,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:24:36,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:24:36,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 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) [2024-06-03 19:24:36,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:36,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:24:36,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:37,779 INFO L124 PetriNetUnfolderBase]: 7880/11287 cut-off events. [2024-06-03 19:24:37,779 INFO L125 PetriNetUnfolderBase]: For 17923/17923 co-relation queries the response was YES. [2024-06-03 19:24:37,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33940 conditions, 11287 events. 7880/11287 cut-off events. For 17923/17923 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 63984 event pairs, 4072 based on Foata normal form. 7/11260 useless extension candidates. Maximal degree in co-relation 33919. Up to 10583 conditions per place. [2024-06-03 19:24:37,841 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 76 selfloop transitions, 22 changer transitions 0/106 dead transitions. [2024-06-03 19:24:37,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 650 flow [2024-06-03 19:24:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:24:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:24:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-03 19:24:37,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-03 19:24:37,842 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 168 transitions. [2024-06-03 19:24:37,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 650 flow [2024-06-03 19:24:37,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 621 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:37,847 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 407 flow [2024-06-03 19:24:37,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=407, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-03 19:24:37,848 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-03 19:24:37,848 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 407 flow [2024-06-03 19:24:37,858 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) [2024-06-03 19:24:37,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:37,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:37,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:24:37,859 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)] === [2024-06-03 19:24:37,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1109658049, now seen corresponding path program 1 times [2024-06-03 19:24:37,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:37,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027855444] [2024-06-03 19:24:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:37,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:38,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:38,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027855444] [2024-06-03 19:24:38,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027855444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:38,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:38,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:24:38,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596945483] [2024-06-03 19:24:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:38,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:24:38,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:24:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:24:38,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:38,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:38,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:38,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:38,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:39,949 INFO L124 PetriNetUnfolderBase]: 9052/12513 cut-off events. [2024-06-03 19:24:39,949 INFO L125 PetriNetUnfolderBase]: For 34286/34298 co-relation queries the response was YES. [2024-06-03 19:24:39,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43475 conditions, 12513 events. 9052/12513 cut-off events. For 34286/34298 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 67339 event pairs, 4664 based on Foata normal form. 11/12511 useless extension candidates. Maximal degree in co-relation 43451. Up to 12214 conditions per place. [2024-06-03 19:24:40,020 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 85 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-03 19:24:40,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 793 flow [2024-06-03 19:24:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:24:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:24:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 19:24:40,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-03 19:24:40,022 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 407 flow. Second operand 6 states and 160 transitions. [2024-06-03 19:24:40,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 793 flow [2024-06-03 19:24:40,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 771 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-03 19:24:40,030 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 514 flow [2024-06-03 19:24:40,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-03 19:24:40,031 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-03 19:24:40,031 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 514 flow [2024-06-03 19:24:40,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:40,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:40,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:40,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:24:40,032 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)] === [2024-06-03 19:24:40,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:40,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2114949289, now seen corresponding path program 2 times [2024-06-03 19:24:40,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:40,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936814690] [2024-06-03 19:24:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:40,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:40,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:40,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936814690] [2024-06-03 19:24:40,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936814690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:40,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:40,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:24:40,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710268480] [2024-06-03 19:24:40,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:40,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:24:40,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:40,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:24:40,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:24:40,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:40,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:40,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:40,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:40,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:42,561 INFO L124 PetriNetUnfolderBase]: 9043/12502 cut-off events. [2024-06-03 19:24:42,562 INFO L125 PetriNetUnfolderBase]: For 46031/46039 co-relation queries the response was YES. [2024-06-03 19:24:42,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46591 conditions, 12502 events. 9043/12502 cut-off events. For 46031/46039 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 67355 event pairs, 4667 based on Foata normal form. 9/12498 useless extension candidates. Maximal degree in co-relation 46564. Up to 12205 conditions per place. [2024-06-03 19:24:42,652 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 79 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-03 19:24:42,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 776 flow [2024-06-03 19:24:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:24:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:24:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 19:24:42,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-03 19:24:42,654 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 514 flow. Second operand 6 states and 154 transitions. [2024-06-03 19:24:42,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 776 flow [2024-06-03 19:24:42,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 718 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-03 19:24:42,687 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 509 flow [2024-06-03 19:24:42,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-03 19:24:42,689 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-03 19:24:42,689 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 509 flow [2024-06-03 19:24:42,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:42,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:42,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:42,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:24:42,690 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)] === [2024-06-03 19:24:42,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:42,690 INFO L85 PathProgramCache]: Analyzing trace with hash 136926087, now seen corresponding path program 1 times [2024-06-03 19:24:42,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:42,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903599075] [2024-06-03 19:24:42,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:42,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:43,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:43,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903599075] [2024-06-03 19:24:43,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903599075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:43,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:43,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:43,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235672845] [2024-06-03 19:24:43,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:43,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:43,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:43,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:43,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 509 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:43,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:43,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:43,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:45,034 INFO L124 PetriNetUnfolderBase]: 9134/12640 cut-off events. [2024-06-03 19:24:45,035 INFO L125 PetriNetUnfolderBase]: For 51584/51588 co-relation queries the response was YES. [2024-06-03 19:24:45,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47523 conditions, 12640 events. 9134/12640 cut-off events. For 51584/51588 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 68046 event pairs, 4657 based on Foata normal form. 7/12636 useless extension candidates. Maximal degree in co-relation 47494. Up to 12307 conditions per place. [2024-06-03 19:24:45,123 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 103 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2024-06-03 19:24:45,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 142 transitions, 1006 flow [2024-06-03 19:24:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:24:45,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-03 19:24:45,127 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 509 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:24:45,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 142 transitions, 1006 flow [2024-06-03 19:24:45,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 142 transitions, 932 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:45,160 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 667 flow [2024-06-03 19:24:45,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=667, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-03 19:24:45,162 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-03 19:24:45,163 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 667 flow [2024-06-03 19:24:45,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:45,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:45,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:45,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:24:45,164 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:45,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:45,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1447738305, now seen corresponding path program 2 times [2024-06-03 19:24:45,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:45,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209353206] [2024-06-03 19:24:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:46,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:46,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209353206] [2024-06-03 19:24:46,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209353206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:46,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:46,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:46,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244199997] [2024-06-03 19:24:46,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:46,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:46,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:46,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:46,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:46,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:46,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 667 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:46,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:46,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:46,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:47,694 INFO L124 PetriNetUnfolderBase]: 9156/12673 cut-off events. [2024-06-03 19:24:47,694 INFO L125 PetriNetUnfolderBase]: For 65779/65787 co-relation queries the response was YES. [2024-06-03 19:24:47,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51085 conditions, 12673 events. 