./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix037_power.oepc_pso.oepc_rmo.oepc.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/mix037_power.oepc_pso.oepc_rmo.oepc.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/mix037_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix037_power.oepc_pso.oepc_rmo.oepc.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 19:43:55,232 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:43:55,296 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:43:55,301 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:43:55,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:43:55,323 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:43:55,324 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:43:55,324 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:43:55,324 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:43:55,327 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:43:55,328 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:43:55,328 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:43:55,329 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:43:55,329 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:43:55,330 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:43:55,330 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:43:55,330 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:43:55,330 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:43:55,330 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:43:55,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:43:55,331 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:43:55,331 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:43:55,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:43:55,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:43:55,332 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:43:55,332 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:43:55,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:43:55,332 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:43:55,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:43:55,333 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:43:55,334 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:43:55,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:43:55,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:43:55,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:43:55,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:43:55,335 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:43:55,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:43:55,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:43:55,335 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:43:55,335 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:43:55,335 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:43:55,336 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:43:55,336 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:43:55,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:43:55,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:43:55,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:43:55,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:43:55,530 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:43:55,531 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:43:55,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix037_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-03 19:43:55,710 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:43:55,711 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:43:55,711 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix037_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:43:56,595 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:43:56,786 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:43:56,786 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix037_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:43:56,801 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83dd169b1/baa2fd4ce63f4663a255905fc48b8d3d/FLAG7798bbd4c [2024-06-03 19:43:57,167 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83dd169b1/baa2fd4ce63f4663a255905fc48b8d3d [2024-06-03 19:43:57,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:43:57,170 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:43:57,172 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:43:57,172 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:43:57,175 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:43:57,176 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:43:55" (1/2) ... [2024-06-03 19:43:57,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2675f7a3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:43:57, skipping insertion in model container [2024-06-03 19:43:57,177 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:43:55" (1/2) ... [2024-06-03 19:43:57,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@77f0c30c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:43:57, skipping insertion in model container [2024-06-03 19:43:57,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:43:57" (2/2) ... [2024-06-03 19:43:57,179 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2675f7a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57, skipping insertion in model container [2024-06-03 19:43:57,179 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:43:57" (2/2) ... [2024-06-03 19:43:57,180 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:43:57,277 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:43:57,278 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1))) [2024-06-03 19:43:57,278 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1))) [2024-06-03 19:43:57,279 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] (((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1))) [2024-06-03 19:43:57,279 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] (((((((((((((((((((((((! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1))) [2024-06-03 19:43:57,279 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:43:57,279 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-03 19:43:57,315 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:43:57,619 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:43:57,627 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 19:43:57,728 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:43:57,772 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:43:57,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57 WrapperNode [2024-06-03 19:43:57,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:43:57,774 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:43:57,774 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:43:57,774 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:43:57,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,805 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,831 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 140 [2024-06-03 19:43:57,843 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:43:57,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:43:57,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:43:57,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:43:57,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,861 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,877 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 19:43:57,882 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,883 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,893 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,905 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,906 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,913 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,916 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:43:57,917 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:43:57,917 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:43:57,917 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:43:57,918 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (1/1) ... [2024-06-03 19:43:57,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:43:57,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:43:57,947 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 19:43:57,966 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 19:43:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:43:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:43:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:43:57,978 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:43:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:43:57,979 