9156/12673 cut-off events. For 65779/65787 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 68142 event pairs, 4503 based on Foata normal form. 11/12672 useless extension candidates. Maximal degree in co-relation 51054. Up to 12314 conditions per place. [2024-06-03 19:24:47,780 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 103 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-03 19:24:47,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1117 flow [2024-06-03 19:24:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 19:24:47,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-03 19:24:47,782 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 667 flow. Second operand 7 states and 182 transitions. [2024-06-03 19:24:47,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1117 flow [2024-06-03 19:24:47,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 1053 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:47,825 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 744 flow [2024-06-03 19:24:47,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-03 19:24:47,826 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-03 19:24:47,826 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 744 flow [2024-06-03 19:24:47,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:47,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:47,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:47,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:24:47,829 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)] === [2024-06-03 19:24:47,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:47,830 INFO L85 PathProgramCache]: Analyzing trace with hash -39660143, now seen corresponding path program 1 times [2024-06-03 19:24:47,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:47,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750826330] [2024-06-03 19:24:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:47,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:48,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:48,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750826330] [2024-06-03 19:24:48,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750826330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:48,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:48,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:48,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332406699] [2024-06-03 19:24:48,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:48,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:48,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:48,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:48,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:48,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 744 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:48,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:48,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:48,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:50,338 INFO L124 PetriNetUnfolderBase]: 9312/12891 cut-off events. [2024-06-03 19:24:50,339 INFO L125 PetriNetUnfolderBase]: For 83665/83673 co-relation queries the response was YES. [2024-06-03 19:24:50,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55163 conditions, 12891 events. 9312/12891 cut-off events. For 83665/83673 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 69299 event pairs, 4186 based on Foata normal form. 15/12886 useless extension candidates. Maximal degree in co-relation 55131. Up to 12140 conditions per place. [2024-06-03 19:24:50,417 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 120 selfloop transitions, 43 changer transitions 0/170 dead transitions. [2024-06-03 19:24:50,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 170 transitions, 1500 flow [2024-06-03 19:24:50,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-03 19:24:50,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363881401617251 [2024-06-03 19:24:50,419 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 744 flow. Second operand 7 states and 199 transitions. [2024-06-03 19:24:50,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 170 transitions, 1500 flow [2024-06-03 19:24:50,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 170 transitions, 1369 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 19:24:50,459 INFO L231 Difference]: Finished difference. Result has 90 places, 121 transitions, 904 flow [2024-06-03 19:24:50,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=904, PETRI_PLACES=90, PETRI_TRANSITIONS=121} [2024-06-03 19:24:50,460 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-06-03 19:24:50,460 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 121 transitions, 904 flow [2024-06-03 19:24:50,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:50,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:50,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:50,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:24:50,461 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)] === [2024-06-03 19:24:50,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:50,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1364310637, now seen corresponding path program 3 times [2024-06-03 19:24:50,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:50,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102647842] [2024-06-03 19:24:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:50,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:51,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:51,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102647842] [2024-06-03 19:24:51,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102647842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:51,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:51,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:51,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838541462] [2024-06-03 19:24:51,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:51,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:51,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:51,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:51,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 121 transitions, 904 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:51,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:51,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:51,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:52,997 INFO L124 PetriNetUnfolderBase]: 9334/12944 cut-off events. [2024-06-03 19:24:52,997 INFO L125 PetriNetUnfolderBase]: For 89715/89729 co-relation queries the response was YES. [2024-06-03 19:24:53,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57610 conditions, 12944 events. 9334/12944 cut-off events. For 89715/89729 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 69857 event pairs, 4333 based on Foata normal form. 11/12939 useless extension candidates. Maximal degree in co-relation 57575. Up to 12464 conditions per place. [2024-06-03 19:24:53,084 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 108 selfloop transitions, 50 changer transitions 0/165 dead transitions. [2024-06-03 19:24:53,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 165 transitions, 1492 flow [2024-06-03 19:24:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-03 19:24:53,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-03 19:24:53,085 INFO L175 Difference]: Start difference. First operand has 90 places, 121 transitions, 904 flow. Second operand 7 states and 186 transitions. [2024-06-03 19:24:53,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 165 transitions, 1492 flow [2024-06-03 19:24:53,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 165 transitions, 1424 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-03 19:24:53,130 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1063 flow [2024-06-03 19:24:53,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1063, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-03 19:24:53,131 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-03 19:24:53,131 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1063 flow [2024-06-03 19:24:53,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:53,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:53,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:53,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:24:53,131 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:53,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:53,132 INFO L85 PathProgramCache]: Analyzing trace with hash 938259967, now seen corresponding path program 2 times [2024-06-03 19:24:53,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:53,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379673317] [2024-06-03 19:24:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:53,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:53,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:53,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379673317] [2024-06-03 19:24:53,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379673317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:53,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:53,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:53,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812272289] [2024-06-03 19:24:53,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:53,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:53,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:53,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:53,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1063 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:53,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:53,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:53,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:55,651 INFO L124 PetriNetUnfolderBase]: 9444/13098 cut-off events. [2024-06-03 19:24:55,651 INFO L125 PetriNetUnfolderBase]: For 109587/109607 co-relation queries the response was YES. [2024-06-03 19:24:55,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61466 conditions, 13098 events. 9444/13098 cut-off events. For 109587/109607 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 70692 event pairs, 4143 based on Foata normal form. 21/13104 useless extension candidates. Maximal degree in co-relation 61429. Up to 12270 conditions per place. [2024-06-03 19:24:55,748 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 122 selfloop transitions, 59 changer transitions 0/188 dead transitions. [2024-06-03 19:24:55,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 188 transitions, 1854 flow [2024-06-03 19:24:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-03 19:24:55,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256064690026954 [2024-06-03 19:24:55,750 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1063 flow. Second operand 7 states and 195 transitions. [2024-06-03 19:24:55,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 188 transitions, 1854 flow [2024-06-03 19:24:55,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 188 transitions, 1775 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:55,818 INFO L231 Difference]: Finished difference. Result has 100 places, 143 transitions, 1300 flow [2024-06-03 19:24:55,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1300, PETRI_PLACES=100, PETRI_TRANSITIONS=143} [2024-06-03 19:24:55,819 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-03 19:24:55,819 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 143 transitions, 1300 flow [2024-06-03 19:24:55,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:55,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:55,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:55,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:24:55,820 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)] === [2024-06-03 19:24:55,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:55,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1270602135, now seen corresponding path program 4 times [2024-06-03 19:24:55,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:55,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700106197] [2024-06-03 19:24:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:55,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:56,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:56,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700106197] [2024-06-03 19:24:56,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700106197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:56,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:56,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:56,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192626616] [2024-06-03 19:24:56,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:56,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:56,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:56,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:56,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:56,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:56,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 143 transitions, 1300 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:56,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:56,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:56,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:58,353 INFO L124 PetriNetUnfolderBase]: 9435/13096 cut-off events. [2024-06-03 19:24:58,353 INFO L125 PetriNetUnfolderBase]: For 129109/129113 co-relation queries the response was YES. [2024-06-03 19:24:58,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64325 conditions, 13096 events. 