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:43:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:43:57,979 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:43:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:43:57,979 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:43:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:43:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:43:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:43:57,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:43:57,982 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 19:43:58,099 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:43:58,101 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:43:58,469 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:43:58,469 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:43:58,633 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:43:58,640 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:43:58,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:43:58 BoogieIcfgContainer [2024-06-03 19:43:58,640 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:43:58,642 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:43:58,662 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:43:58,665 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:43:58,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:43:55" (1/4) ... [2024-06-03 19:43:58,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73569673 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:43:58, skipping insertion in model container [2024-06-03 19:43:58,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:43:57" (2/4) ... [2024-06-03 19:43:58,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73569673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:43:58, skipping insertion in model container [2024-06-03 19:43:58,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:43:57" (3/4) ... [2024-06-03 19:43:58,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73569673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:43:58, skipping insertion in model container [2024-06-03 19:43:58,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:43:58" (4/4) ... [2024-06-03 19:43:58,667 INFO L112 eAbstractionObserver]: Analyzing ICFG mix037_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 19:43:58,680 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:43:58,681 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:43:58,681 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:43:58,727 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:43:58,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:43:58,783 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-03 19:43:58,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:43:58,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:43:58,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:43:58,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-03 19:43:58,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:43:58,806 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;@5f09b8df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:43:58,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:43:58,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:43:58,811 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:43:58,811 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:43:58,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:58,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:43:58,812 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 19:43:58,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash -271933375, now seen corresponding path program 1 times [2024-06-03 19:43:58,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:58,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469156711] [2024-06-03 19:43:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:59,848 INFO 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 19:43:59,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:59,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469156711] [2024-06-03 19:43:59,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469156711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:59,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:59,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:43:59,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331387303] [2024-06-03 19:43:59,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:59,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:43:59,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:59,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:43:59,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:43:59,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:59,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 19:43:59,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:59,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:59,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:01,643 INFO L124 PetriNetUnfolderBase]: 10982/15279 cut-off events. [2024-06-03 19:44:01,643 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-03 19:44:01,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30534 conditions, 15279 events. 10982/15279 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 84109 event pairs, 8614 based on Foata normal form. 1/14913 useless extension candidates. Maximal degree in co-relation 30518. Up to 14862 conditions per place. [2024-06-03 19:44:01,728 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 46 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-03 19:44:01,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 239 flow [2024-06-03 19:44:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:44:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:44:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-03 19:44:01,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987654320987654 [2024-06-03 19:44:01,738 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 97 transitions. [2024-06-03 19:44:01,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 239 flow [2024-06-03 19:44:01,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:01,743 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-03 19:44:01,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-03 19:44:01,746 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-03 19:44:01,746 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-03 19:44:01,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 19:44:01,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:01,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:01,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:44:01,747 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 19:44:01,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:01,748 INFO L85 PathProgramCache]: Analyzing trace with hash 665090272, now seen corresponding path program 1 times [2024-06-03 19:44:01,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:01,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604489301] [2024-06-03 19:44:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:01,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:02,595 INFO 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 19:44:02,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:02,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604489301] [2024-06-03 19:44:02,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604489301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:02,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:02,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:44:02,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104558075] [2024-06-03 19:44:02,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:02,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:44:02,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:44:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:44:02,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:02,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 19:44:02,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:02,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:02,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:04,175 INFO L124 PetriNetUnfolderBase]: 10972/15273 cut-off events. [2024-06-03 19:44:04,176 INFO L125 PetriNetUnfolderBase]: For 2791/2791 co-relation queries the response was YES. [2024-06-03 19:44:04,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34374 conditions, 15273 events. 