9435/13096 cut-off events. For 129109/129113 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70825 event pairs, 4356 based on Foata normal form. 3/13073 useless extension candidates. Maximal degree in co-relation 64285. Up to 12601 conditions per place. [2024-06-03 19:24:58,448 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 117 selfloop transitions, 50 changer transitions 0/174 dead transitions. [2024-06-03 19:24:58,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 174 transitions, 1732 flow [2024-06-03 19:24:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-03 19:24:58,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-03 19:24:58,449 INFO L175 Difference]: Start difference. First operand has 100 places, 143 transitions, 1300 flow. Second operand 7 states and 180 transitions. [2024-06-03 19:24:58,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 174 transitions, 1732 flow [2024-06-03 19:24:58,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 174 transitions, 1660 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-03 19:24:58,536 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1339 flow [2024-06-03 19:24:58,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1339, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-03 19:24:58,537 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-03 19:24:58,537 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1339 flow [2024-06-03 19:24:58,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:58,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:58,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:58,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:24:58,538 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)] === [2024-06-03 19:24:58,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:58,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2133639001, now seen corresponding path program 3 times [2024-06-03 19:24:58,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:58,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469535873] [2024-06-03 19:24:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:58,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:59,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:59,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469535873] [2024-06-03 19:24:59,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469535873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:59,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:59,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:59,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007988779] [2024-06-03 19:24:59,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:59,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:59,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:59,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:59,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:59,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:59,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1339 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:59,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:59,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:59,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:01,139 INFO L124 PetriNetUnfolderBase]: 9422/13070 cut-off events. [2024-06-03 19:25:01,139 INFO L125 PetriNetUnfolderBase]: For 133383/133403 co-relation queries the response was YES. [2024-06-03 19:25:01,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64072 conditions, 13070 events. 9422/13070 cut-off events. For 133383/133403 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 70478 event pairs, 4157 based on Foata normal form. 21/13076 useless extension candidates. Maximal degree in co-relation 64029. Up to 12251 conditions per place. [2024-06-03 19:25:01,243 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 126 selfloop transitions, 54 changer transitions 0/187 dead transitions. [2024-06-03 19:25:01,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 187 transitions, 1979 flow [2024-06-03 19:25:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:25:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:25:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-03 19:25:01,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-03 19:25:01,245 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1339 flow. Second operand 7 states and 194 transitions. [2024-06-03 19:25:01,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 187 transitions, 1979 flow [2024-06-03 19:25:01,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 187 transitions, 1823 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 19:25:01,322 INFO L231 Difference]: Finished difference. Result has 107 places, 143 transitions, 1304 flow [2024-06-03 19:25:01,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1304, PETRI_PLACES=107, PETRI_TRANSITIONS=143} [2024-06-03 19:25:01,323 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-03 19:25:01,323 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 143 transitions, 1304 flow [2024-06-03 19:25:01,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:01,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:01,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:01,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:25:01,324 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)] === [2024-06-03 19:25:01,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:01,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1270355871, now seen corresponding path program 1 times [2024-06-03 19:25:01,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:01,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445344670] [2024-06-03 19:25:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:01,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:02,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:02,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445344670] [2024-06-03 19:25:02,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445344670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:02,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:02,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:25:02,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583196582] [2024-06-03 19:25:02,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:02,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:25:02,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:25:02,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:25:02,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:25:02,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 143 transitions, 1304 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) [2024-06-03 19:25:02,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:02,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:25:02,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:03,914 INFO L124 PetriNetUnfolderBase]: 8418/12114 cut-off events. [2024-06-03 19:25:03,914 INFO L125 PetriNetUnfolderBase]: For 129256/129258 co-relation queries the response was YES. [2024-06-03 19:25:03,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59491 conditions, 12114 events. 8418/12114 cut-off events. For 129256/129258 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 69032 event pairs, 3568 based on Foata normal form. 26/12111 useless extension candidates. Maximal degree in co-relation 59447. Up to 11139 conditions per place. [2024-06-03 19:25:04,007 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 156 selfloop transitions, 25 changer transitions 0/189 dead transitions. [2024-06-03 19:25:04,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 189 transitions, 1950 flow [2024-06-03 19:25:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:25:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:25:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-03 19:25:04,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5309973045822103 [2024-06-03 19:25:04,024 INFO L175 Difference]: Start difference. First operand has 107 places, 143 transitions, 1304 flow. Second operand 7 states and 197 transitions. [2024-06-03 19:25:04,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 189 transitions, 1950 flow [2024-06-03 19:25:04,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 189 transitions, 1813 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:04,153 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1284 flow [2024-06-03 19:25:04,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1284, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-06-03 19:25:04,153 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-03 19:25:04,153 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1284 flow [2024-06-03 19:25:04,154 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) [2024-06-03 19:25:04,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:04,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:04,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:25:04,154 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)] === [2024-06-03 19:25:04,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1707059177, now seen corresponding path program 1 times [2024-06-03 19:25:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:04,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186623564] [2024-06-03 19:25:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:04,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:04,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186623564] [2024-06-03 19:25:04,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186623564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:04,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:04,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:25:04,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789566303] [2024-06-03 19:25:04,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:04,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:25:04,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:25:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:25:04,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:25:04,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1284 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:04,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:04,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:25:04,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:06,214 INFO L124 PetriNetUnfolderBase]: 7960/11642 cut-off events. [2024-06-03 19:25:06,214 INFO L125 PetriNetUnfolderBase]: For 141110/141127 co-relation queries the response was YES. [2024-06-03 19:25:06,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58928 conditions, 11642 events. 7960/11642 cut-off events. For 141110/141127 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 68400 event pairs, 3697 based on Foata normal form. 19/11641 useless extension candidates. Maximal degree in co-relation 58885. Up to 10734 conditions per place. [2024-06-03 19:25:06,309 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 132 selfloop transitions, 10 changer transitions 0/161 dead transitions. [2024-06-03 19:25:06,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 161 transitions, 1614 flow [2024-06-03 19:25:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:25:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:25:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-03 19:25:06,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-03 19:25:06,310 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1284 flow. Second operand 5 states and 133 transitions. [2024-06-03 19:25:06,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 161 transitions, 1614 flow [2024-06-03 19:25:06,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1519 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 19:25:06,426 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1218 flow [2024-06-03 19:25:06,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1218, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-06-03 19:25:06,427 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-03 19:25:06,427 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1218 flow [2024-06-03 19:25:06,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:06,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:06,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:06,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:25:06,428 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:06,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1233188261, now seen corresponding path program 1 times [2024-06-03 19:25:06,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:06,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168505706] [2024-06-03 19:25:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:06,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:07,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:07,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168505706] [2024-06-03 19:25:07,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168505706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:07,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:07,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:07,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286509850] [2024-06-03 19:25:07,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:07,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:07,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:07,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:07,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1218 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) [2024-06-03 19:25:07,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:07,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:07,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:09,180 INFO L124 PetriNetUnfolderBase]: 9710/13533 cut-off events. [2024-06-03 19:25:09,180 INFO L125 PetriNetUnfolderBase]: For 181036/181044 co-relation queries the response was YES. [2024-06-03 19:25:09,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69483 conditions, 13533 events. 9710/13533 cut-off events. For 181036/181044 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 74023 event pairs, 4156 based on Foata normal form. 15/13542 useless extension candidates. Maximal degree in co-relation 69439. Up to 12842 conditions per place. [2024-06-03 19:25:09,284 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 161 selfloop transitions, 48 changer transitions 0/216 dead transitions. [2024-06-03 19:25:09,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2156 flow [2024-06-03 19:25:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:09,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-03 19:25:09,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259433962264151 [2024-06-03 19:25:09,289 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1218 flow. Second operand 8 states and 223 transitions. [2024-06-03 19:25:09,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2156 flow [2024-06-03 19:25:09,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 216 transitions, 2127 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 19:25:09,391 INFO L231 Difference]: Finished difference. Result has 113 places, 160 transitions, 1513 flow [2024-06-03 19:25:09,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1513, PETRI_PLACES=113, PETRI_TRANSITIONS=160} [2024-06-03 19:25:09,391 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-03 19:25:09,391 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 160 transitions, 1513 flow [2024-06-03 19:25:09,392 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) [2024-06-03 19:25:09,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:09,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:09,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:25:09,392 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:09,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1917600559, now seen corresponding path program 2 times [2024-06-03 19:25:09,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:09,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152860095] [2024-06-03 19:25:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:09,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:10,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:10,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152860095] [2024-06-03 19:25:10,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152860095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:10,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:10,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865838125] [2024-06-03 19:25:10,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:10,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:10,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:10,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:10,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:10,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:10,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 160 transitions, 1513 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) [2024-06-03 19:25:10,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:10,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:10,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:12,400 INFO L124 PetriNetUnfolderBase]: 9943/13895 cut-off events. [2024-06-03 19:25:12,400 INFO L125 PetriNetUnfolderBase]: For 221105/221107 co-relation queries the response was YES. [2024-06-03 19:25:12,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76944 conditions, 13895 events. 