10972/15273 cut-off events. For 2791/2791 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 83974 event pairs, 7834 based on Foata normal form. 4/15093 useless extension candidates. Maximal degree in co-relation 34359. Up to 14827 conditions per place. [2024-06-03 19:44:04,254 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 56 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-03 19:44:04,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 331 flow [2024-06-03 19:44:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:44:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:44:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-03 19:44:04,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-06-03 19:44:04,258 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 125 transitions. [2024-06-03 19:44:04,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 331 flow [2024-06-03 19:44:04,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:44:04,264 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-03 19:44:04,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-03 19:44:04,265 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-03 19:44:04,265 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-03 19:44:04,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 19:44:04,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:04,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:04,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:44:04,268 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 19:44:04,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:04,273 INFO L85 PathProgramCache]: Analyzing trace with hash -857036156, now seen corresponding path program 1 times [2024-06-03 19:44:04,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:04,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159542] [2024-06-03 19:44:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:04,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:05,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159542] [2024-06-03 19:44:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:05,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:05,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:44:05,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797970471] [2024-06-03 19:44:05,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:05,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:44:05,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:05,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:44:05,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:44:05,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:05,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:05,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:05,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:05,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:06,660 INFO L124 PetriNetUnfolderBase]: 11080/15481 cut-off events. [2024-06-03 19:44:06,661 INFO L125 PetriNetUnfolderBase]: For 8256/8256 co-relation queries the response was YES. [2024-06-03 19:44:06,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38677 conditions, 15481 events. 11080/15481 cut-off events. For 8256/8256 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 85865 event pairs, 6374 based on Foata normal form. 10/15306 useless extension candidates. Maximal degree in co-relation 38660. Up to 14800 conditions per place. [2024-06-03 19:44:06,744 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 76 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2024-06-03 19:44:06,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 104 transitions, 555 flow [2024-06-03 19:44:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:44:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:44:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-03 19:44:06,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-03 19:44:06,746 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 165 transitions. [2024-06-03 19:44:06,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 104 transitions, 555 flow [2024-06-03 19:44:06,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 536 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 19:44:06,749 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 316 flow [2024-06-03 19:44:06,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-03 19:44:06,751 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-03 19:44:06,751 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 316 flow [2024-06-03 19:44:06,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:06,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:06,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:06,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:44:06,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:06,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash -798315137, now seen corresponding path program 1 times [2024-06-03 19:44:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:06,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938554436] [2024-06-03 19:44:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:06,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:08,095 INFO 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 19:44:08,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:08,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938554436] [2024-06-03 19:44:08,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938554436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:08,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:08,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:44:08,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202416251] [2024-06-03 19:44:08,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:08,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:44:08,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:08,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:44:08,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:44:08,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:08,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 316 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 19:44:08,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:08,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:08,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:09,714 INFO L124 PetriNetUnfolderBase]: 11126/15528 cut-off events. [2024-06-03 19:44:09,714 INFO L125 PetriNetUnfolderBase]: For 19919/19919 co-relation queries the response was YES. [2024-06-03 19:44:09,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45829 conditions, 15528 events. 11126/15528 cut-off events. For 19919/19919 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 85884 event pairs, 5544 based on Foata normal form. 10/15353 useless extension candidates. Maximal degree in co-relation 45809. Up to 14796 conditions per place. [2024-06-03 19:44:09,785 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 87 selfloop transitions, 26 changer transitions 0/120 dead transitions. [2024-06-03 19:44:09,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 120 transitions, 736 flow [2024-06-03 19:44:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:44:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:44:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-03 19:44:09,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2024-06-03 19:44:09,787 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 316 flow. Second operand 6 states and 195 transitions. [2024-06-03 19:44:09,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 120 transitions, 736 flow [2024-06-03 19:44:09,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 120 transitions, 724 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-03 19:44:09,795 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 410 flow [2024-06-03 19:44:09,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-03 19:44:09,795 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-03 19:44:09,796 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 410 flow [2024-06-03 19:44:09,796 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 19:44:09,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:09,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:09,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:44:09,796 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:09,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:09,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1022036483, now seen corresponding path program 1 times [2024-06-03 19:44:09,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:09,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104698705] [2024-06-03 19:44:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:09,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:11,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104698705] [2024-06-03 19:44:11,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104698705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:11,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:11,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:44:11,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477824656] [2024-06-03 19:44:11,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:11,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:44:11,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:44:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:44:11,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:11,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 19:44:11,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:11,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:11,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:12,773 INFO L124 PetriNetUnfolderBase]: 11358/15886 cut-off events. [2024-06-03 19:44:12,774 INFO L125 PetriNetUnfolderBase]: For 32319/32319 co-relation queries the response was YES. [2024-06-03 19:44:12,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51939 conditions, 15886 events. 11358/15886 cut-off events. For 32319/32319 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 88281 event pairs, 4656 based on Foata normal form. 44/15745 useless extension candidates. Maximal degree in co-relation 51916. Up to 14806 conditions per place. [2024-06-03 19:44:12,844 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 99 selfloop transitions, 29 changer transitions 0/135 dead transitions. [2024-06-03 19:44:12,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 135 transitions, 902 flow [2024-06-03 19:44:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-03 19:44:12,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-03 19:44:12,846 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 410 flow. Second operand 7 states and 224 transitions. [2024-06-03 19:44:12,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 135 transitions, 902 flow [2024-06-03 19:44:12,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 135 transitions, 836 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:12,856 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 440 flow [2024-06-03 19:44:12,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=440, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-03 19:44:12,857 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-03 19:44:12,857 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 440 flow [2024-06-03 19:44:12,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 19:44:12,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:12,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:12,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:44:12,858 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 19:44:12,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:12,858 INFO L85 PathProgramCache]: Analyzing trace with hash -267076518, now seen corresponding path program 1 times [2024-06-03 19:44:12,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:12,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500110710] [2024-06-03 19:44:12,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:12,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:13,526 INFO 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 19:44:13,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:13,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500110710] [2024-06-03 19:44:13,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500110710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:13,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:13,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:44:13,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632183466] [2024-06-03 19:44:13,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:13,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:44:13,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:13,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:44:13,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:44:13,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:44:13,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 440 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 19:44:13,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:13,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:44:13,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:15,156 INFO L124 PetriNetUnfolderBase]: 11340/15873 cut-off events. [2024-06-03 19:44:15,156 INFO L125 PetriNetUnfolderBase]: For 43198/43198 co-relation queries the response was YES. [2024-06-03 19:44:15,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55063 conditions, 15873 events. 11340/15873 cut-off events. For 43198/43198 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 88288 event pairs, 5463 based on Foata normal form. 6/15699 useless extension candidates. Maximal degree in co-relation 55039. Up to 15362 conditions per place. [2024-06-03 19:44:15,253 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 74 selfloop transitions, 13 changer transitions 0/94 dead transitions. [2024-06-03 19:44:15,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 694 flow [2024-06-03 19:44:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:44:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:44:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 19:44:15,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 19:44:15,255 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 440 flow. Second operand 5 states and 130 transitions. [2024-06-03 19:44:15,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 694 flow [2024-06-03 19:44:15,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 624 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:15,272 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 454 flow [2024-06-03 19:44:15,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2024-06-03 19:44:15,273 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-03 19:44:15,273 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 454 flow [2024-06-03 19:44:15,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 19:44:15,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:15,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:15,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:44:15,274 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 19:44:15,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1369443207, now seen corresponding path program 1 times [2024-06-03 19:44:15,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:15,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176964443] [2024-06-03 19:44:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:15,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:16,282 INFO 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 19:44:16,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176964443] [2024-06-03 19:44:16,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176964443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:16,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:16,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:44:16,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322005213] [2024-06-03 19:44:16,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:16,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:44:16,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:44:16,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:44:16,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:44:16,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 454 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 19:44:16,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:16,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:44:16,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:18,209 INFO L124 PetriNetUnfolderBase]: 11366/15896 cut-off events. [2024-06-03 19:44:18,209 INFO L125 PetriNetUnfolderBase]: For 55569/55569 co-relation queries the response was YES. [2024-06-03 19:44:18,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58249 conditions, 15896 events. 