9943/13895 cut-off events. For 221105/221107 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 76748 event pairs, 3981 based on Foata normal form. 7/13885 useless extension candidates. Maximal degree in co-relation 76898. Up to 12358 conditions per place. [2024-06-03 19:25:12,517 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 131 selfloop transitions, 98 changer transitions 0/236 dead transitions. [2024-06-03 19:25:12,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 236 transitions, 2749 flow [2024-06-03 19:25:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-03 19:25:12,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448113207547169 [2024-06-03 19:25:12,519 INFO L175 Difference]: Start difference. First operand has 113 places, 160 transitions, 1513 flow. Second operand 8 states and 231 transitions. [2024-06-03 19:25:12,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 236 transitions, 2749 flow [2024-06-03 19:25:12,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 236 transitions, 2606 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-03 19:25:12,681 INFO L231 Difference]: Finished difference. Result has 119 places, 179 transitions, 1916 flow [2024-06-03 19:25:12,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1916, PETRI_PLACES=119, PETRI_TRANSITIONS=179} [2024-06-03 19:25:12,682 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-03 19:25:12,682 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 179 transitions, 1916 flow [2024-06-03 19:25:12,682 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) [2024-06-03 19:25:12,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:12,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:12,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:25:12,682 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:12,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:12,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1229469191, now seen corresponding path program 3 times [2024-06-03 19:25:12,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:12,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276530192] [2024-06-03 19:25:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:12,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:13,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:13,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276530192] [2024-06-03 19:25:13,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276530192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:13,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:13,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:13,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157340012] [2024-06-03 19:25:13,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:13,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:13,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:13,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:13,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 179 transitions, 1916 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) [2024-06-03 19:25:13,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:13,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:13,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:15,701 INFO L124 PetriNetUnfolderBase]: 9930/13879 cut-off events. [2024-06-03 19:25:15,701 INFO L125 PetriNetUnfolderBase]: For 262443/262445 co-relation queries the response was YES. [2024-06-03 19:25:15,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82528 conditions, 13879 events. 9930/13879 cut-off events. For 262443/262445 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 76624 event pairs, 3995 based on Foata normal form. 7/13869 useless extension candidates. Maximal degree in co-relation 82479. Up to 12351 conditions per place. [2024-06-03 19:25:15,838 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 136 selfloop transitions, 92 changer transitions 0/235 dead transitions. [2024-06-03 19:25:15,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 235 transitions, 2876 flow [2024-06-03 19:25:15,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-03 19:25:15,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2024-06-03 19:25:15,842 INFO L175 Difference]: Start difference. First operand has 119 places, 179 transitions, 1916 flow. Second operand 8 states and 230 transitions. [2024-06-03 19:25:15,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 235 transitions, 2876 flow [2024-06-03 19:25:16,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 235 transitions, 2722 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-03 19:25:16,079 INFO L231 Difference]: Finished difference. Result has 125 places, 179 transitions, 1961 flow [2024-06-03 19:25:16,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1961, PETRI_PLACES=125, PETRI_TRANSITIONS=179} [2024-06-03 19:25:16,080 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-03 19:25:16,080 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 179 transitions, 1961 flow [2024-06-03 19:25:16,080 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) [2024-06-03 19:25:16,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:16,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:16,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:25:16,080 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)] === [2024-06-03 19:25:16,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:16,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1715109641, now seen corresponding path program 4 times [2024-06-03 19:25:16,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:16,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360354034] [2024-06-03 19:25:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:16,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:16,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:16,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360354034] [2024-06-03 19:25:16,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360354034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:16,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:16,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:16,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49811224] [2024-06-03 19:25:16,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:16,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:16,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:17,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:17,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 179 transitions, 1961 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) [2024-06-03 19:25:17,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:17,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:17,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:19,051 INFO L124 PetriNetUnfolderBase]: 10040/14053 cut-off events. [2024-06-03 19:25:19,051 INFO L125 PetriNetUnfolderBase]: For 271748/271752 co-relation queries the response was YES. [2024-06-03 19:25:19,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82484 conditions, 14053 events. 10040/14053 cut-off events. For 271748/271752 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 77838 event pairs, 3937 based on Foata normal form. 7/14037 useless extension candidates. Maximal degree in co-relation 82433. Up to 12451 conditions per place. [2024-06-03 19:25:19,346 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 118 selfloop transitions, 115 changer transitions 0/240 dead transitions. [2024-06-03 19:25:19,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 240 transitions, 3015 flow [2024-06-03 19:25:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-03 19:25:19,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-03 19:25:19,348 INFO L175 Difference]: Start difference. First operand has 125 places, 179 transitions, 1961 flow. Second operand 8 states and 224 transitions. [2024-06-03 19:25:19,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 240 transitions, 3015 flow [2024-06-03 19:25:19,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 240 transitions, 2758 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:19,518 INFO L231 Difference]: Finished difference. Result has 127 places, 190 transitions, 2207 flow [2024-06-03 19:25:19,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2207, PETRI_PLACES=127, PETRI_TRANSITIONS=190} [2024-06-03 19:25:19,519 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-03 19:25:19,519 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 190 transitions, 2207 flow [2024-06-03 19:25:19,519 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) [2024-06-03 19:25:19,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:19,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:19,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:25:19,519 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:19,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1718304349, now seen corresponding path program 5 times [2024-06-03 19:25:19,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:19,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305659578] [2024-06-03 19:25:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:19,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:20,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:20,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305659578] [2024-06-03 19:25:20,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305659578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:20,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:20,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:20,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757684088] [2024-06-03 19:25:20,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:20,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:20,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:20,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:20,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:20,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 190 transitions, 2207 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) [2024-06-03 19:25:20,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:20,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:20,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:22,613 INFO L124 PetriNetUnfolderBase]: 10104/14163 cut-off events. [2024-06-03 19:25:22,613 INFO L125 PetriNetUnfolderBase]: For 301222/301236 co-relation queries the response was YES. [2024-06-03 19:25:22,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85508 conditions, 14163 events. 10104/14163 cut-off events. For 301222/301236 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 78648 event pairs, 3979 based on Foata normal form. 17/14157 useless extension candidates. Maximal degree in co-relation 85456. Up to 12510 conditions per place. [2024-06-03 19:25:22,723 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 135 selfloop transitions, 105 changer transitions 0/247 dead transitions. [2024-06-03 19:25:22,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 247 transitions, 3268 flow [2024-06-03 19:25:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-03 19:25:22,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2024-06-03 19:25:22,725 INFO L175 Difference]: Start difference. First operand has 127 places, 190 transitions, 2207 flow. Second operand 8 states and 226 transitions. [2024-06-03 19:25:22,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 247 transitions, 3268 flow [2024-06-03 19:25:22,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 247 transitions, 3142 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-03 19:25:22,935 INFO L231 Difference]: Finished difference. Result has 132 places, 195 transitions, 2399 flow [2024-06-03 19:25:22,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2399, PETRI_PLACES=132, PETRI_TRANSITIONS=195} [2024-06-03 19:25:22,936 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-03 19:25:22,936 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 195 transitions, 2399 flow [2024-06-03 19:25:22,936 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) [2024-06-03 19:25:22,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:22,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:22,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:25:22,936 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)] === [2024-06-03 19:25:22,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1718298769, now seen corresponding path program 6 times [2024-06-03 19:25:22,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:22,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918409225] [2024-06-03 19:25:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:22,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:23,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:23,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918409225] [2024-06-03 19:25:23,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918409225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:23,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:23,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:23,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048031369] [2024-06-03 19:25:23,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:23,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:23,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:23,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:23,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:23,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 195 transitions, 2399 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) [2024-06-03 19:25:23,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:23,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:23,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:25,998 INFO L124 PetriNetUnfolderBase]: 10091/14145 cut-off events. [2024-06-03 19:25:25,998 INFO L125 PetriNetUnfolderBase]: For 301032/301036 co-relation queries the response was YES. [2024-06-03 19:25:26,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84938 conditions, 14145 events. 