11366/15896 cut-off events. For 55569/55569 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 88233 event pairs, 5172 based on Foata normal form. 12/15721 useless extension candidates. Maximal degree in co-relation 58223. Up to 15209 conditions per place. [2024-06-03 19:44:18,288 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 81 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-03 19:44:18,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 817 flow [2024-06-03 19:44:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:44:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:44:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-03 19:44:18,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-03 19:44:18,290 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 454 flow. Second operand 6 states and 165 transitions. [2024-06-03 19:44:18,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 817 flow [2024-06-03 19:44:18,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 113 transitions, 773 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:18,308 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 506 flow [2024-06-03 19:44:18,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=506, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-03 19:44:18,309 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2024-06-03 19:44:18,310 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 506 flow [2024-06-03 19:44:18,310 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 19:44:18,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:18,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:18,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:44:18,310 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 19:44:18,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:18,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1037543353, now seen corresponding path program 2 times [2024-06-03 19:44:18,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:18,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482854543] [2024-06-03 19:44:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:18,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:19,147 INFO 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 19:44:19,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:19,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482854543] [2024-06-03 19:44:19,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482854543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:19,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:19,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:44:19,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965171587] [2024-06-03 19:44:19,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:19,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:44:19,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:19,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:44:19,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:44:19,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:44:19,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 506 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 19:44:19,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:19,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:44:19,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:20,929 INFO L124 PetriNetUnfolderBase]: 11276/15757 cut-off events. [2024-06-03 19:44:20,929 INFO L125 PetriNetUnfolderBase]: For 62989/62989 co-relation queries the response was YES. [2024-06-03 19:44:20,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59062 conditions, 15757 events. 11276/15757 cut-off events. For 62989/62989 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 87178 event pairs, 5421 based on Foata normal form. 6/15579 useless extension candidates. Maximal degree in co-relation 59035. Up to 15239 conditions per place. [2024-06-03 19:44:21,013 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 85 selfloop transitions, 14 changer transitions 0/106 dead transitions. [2024-06-03 19:44:21,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 770 flow [2024-06-03 19:44:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:44:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:44:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 19:44:21,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-06-03 19:44:21,015 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 506 flow. Second operand 6 states and 154 transitions. [2024-06-03 19:44:21,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 770 flow [2024-06-03 19:44:21,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 106 transitions, 727 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:21,039 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 502 flow [2024-06-03 19:44:21,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=502, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-03 19:44:21,040 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2024-06-03 19:44:21,040 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 502 flow [2024-06-03 19:44:21,040 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 19:44:21,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:21,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:21,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:44:21,041 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 19:44:21,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:21,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1378974047, now seen corresponding path program 1 times [2024-06-03 19:44:21,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:21,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411387979] [2024-06-03 19:44:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:21,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:22,401 INFO 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 19:44:22,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:22,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411387979] [2024-06-03 19:44:22,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411387979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:22,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:22,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561159082] [2024-06-03 19:44:22,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:22,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:22,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:44:22,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 502 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 19:44:22,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:22,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:44:22,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:24,635 INFO L124 PetriNetUnfolderBase]: 13685/18996 cut-off events. [2024-06-03 19:44:24,635 INFO L125 PetriNetUnfolderBase]: For 84141/84141 co-relation queries the response was YES. [2024-06-03 19:44:24,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70917 conditions, 18996 events. 13685/18996 cut-off events. For 84141/84141 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 105202 event pairs, 6615 based on Foata normal form. 6/18877 useless extension candidates. Maximal degree in co-relation 70889. Up to 18417 conditions per place. [2024-06-03 19:44:24,744 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 94 selfloop transitions, 20 changer transitions 0/120 dead transitions. [2024-06-03 19:44:24,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 120 transitions, 880 flow [2024-06-03 19:44:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 19:44:24,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-03 19:44:24,745 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 502 flow. Second operand 7 states and 172 transitions. [2024-06-03 19:44:24,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 120 transitions, 880 flow [2024-06-03 19:44:24,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 810 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:24,790 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 563 flow [2024-06-03 19:44:24,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-03 19:44:24,791 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2024-06-03 19:44:24,791 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 563 flow [2024-06-03 19:44:24,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 19:44:24,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:24,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:24,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:44:24,792 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:24,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash 485539079, now seen corresponding path program 1 times [2024-06-03 19:44:24,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211218334] [2024-06-03 19:44:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:24,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:25,524 INFO 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 19:44:25,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:25,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211218334] [2024-06-03 19:44:25,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211218334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:25,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:25,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:44:25,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621333771] [2024-06-03 19:44:25,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:25,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:44:25,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:44:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:44:25,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:44:25,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 563 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:25,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:25,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:44:25,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:27,421 INFO L124 PetriNetUnfolderBase]: 13671/19211 cut-off events. [2024-06-03 19:44:27,421 INFO L125 PetriNetUnfolderBase]: For 103968/103968 co-relation queries the response was YES. [2024-06-03 19:44:27,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75177 conditions, 19211 events. 13671/19211 cut-off events. For 103968/103968 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 108104 event pairs, 6691 based on Foata normal form. 4/19192 useless extension candidates. Maximal degree in co-relation 75148. Up to 18456 conditions per place. [2024-06-03 19:44:27,538 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 91 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2024-06-03 19:44:27,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 843 flow [2024-06-03 19:44:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:44:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:44:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-03 19:44:27,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2024-06-03 19:44:27,539 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 563 flow. Second operand 5 states and 122 transitions. [2024-06-03 19:44:27,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 843 flow [2024-06-03 19:44:27,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 107 transitions, 779 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:27,582 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 576 flow [2024-06-03 19:44:27,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=576, PETRI_PLACES=81, PETRI_TRANSITIONS=92} [2024-06-03 19:44:27,582 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2024-06-03 19:44:27,583 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 576 flow [2024-06-03 19:44:27,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:27,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:27,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:27,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:44:27,583 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 19:44:27,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:27,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1316859338, now seen corresponding path program 1 times [2024-06-03 19:44:27,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:27,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389799728] [2024-06-03 19:44:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:27,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:28,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:28,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389799728] [2024-06-03 19:44:28,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389799728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:28,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:28,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:28,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600632695] [2024-06-03 19:44:28,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:28,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:28,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:28,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:28,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:28,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:44:28,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 92 transitions, 576 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 19:44:28,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:28,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:44:28,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:30,913 INFO L124 PetriNetUnfolderBase]: 13502/19007 cut-off events. [2024-06-03 19:44:30,913 INFO L125 PetriNetUnfolderBase]: For 123819/123819 co-relation queries the response was YES. [2024-06-03 19:44:30,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78530 conditions, 19007 events. 13502/19007 cut-off events. For 123819/123819 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 109112 event pairs, 5556 based on Foata normal form. 6/18961 useless extension candidates. Maximal degree in co-relation 78500. Up to 17862 conditions per place. [2024-06-03 19:44:31,038 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 97 selfloop transitions, 38 changer transitions 0/143 dead transitions. [2024-06-03 19:44:31,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 143 transitions, 1110 flow [2024-06-03 19:44:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-03 19:44:31,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-03 19:44:31,040 INFO L175 Difference]: Start difference. First operand has 81 places, 92 transitions, 576 flow. Second operand 7 states and 193 transitions. [2024-06-03 19:44:31,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 143 transitions, 1110 flow [2024-06-03 19:44:31,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 143 transitions, 1063 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:31,105 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 716 flow [2024-06-03 19:44:31,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=716, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-03 19:44:31,105 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 28 predicate places. [2024-06-03 19:44:31,105 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 716 flow [2024-06-03 19:44:31,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 19:44:31,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:31,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:31,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:44:31,106 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 19:44:31,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1771251656, now seen corresponding path program 2 times [2024-06-03 19:44:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:31,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547306319] [2024-06-03 19:44:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:31,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:32,300 INFO 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 19:44:32,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:32,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547306319] [2024-06-03 19:44:32,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547306319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:32,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:32,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:32,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762695161] [2024-06-03 19:44:32,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:32,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:32,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:32,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:32,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:32,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:44:32,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 716 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 19:44:32,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:32,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:44:32,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:34,316 INFO L124 PetriNetUnfolderBase]: 13484/18983 cut-off events. [2024-06-03 19:44:34,316 INFO L125 PetriNetUnfolderBase]: For 148795/148795 co-relation queries the response was YES. [2024-06-03 19:44:34,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82806 conditions, 18983 events. 