10091/14145 cut-off events. For 301032/301036 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 78475 event pairs, 3972 based on Foata normal form. 7/14129 useless extension candidates. Maximal degree in co-relation 84884. Up to 12503 conditions per place. [2024-06-03 19:25:26,130 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 131 selfloop transitions, 106 changer transitions 0/244 dead transitions. [2024-06-03 19:25:26,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 244 transitions, 3255 flow [2024-06-03 19:25:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-03 19:25:26,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-03 19:25:26,131 INFO L175 Difference]: Start difference. First operand has 132 places, 195 transitions, 2399 flow. Second operand 8 states and 224 transitions. [2024-06-03 19:25:26,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 244 transitions, 3255 flow [2024-06-03 19:25:26,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 244 transitions, 2801 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-03 19:25:26,392 INFO L231 Difference]: Finished difference. Result has 131 places, 195 transitions, 2169 flow [2024-06-03 19:25:26,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2169, PETRI_PLACES=131, PETRI_TRANSITIONS=195} [2024-06-03 19:25:26,393 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-03 19:25:26,393 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 195 transitions, 2169 flow [2024-06-03 19:25:26,393 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) [2024-06-03 19:25:26,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:26,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:26,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:25:26,393 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)] === [2024-06-03 19:25:26,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:26,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2137556344, now seen corresponding path program 1 times [2024-06-03 19:25:26,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:26,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791015413] [2024-06-03 19:25:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:26,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:27,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:27,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791015413] [2024-06-03 19:25:27,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791015413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:27,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:27,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:27,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587344529] [2024-06-03 19:25:27,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:27,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:27,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:27,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:27,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:27,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:27,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 195 transitions, 2169 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) [2024-06-03 19:25:27,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:27,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:27,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:29,373 INFO L124 PetriNetUnfolderBase]: 10178/14256 cut-off events. [2024-06-03 19:25:29,373 INFO L125 PetriNetUnfolderBase]: For 318067/318075 co-relation queries the response was YES. [2024-06-03 19:25:29,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85545 conditions, 14256 events. 10178/14256 cut-off events. For 318067/318075 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 78940 event pairs, 3275 based on Foata normal form. 14/14267 useless extension candidates. Maximal degree in co-relation 85493. Up to 13554 conditions per place. [2024-06-03 19:25:29,503 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 208 selfloop transitions, 43 changer transitions 0/258 dead transitions. [2024-06-03 19:25:29,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 258 transitions, 3105 flow [2024-06-03 19:25:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-03 19:25:29,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-03 19:25:29,505 INFO L175 Difference]: Start difference. First operand has 131 places, 195 transitions, 2169 flow. Second operand 9 states and 234 transitions. [2024-06-03 19:25:29,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 258 transitions, 3105 flow [2024-06-03 19:25:29,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 258 transitions, 2797 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 19:25:29,751 INFO L231 Difference]: Finished difference. Result has 132 places, 201 transitions, 2091 flow [2024-06-03 19:25:29,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2091, PETRI_PLACES=132, PETRI_TRANSITIONS=201} [2024-06-03 19:25:29,752 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-03 19:25:29,752 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 201 transitions, 2091 flow [2024-06-03 19:25:29,752 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) [2024-06-03 19:25:29,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:29,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:29,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:25:29,753 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:29,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:29,753 INFO L85 PathProgramCache]: Analyzing trace with hash 425865652, now seen corresponding path program 2 times [2024-06-03 19:25:29,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:29,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264302905] [2024-06-03 19:25:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:29,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:30,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264302905] [2024-06-03 19:25:30,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264302905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:30,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:30,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:30,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518284048] [2024-06-03 19:25:30,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:30,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:30,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:30,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:30,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:30,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:30,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 201 transitions, 2091 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) [2024-06-03 19:25:30,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:30,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:30,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:32,799 INFO L124 PetriNetUnfolderBase]: 10308/14424 cut-off events. [2024-06-03 19:25:32,799 INFO L125 PetriNetUnfolderBase]: For 351636/351642 co-relation queries the response was YES. [2024-06-03 19:25:32,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87647 conditions, 14424 events. 10308/14424 cut-off events. For 351636/351642 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 79412 event pairs, 3901 based on Foata normal form. 12/14427 useless extension candidates. Maximal degree in co-relation 87596. Up to 13826 conditions per place. [2024-06-03 19:25:32,939 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 210 selfloop transitions, 51 changer transitions 0/268 dead transitions. [2024-06-03 19:25:32,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 268 transitions, 3129 flow [2024-06-03 19:25:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-03 19:25:32,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612159329140461 [2024-06-03 19:25:32,941 INFO L175 Difference]: Start difference. First operand has 132 places, 201 transitions, 2091 flow. Second operand 9 states and 220 transitions. [2024-06-03 19:25:32,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 268 transitions, 3129 flow [2024-06-03 19:25:33,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 268 transitions, 2958 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-03 19:25:33,272 INFO L231 Difference]: Finished difference. Result has 140 places, 228 transitions, 2490 flow [2024-06-03 19:25:33,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2490, PETRI_PLACES=140, PETRI_TRANSITIONS=228} [2024-06-03 19:25:33,273 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-03 19:25:33,273 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 228 transitions, 2490 flow [2024-06-03 19:25:33,273 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) [2024-06-03 19:25:33,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:33,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:33,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:25:33,273 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:33,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:33,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1137469550, now seen corresponding path program 3 times [2024-06-03 19:25:33,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:33,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272617015] [2024-06-03 19:25:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:33,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:34,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:34,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272617015] [2024-06-03 19:25:34,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272617015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:34,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:34,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:34,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695022089] [2024-06-03 19:25:34,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:34,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:34,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:34,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:34,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 228 transitions, 2490 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) [2024-06-03 19:25:34,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:34,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:34,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:36,509 INFO L124 PetriNetUnfolderBase]: 10344/14475 cut-off events. [2024-06-03 19:25:36,510 INFO L125 PetriNetUnfolderBase]: For 373251/373262 co-relation queries the response was YES. [2024-06-03 19:25:36,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89080 conditions, 14475 events. 10344/14475 cut-off events. For 373251/373262 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 79600 event pairs, 3917 based on Foata normal form. 12/14482 useless extension candidates. Maximal degree in co-relation 89023. Up to 13765 conditions per place. [2024-06-03 19:25:36,621 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 190 selfloop transitions, 74 changer transitions 0/271 dead transitions. [2024-06-03 19:25:36,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 271 transitions, 3212 flow [2024-06-03 19:25:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:25:36,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-03 19:25:36,622 INFO L175 Difference]: Start difference. First operand has 140 places, 228 transitions, 2490 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:25:36,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 271 transitions, 3212 flow [2024-06-03 19:25:36,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 271 transitions, 3134 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-03 19:25:36,903 INFO L231 Difference]: Finished difference. Result has 146 places, 231 transitions, 2646 flow [2024-06-03 19:25:36,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2646, PETRI_PLACES=146, PETRI_TRANSITIONS=231} [2024-06-03 19:25:36,904 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-03 19:25:36,904 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 231 transitions, 2646 flow [2024-06-03 19:25:36,904 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) [2024-06-03 19:25:36,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:36,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:36,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:25:36,904 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:36,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:36,905 INFO L85 PathProgramCache]: Analyzing trace with hash 541341520, now seen corresponding path program 1 times [2024-06-03 19:25:36,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:36,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049983684] [2024-06-03 19:25:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:36,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:37,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:37,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049983684] [2024-06-03 19:25:37,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049983684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:37,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:37,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:37,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088563576] [2024-06-03 19:25:37,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:37,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:37,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:37,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:37,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 231 transitions, 2646 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) [2024-06-03 19:25:37,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:37,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:37,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:40,231 INFO L124 PetriNetUnfolderBase]: 10541/14764 cut-off events. [2024-06-03 19:25:40,231 INFO L125 PetriNetUnfolderBase]: For 421869/421881 co-relation queries the response was YES. [2024-06-03 19:25:40,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93006 conditions, 14764 events. 