13484/18983 cut-off events. For 148795/148795 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 108964 event pairs, 5666 based on Foata normal form. 6/18937 useless extension candidates. Maximal degree in co-relation 82775. Up to 17959 conditions per place. [2024-06-03 19:44:34,472 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 97 selfloop transitions, 32 changer transitions 0/137 dead transitions. [2024-06-03 19:44:34,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 137 transitions, 1074 flow [2024-06-03 19:44:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-03 19:44:34,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-03 19:44:34,473 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 716 flow. Second operand 7 states and 187 transitions. [2024-06-03 19:44:34,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 137 transitions, 1074 flow [2024-06-03 19:44:34,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 137 transitions, 977 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:34,593 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 694 flow [2024-06-03 19:44:34,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-03 19:44:34,593 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-03 19:44:34,594 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 694 flow [2024-06-03 19:44:34,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 19:44:34,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:34,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:34,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:44:34,594 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 19:44:34,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:34,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1634386978, now seen corresponding path program 1 times [2024-06-03 19:44:34,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:34,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141111883] [2024-06-03 19:44:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:34,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:35,704 INFO 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 19:44:35,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:35,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141111883] [2024-06-03 19:44:35,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141111883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:35,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:35,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:35,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094126841] [2024-06-03 19:44:35,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:35,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:35,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:44:35,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 694 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 19:44:35,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:35,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:44:35,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:37,892 INFO L124 PetriNetUnfolderBase]: 13776/19305 cut-off events. [2024-06-03 19:44:37,892 INFO L125 PetriNetUnfolderBase]: For 165473/165473 co-relation queries the response was YES. [2024-06-03 19:44:37,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85716 conditions, 19305 events. 13776/19305 cut-off events. For 165473/165473 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 108106 event pairs, 6627 based on Foata normal form. 3/19260 useless extension candidates. Maximal degree in co-relation 85683. Up to 18528 conditions per place. [2024-06-03 19:44:38,054 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 109 selfloop transitions, 25 changer transitions 0/140 dead transitions. [2024-06-03 19:44:38,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 140 transitions, 1134 flow [2024-06-03 19:44:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 19:44:38,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-03 19:44:38,056 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 694 flow. Second operand 7 states and 173 transitions. [2024-06-03 19:44:38,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 140 transitions, 1134 flow [2024-06-03 19:44:38,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 140 transitions, 1050 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:38,174 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 780 flow [2024-06-03 19:44:38,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=780, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2024-06-03 19:44:38,174 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2024-06-03 19:44:38,174 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 780 flow [2024-06-03 19:44:38,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 19:44:38,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:38,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:38,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:44:38,175 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 19:44:38,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2126974386, now seen corresponding path program 1 times [2024-06-03 19:44:38,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:38,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225159584] [2024-06-03 19:44:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:38,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:39,482 INFO 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 19:44:39,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:39,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225159584] [2024-06-03 19:44:39,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225159584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:39,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:39,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:39,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636296581] [2024-06-03 19:44:39,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:39,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:39,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:39,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:39,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:39,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:44:39,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 780 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:39,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:39,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:44:39,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:42,005 INFO L124 PetriNetUnfolderBase]: 13848/19471 cut-off events. [2024-06-03 19:44:42,005 INFO L125 PetriNetUnfolderBase]: For 200129/200140 co-relation queries the response was YES. [2024-06-03 19:44:42,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91045 conditions, 19471 events. 13848/19471 cut-off events. For 200129/200140 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 112138 event pairs, 4185 based on Foata normal form. 28/19453 useless extension candidates. Maximal degree in co-relation 91011. Up to 17559 conditions per place. [2024-06-03 19:44:42,131 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 117 selfloop transitions, 61 changer transitions 0/186 dead transitions. [2024-06-03 19:44:42,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 186 transitions, 1768 flow [2024-06-03 19:44:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-03 19:44:42,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-03 19:44:42,133 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 780 flow. Second operand 8 states and 229 transitions. [2024-06-03 19:44:42,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 186 transitions, 1768 flow [2024-06-03 19:44:42,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 186 transitions, 1696 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:42,248 INFO L231 Difference]: Finished difference. Result has 96 places, 122 transitions, 1132 flow [2024-06-03 19:44:42,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1132, PETRI_PLACES=96, PETRI_TRANSITIONS=122} [2024-06-03 19:44:42,248 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2024-06-03 19:44:42,248 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 122 transitions, 1132 flow [2024-06-03 19:44:42,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:42,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:42,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:42,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:44:42,249 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 19:44:42,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:42,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2127034836, now seen corresponding path program 2 times [2024-06-03 19:44:42,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:42,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853203184] [2024-06-03 19:44:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:42,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:43,614 INFO 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 19:44:43,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:43,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853203184] [2024-06-03 19:44:43,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853203184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:43,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:43,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:43,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867113527] [2024-06-03 19:44:43,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:43,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:43,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:43,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:43,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:43,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:44:43,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 122 transitions, 1132 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:43,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:43,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:44:43,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:46,314 INFO L124 PetriNetUnfolderBase]: 14125/19852 cut-off events. [2024-06-03 19:44:46,314 INFO L125 PetriNetUnfolderBase]: For 252939/252939 co-relation queries the response was YES. [2024-06-03 19:44:46,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100349 conditions, 19852 events. 14125/19852 cut-off events. For 252939/252939 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 114413 event pairs, 5376 based on Foata normal form. 60/19800 useless extension candidates. Maximal degree in co-relation 100311. Up to 18398 conditions per place. [2024-06-03 19:44:46,474 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 131 selfloop transitions, 49 changer transitions 0/188 dead transitions. [2024-06-03 19:44:46,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 188 transitions, 1780 flow [2024-06-03 19:44:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-03 19:44:46,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041152263374485 [2024-06-03 19:44:46,476 INFO L175 Difference]: Start difference. First operand has 96 places, 122 transitions, 1132 flow. Second operand 9 states and 245 transitions. [2024-06-03 19:44:46,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 188 transitions, 1780 flow [2024-06-03 19:44:46,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 188 transitions, 1740 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-03 19:44:46,669 INFO L231 Difference]: Finished difference. Result has 103 places, 127 transitions, 1318 flow [2024-06-03 19:44:46,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1318, PETRI_PLACES=103, PETRI_TRANSITIONS=127} [2024-06-03 19:44:46,670 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-03 19:44:46,670 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 127 transitions, 1318 flow [2024-06-03 19:44:46,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:46,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:46,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:46,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:44:46,671 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 19:44:46,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1559784154, now seen corresponding path program 1 times [2024-06-03 19:44:46,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:46,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44904234] [2024-06-03 19:44:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:46,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:47,583 INFO 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 19:44:47,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:47,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44904234] [2024-06-03 19:44:47,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44904234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:47,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:47,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:44:47,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208536877] [2024-06-03 19:44:47,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:47,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:44:47,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:44:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:44:47,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:44:47,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 127 transitions, 1318 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 19:44:47,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:47,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:44:47,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:49,951 INFO L124 PetriNetUnfolderBase]: 14480/20245 cut-off events. [2024-06-03 19:44:49,952 INFO L125 PetriNetUnfolderBase]: For 278069/278069 co-relation queries the response was YES. [2024-06-03 19:44:50,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106286 conditions, 20245 events. 14480/20245 cut-off events. For 278069/278069 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 113880 event pairs, 6418 based on Foata normal form. 4/20203 useless extension candidates. Maximal degree in co-relation 106246. Up to 19593 conditions per place. [2024-06-03 19:44:50,122 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 140 selfloop transitions, 21 changer transitions 0/167 dead transitions. [2024-06-03 19:44:50,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 167 transitions, 1892 flow [2024-06-03 19:44:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:44:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:44:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 19:44:50,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-03 19:44:50,123 INFO L175 Difference]: Start difference. First operand has 103 places, 127 transitions, 1318 flow. Second operand 6 states and 153 transitions. [2024-06-03 19:44:50,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 167 transitions, 1892 flow [2024-06-03 19:44:50,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 1764 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:50,356 INFO L231 Difference]: Finished difference. Result has 103 places, 139 transitions, 1387 flow [2024-06-03 19:44:50,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1387, PETRI_PLACES=103, PETRI_TRANSITIONS=139} [2024-06-03 19:44:50,357 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-03 19:44:50,357 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 139 transitions, 1387 flow [2024-06-03 19:44:50,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 19:44:50,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:50,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:50,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:44:50,357 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 19:44:50,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:50,358 INFO L85 PathProgramCache]: Analyzing trace with hash 897907244, now seen corresponding path program 1 times [2024-06-03 19:44:50,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:50,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167515585] [2024-06-03 19:44:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:50,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:51,765 INFO 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 19:44:51,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:51,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167515585] [2024-06-03 19:44:51,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167515585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:51,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:51,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:51,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467863839] [2024-06-03 19:44:51,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:51,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:51,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:51,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:51,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:51,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:44:51,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 139 transitions, 1387 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 19:44:51,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:51,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:44:51,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:54,796 INFO L124 PetriNetUnfolderBase]: 14516/20300 cut-off events. [2024-06-03 19:44:54,796 INFO L125 PetriNetUnfolderBase]: For 307378/307378 co-relation queries the response was YES. [2024-06-03 19:44:54,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110644 conditions, 20300 events. 14516/20