10541/14764 cut-off events. For 421869/421881 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 81583 event pairs, 3818 based on Foata normal form. 38/14785 useless extension candidates. Maximal degree in co-relation 92947. Up to 13611 conditions per place. [2024-06-03 19:25:40,378 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 222 selfloop transitions, 62 changer transitions 0/291 dead transitions. [2024-06-03 19:25:40,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 291 transitions, 3754 flow [2024-06-03 19:25:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-03 19:25:40,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2024-06-03 19:25:40,380 INFO L175 Difference]: Start difference. First operand has 146 places, 231 transitions, 2646 flow. Second operand 8 states and 226 transitions. [2024-06-03 19:25:40,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 291 transitions, 3754 flow [2024-06-03 19:25:40,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 291 transitions, 3546 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:25:40,731 INFO L231 Difference]: Finished difference. Result has 148 places, 234 transitions, 2645 flow [2024-06-03 19:25:40,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2438, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2645, PETRI_PLACES=148, PETRI_TRANSITIONS=234} [2024-06-03 19:25:40,732 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-03 19:25:40,732 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 234 transitions, 2645 flow [2024-06-03 19:25:40,732 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) [2024-06-03 19:25:40,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:40,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:40,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:25:40,733 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)] === [2024-06-03 19:25:40,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:40,733 INFO L85 PathProgramCache]: Analyzing trace with hash -676627564, now seen corresponding path program 1 times [2024-06-03 19:25:40,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:40,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301553043] [2024-06-03 19:25:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:40,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301553043] [2024-06-03 19:25:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301553043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:41,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:41,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:25:41,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187860055] [2024-06-03 19:25:41,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:41,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:25:41,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:41,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:25:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:25:41,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:25:41,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 234 transitions, 2645 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) [2024-06-03 19:25:41,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:41,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:25:41,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:43,748 INFO L124 PetriNetUnfolderBase]: 9994/14230 cut-off events. [2024-06-03 19:25:43,749 INFO L125 PetriNetUnfolderBase]: For 442502/442567 co-relation queries the response was YES. [2024-06-03 19:25:43,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92720 conditions, 14230 events. 9994/14230 cut-off events. For 442502/442567 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 81275 event pairs, 3817 based on Foata normal form. 49/14265 useless extension candidates. Maximal degree in co-relation 92660. Up to 13283 conditions per place. [2024-06-03 19:25:43,898 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 193 selfloop transitions, 54 changer transitions 0/268 dead transitions. [2024-06-03 19:25:43,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 268 transitions, 3416 flow [2024-06-03 19:25:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:25:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:25:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-03 19:25:43,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-03 19:25:43,899 INFO L175 Difference]: Start difference. First operand has 148 places, 234 transitions, 2645 flow. Second operand 6 states and 163 transitions. [2024-06-03 19:25:43,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 268 transitions, 3416 flow [2024-06-03 19:25:44,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 268 transitions, 3239 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:25:44,372 INFO L231 Difference]: Finished difference. Result has 148 places, 241 transitions, 2694 flow [2024-06-03 19:25:44,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2694, PETRI_PLACES=148, PETRI_TRANSITIONS=241} [2024-06-03 19:25:44,373 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-03 19:25:44,373 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 241 transitions, 2694 flow [2024-06-03 19:25:44,373 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) [2024-06-03 19:25:44,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:44,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:44,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:25:44,373 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:44,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:44,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1277912344, now seen corresponding path program 4 times [2024-06-03 19:25:44,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:44,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904917426] [2024-06-03 19:25:44,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:44,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:45,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:45,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904917426] [2024-06-03 19:25:45,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904917426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:45,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:45,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:45,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56255579] [2024-06-03 19:25:45,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:45,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:45,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:45,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:45,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:45,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:45,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 241 transitions, 2694 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) [2024-06-03 19:25:45,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:45,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:45,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:47,553 INFO L124 PetriNetUnfolderBase]: 10590/14843 cut-off events. [2024-06-03 19:25:47,554 INFO L125 PetriNetUnfolderBase]: For 466500/466502 co-relation queries the response was YES. [2024-06-03 19:25:47,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95915 conditions, 14843 events. 10590/14843 cut-off events. For 466500/466502 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 82136 event pairs, 3925 based on Foata normal form. 6/14831 useless extension candidates. Maximal degree in co-relation 95854. Up to 14111 conditions per place. [2024-06-03 19:25:47,714 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 202 selfloop transitions, 73 changer transitions 0/282 dead transitions. [2024-06-03 19:25:47,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 282 transitions, 3442 flow [2024-06-03 19:25:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-03 19:25:47,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-03 19:25:47,717 INFO L175 Difference]: Start difference. First operand has 148 places, 241 transitions, 2694 flow. Second operand 8 states and 204 transitions. [2024-06-03 19:25:47,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 282 transitions, 3442 flow [2024-06-03 19:25:48,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 282 transitions, 3347 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 19:25:48,050 INFO L231 Difference]: Finished difference. Result has 153 places, 244 transitions, 2841 flow [2024-06-03 19:25:48,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2841, PETRI_PLACES=153, PETRI_TRANSITIONS=244} [2024-06-03 19:25:48,050 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-03 19:25:48,050 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 244 transitions, 2841 flow [2024-06-03 19:25:48,051 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) [2024-06-03 19:25:48,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:48,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:48,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:25:48,051 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:48,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:48,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1277727646, now seen corresponding path program 2 times [2024-06-03 19:25:48,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:48,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497877158] [2024-06-03 19:25:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:48,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:48,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:48,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497877158] [2024-06-03 19:25:48,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497877158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:48,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:48,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:48,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297458627] [2024-06-03 19:25:48,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:48,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:48,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:48,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:49,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:49,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 244 transitions, 2841 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) [2024-06-03 19:25:49,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:49,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:49,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:51,397 INFO L124 PetriNetUnfolderBase]: 10787/15139 cut-off events. [2024-06-03 19:25:51,397 INFO L125 PetriNetUnfolderBase]: For 520374/520398 co-relation queries the response was YES. [2024-06-03 19:25:51,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99936 conditions, 15139 events. 10787/15139 cut-off events. For 520374/520398 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 84163 event pairs, 3757 based on Foata normal form. 42/15165 useless extension candidates. Maximal degree in co-relation 99874. Up to 13934 conditions per place. [2024-06-03 19:25:51,568 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 231 selfloop transitions, 64 changer transitions 0/302 dead transitions. [2024-06-03 19:25:51,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 302 transitions, 4011 flow [2024-06-03 19:25:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-03 19:25:51,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-03 19:25:51,572 INFO L175 Difference]: Start difference. First operand has 153 places, 244 transitions, 2841 flow. Second operand 8 states and 222 transitions. [2024-06-03 19:25:51,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 302 transitions, 4011 flow [2024-06-03 19:25:52,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 302 transitions, 3795 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-03 19:25:52,058 INFO L231 Difference]: Finished difference. Result has 155 places, 247 transitions, 2846 flow [2024-06-03 19:25:52,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2625, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2846, PETRI_PLACES=155, PETRI_TRANSITIONS=247} [2024-06-03 19:25:52,059 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 99 predicate places. [2024-06-03 19:25:52,059 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 247 transitions, 2846 flow [2024-06-03 19:25:52,059 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) [2024-06-03 19:25:52,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:52,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:52,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:25:52,060 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:52,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1041552286, now seen corresponding path program 3 times [2024-06-03 19:25:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:52,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718577517] [2024-06-03 19:25:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:52,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:52,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:52,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718577517] [2024-06-03 19:25:52,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718577517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:52,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:52,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914628626] [2024-06-03 19:25:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:52,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:52,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:52,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:52,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:53,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:53,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 247 transitions, 2846 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) [2024-06-03 19:25:53,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:53,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:53,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:55,531 INFO L124 PetriNetUnfolderBase]: 10984/15406 cut-off events. [2024-06-03 19:25:55,531 INFO L125 PetriNetUnfolderBase]: For 564738/564762 co-relation queries the response was YES. [2024-06-03 19:25:55,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104248 conditions, 15406 events. 10984/15406 cut-off events. For 564738/564762 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 85762 event pairs, 3757 based on Foata normal form. 42/15432 useless extension candidates. Maximal degree in co-relation 104185. Up to 14217 conditions per place. [2024-06-03 19:25:55,705 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 227 selfloop transitions, 69 changer transitions 0/303 dead transitions. [2024-06-03 19:25:55,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 303 transitions, 3920 flow [2024-06-03 19:25:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-03 19:25:55,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-03 19:25:55,707 INFO L175 Difference]: Start difference. First operand has 155 places, 247 transitions, 2846 flow. Second operand 8 states and 220 transitions. [2024-06-03 19:25:55,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 303 transitions, 3920 flow [2024-06-03 19:25:56,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 303 transitions, 3735 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:25:56,245 INFO L231 Difference]: Finished difference. Result has 157 places, 250 transitions, 2898 flow [2024-06-03 19:25:56,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2898, PETRI_PLACES=157, PETRI_TRANSITIONS=250} [2024-06-03 19:25:56,246 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2024-06-03 19:25:56,246 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 250 transitions, 2898 flow [2024-06-03 19:25:56,246 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) [2024-06-03 19:25:56,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:56,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:56,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:25:56,246 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:56,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:56,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1041255616, now seen corresponding path program 4 times [2024-06-03 19:25:56,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:56,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071508790] [2024-06-03 19:25:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:56,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:57,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:57,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071508790] [2024-06-03 19:25:57,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071508790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:57,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:57,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:57,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579478817] [2024-06-03 19:25:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:57,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:57,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:57,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:57,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:57,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 250 transitions, 2898 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) [2024-06-03 19:25:57,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:57,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:57,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:59,759 INFO L124 PetriNetUnfolderBase]: 11130/15616 cut-off events. [2024-06-03 19:25:59,759 INFO L125 PetriNetUnfolderBase]: For 601166/601190 co-relation queries the response was YES. [2024-06-03 19:25:59,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107137 conditions, 15616 events. 11130/15616 cut-off events. For 601166/601190 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 87056 event pairs, 3510 based on Foata normal form. 42/15642 useless extension candidates. Maximal degree in co-relation 107073. Up to 13642 conditions per place. [2024-06-03 19:25:59,922 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 223 selfloop transitions, 80 changer transitions 0/310 dead transitions. [2024-06-03 19:25:59,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 310 transitions, 4020 flow [2024-06-03 19:25:59,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:25:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:25:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-03 19:25:59,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259433962264151 [2024-06-03 19:25:59,924 INFO L175 Difference]: Start difference. First operand has 157 places, 250 transitions, 2898 flow. Second operand 8 states and 223 transitions. [2024-06-03 19:25:59,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 310 transitions, 4020 flow [2024-06-03 19:26:00,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 310 transitions, 3819 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:26:00,415 INFO L231 Difference]: Finished difference. Result has 159 places, 253 transitions, 2961 flow [2024-06-03 19:26:00,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2961, PETRI_PLACES=159, PETRI_TRANSITIONS=253} [2024-06-03 19:26:00,416 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-03 19:26:00,416 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 253 transitions, 2961 flow [2024-06-03 19:26:00,416 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) [2024-06-03 19:26:00,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:00,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:00,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:26:00,416 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)] === [2024-06-03 19:26:00,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:00,417 INFO L85 PathProgramCache]: Analyzing trace with hash 194193746, now seen corresponding path program 2 times [2024-06-03 19:26:00,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:00,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104196437] [2024-06-03 19:26:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:00,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:01,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104196437] [2024-06-03 19:26:01,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104196437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:01,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:01,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:26:01,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846934582] [2024-06-03 19:26:01,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:01,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:26:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:01,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:26:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:26:01,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:26:01,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 253 transitions, 2961 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) [2024-06-03 19:26:01,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:01,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:26:01,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:04,108 INFO L124 PetriNetUnfolderBase]: 10376/14828 cut-off events. [2024-06-03 19:26:04,108 INFO L125 PetriNetUnfolderBase]: For 613846/613880 co-relation queries the response was YES. [2024-06-03 19:26:04,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103307 conditions, 14828 events. 10376/14828 cut-off events. For 613846/613880 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 85922 event pairs, 3951 based on Foata normal form. 32/14830 useless extension candidates. Maximal degree in co-relation 103242. Up to 13782 conditions per place. [2024-06-03 19:26:04,249 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 195 selfloop transitions, 53 changer transitions 0/272 dead transitions. [2024-06-03 19:26:04,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 272 transitions, 3513 flow [2024-06-03 19:26:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:26:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:26:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 19:26:04,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-03 19:26:04,250 INFO L175 Difference]: Start difference. First operand has 159 places, 253 transitions, 2961 flow. Second operand 6 states and 154 transitions. [2024-06-03 19:26:04,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 272 transitions, 3513 flow [2024-06-03 19:26:04,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 272 transitions, 3255 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:26:04,872 INFO L231 Difference]: Finished difference. Result has 159 places, 253 transitions, 2821 flow [2024-06-03 19:26:04,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2821, PETRI_PLACES=159, PETRI_TRANSITIONS=253} [2024-06-03 19:26:04,872 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-03 19:26:04,872 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 253 transitions, 2821 flow [2024-06-03 19:26:04,872 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) [2024-06-03 19:26:04,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:04,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:04,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:26:04,873 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:04,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:04,873 INFO L85 PathProgramCache]: Analyzing trace with hash -600201228, now seen corresponding path program 5 times [2024-06-03 19:26:04,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:04,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118821776] [2024-06-03 19:26:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:04,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:05,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:05,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118821776] [2024-06-03 19:26:05,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118821776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:05,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:05,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:26:05,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152618187] [2024-06-03 19:26:05,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:05,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:26:05,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:05,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:26:05,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:26:05,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:26:05,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 253 transitions, 2821 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) [2024-06-03 19:26:05,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:05,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:26:05,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:08,373 INFO L124 PetriNetUnfolderBase]: 11288/15849 cut-off events. [2024-06-03 19:26:08,373 INFO L125 PetriNetUnfolderBase]: For 646357/646369 co-relation queries the response was YES. [2024-06-03 19:26:08,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109559 conditions, 15849 events. 11288/15849 cut-off events. For 646357/646369 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 88732 event pairs, 4029 based on Foata normal form. 18/15864 useless extension candidates. Maximal degree in co-relation 109493. Up to 15122 conditions per place. [2024-06-03 19:26:08,511 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 247 selfloop transitions, 102 changer transitions 0/356 dead transitions. [2024-06-03 19:26:08,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 356 transitions, 4297 flow [2024-06-03 19:26:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:26:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:26:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-06-03 19:26:08,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4751286449399657 [2024-06-03 19:26:08,514 INFO L175 Difference]: Start difference. First operand has 159 places, 253 transitions, 2821 flow. Second operand 11 states and 277 transitions. [2024-06-03 19:26:08,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 356 transitions, 4297 flow [2024-06-03 19:26:08,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 356 transitions, 4121 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 19:26:08,941 INFO L231 Difference]: Finished difference. Result has 167 places, 298 transitions, 3530 flow [2024-06-03 19:26:08,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3530, PETRI_PLACES=167, PETRI_TRANSITIONS=298} [2024-06-03 19:26:08,941 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-03 19:26:08,941 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 298 transitions, 3530 flow [2024-06-03 19:26:08,941 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) [2024-06-03 19:26:08,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:08,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:08,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:26:08,942 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:08,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:08,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2012150816, now seen corresponding path program 6 times [2024-06-03 19:26:08,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:08,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131200586] [2024-06-03 19:26:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:08,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:09,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:09,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131200586] [2024-06-03 19:26:09,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131200586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:09,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:09,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:26:09,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117998040] [2024-06-03 19:26:09,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:09,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:26:09,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:09,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:26:09,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:26:09,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:26:09,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 298 transitions, 3530 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) [2024-06-03 19:26:09,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:09,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:26:09,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:12,883 INFO L124 PetriNetUnfolderBase]: 11350/15951 cut-off events. [2024-06-03 19:26:12,883 INFO L125 PetriNetUnfolderBase]: For 675358/675364 co-relation queries the response was YES. [2024-06-03 19:26:12,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111854 conditions, 15951 events. 11350/15951 cut-off events. For 675358/675364 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 89470 event pairs, 4034 based on Foata normal form. 12/15960 useless extension candidates. Maximal degree in co-relation 111785. Up to 15222 conditions per place. [2024-06-03 19:26:13,034 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 258 selfloop transitions, 89 changer transitions 0/354 dead transitions. [2024-06-03 19:26:13,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 354 transitions, 4522 flow [2024-06-03 19:26:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:26:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:26:13,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-03 19:26:13,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-03 19:26:13,035 INFO L175 Difference]: Start difference. First operand has 167 places, 298 transitions, 3530 flow. Second operand 9 states and 231 transitions. [2024-06-03 19:26:13,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 354 transitions, 4522 flow [2024-06-03 19:26:13,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 354 transitions, 4224 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-03 19:26:13,619 INFO L231 Difference]: Finished difference. Result has 170 places, 307 transitions, 3570 flow [2024-06-03 19:26:13,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3570, PETRI_PLACES=170, PETRI_TRANSITIONS=307} [2024-06-03 19:26:13,620 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2024-06-03 19:26:13,620 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 307 transitions, 3570 flow [2024-06-03 19:26:13,620 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) [2024-06-03 19:26:13,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:13,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:13,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:26:13,620 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)] === [2024-06-03 19:26:13,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:13,621 INFO L85 PathProgramCache]: Analyzing trace with hash -670907692, now seen corresponding path program 1 times [2024-06-03 19:26:13,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:13,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015225892] [2024-06-03 19:26:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:13,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:14,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:14,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015225892] [2024-06-03 19:26:14,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015225892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:14,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:14,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:26:14,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653391067] [2024-06-03 19:26:14,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:14,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:26:14,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:26:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:26:14,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:26:14,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 307 transitions, 3570 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) [2024-06-03 19:26:14,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:14,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:26:14,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:16,925 INFO L124 PetriNetUnfolderBase]: 10218/14777 cut-off events. [2024-06-03 19:26:16,925 INFO L125 PetriNetUnfolderBase]: For 606089/606089 co-relation queries the response was YES. [2024-06-03 19:26:17,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101609 conditions, 14777 events. 10218/14777 cut-off events. For 606089/606089 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 86381 event pairs, 3530 based on Foata normal form. 8/14746 useless extension candidates. Maximal degree in co-relation 101539. Up to 13814 conditions per place. [2024-06-03 19:26:17,076 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 302 selfloop transitions, 26 changer transitions 0/336 dead transitions. [2024-06-03 19:26:17,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 336 transitions, 4499 flow [2024-06-03 19:26:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:26:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:26:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-03 19:26:17,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-03 19:26:17,077 INFO L175 Difference]: Start difference. First operand has 170 places, 307 transitions, 3570 flow. Second operand 6 states and 162 transitions. [2024-06-03 19:26:17,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 336 transitions, 4499 flow [2024-06-03 19:26:17,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 336 transitions, 4293 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:26:17,676 INFO L231 Difference]: Finished difference. Result has 168 places, 311 transitions, 3478 flow [2024-06-03 19:26:17,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3478, PETRI_PLACES=168, PETRI_TRANSITIONS=311} [2024-06-03 19:26:17,677 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 112 predicate places. [2024-06-03 19:26:17,677 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 311 transitions, 3478 flow [2024-06-03 19:26:17,677 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) [2024-06-03 19:26:17,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:17,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:17,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:26:17,677 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:17,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash 193680758, now seen corresponding path program 2 times [2024-06-03 19:26:17,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:17,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254507078] [2024-06-03 19:26:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:17,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:18,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:18,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254507078] [2024-06-03 19:26:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254507078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:18,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:18,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:26:18,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577760851] [2024-06-03 19:26:18,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:18,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:26:18,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:18,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:26:18,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:26:18,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:26:18,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 311 transitions, 3478 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) [2024-06-03 19:26:18,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:18,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:26:18,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:21,028 INFO L124 PetriNetUnfolderBase]: 10066/14503 cut-off events. [2024-06-03 19:26:21,028 INFO L125 PetriNetUnfolderBase]: For 624931/624931 co-relation queries the response was YES. [2024-06-03 19:26:21,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101009 conditions, 14503 events. 10066/14503 cut-off events. For 624931/624931 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 83987 event pairs, 3444 based on Foata normal form. 4/14470 useless extension candidates. Maximal degree in co-relation 100938. Up to 13598 conditions per place. [2024-06-03 19:26:21,161 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 296 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-03 19:26:21,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 331 transitions, 4198 flow [2024-06-03 19:26:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:26:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:26:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-03 19:26:21,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-03 19:26:21,163 INFO L175 Difference]: Start difference. First operand has 168 places, 311 transitions, 3478 flow. Second operand 6 states and 158 transitions. [2024-06-03 19:26:21,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 331 transitions, 4198 flow [2024-06-03 19:26:21,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 331 transitions, 4145 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 19:26:21,689 INFO L231 Difference]: Finished difference. Result has 171 places, 311 transitions, 3488 flow [2024-06-03 19:26:21,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3488, PETRI_PLACES=171, PETRI_TRANSITIONS=311} [2024-06-03 19:26:21,689 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 115 predicate places. [2024-06-03 19:26:21,689 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 311 transitions, 3488 flow [2024-06-03 19:26:21,690 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) [2024-06-03 19:26:21,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:21,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:21,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:26:21,690 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:21,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash 316934332, now seen corresponding path program 1 times [2024-06-03 19:26:21,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:21,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396107125] [2024-06-03 19:26:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:21,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:22,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396107125] [2024-06-03 19:26:22,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396107125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:22,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:22,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:22,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116720720] [2024-06-03 19:26:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:23,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:26:23,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 311 transitions, 3488 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:23,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:23,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:26:23,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:26:26,432 INFO L124 PetriNetUnfolderBase]: 12855/18357 cut-off events. [2024-06-03 19:26:26,432 INFO L125 PetriNetUnfolderBase]: For 936814/936816 co-relation queries the response was YES. [2024-06-03 19:26:26,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132022 conditions, 18357 events. 12855/18357 cut-off events. For 936814/936816 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 109196 event pairs, 3965 based on Foata normal form. 80/18417 useless extension candidates. Maximal degree in co-relation 131950. Up to 15036 conditions per place. [2024-06-03 19:26:26,605 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 301 selfloop transitions, 96 changer transitions 0/404 dead transitions. [2024-06-03 19:26:26,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 404 transitions, 5253 flow [2024-06-03 19:26:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:26:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:26:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2024-06-03 19:26:26,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075471698113208 [2024-06-03 19:26:26,606 INFO L175 Difference]: Start difference. First operand has 171 places, 311 transitions, 3488 flow. Second operand 10 states and 269 transitions. [2024-06-03 19:26:26,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 404 transitions, 5253 flow [2024-06-03 19:26:27,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 404 transitions, 5167 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:26:27,235 INFO L231 Difference]: Finished difference. Result has 178 places, 331 transitions, 3981 flow [2024-06-03 19:26:27,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3981, PETRI_PLACES=178, PETRI_TRANSITIONS=331} [2024-06-03 19:26:27,236 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 122 predicate places. [2024-06-03 19:26:27,236 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 331 transitions, 3981 flow [2024-06-03 19:26:27,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:27,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:26:27,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:26:27,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:26:27,237 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:26:27,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:26:27,237 INFO L85 PathProgramCache]: Analyzing trace with hash 316938052, now seen corresponding path program 2 times [2024-06-03 19:26:27,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:26:27,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814236453] [2024-06-03 19:26:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:26:27,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:26:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:26:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:26:28,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:26:28,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814236453] [2024-06-03 19:26:28,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814236453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:26:28,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:26:28,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:26:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484819290] [2024-06-03 19:26:28,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:26:28,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:26:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:26:28,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:26:28,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:26:28,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:26:28,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 331 transitions, 3981 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:26:28,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:26:28,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:26:28,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand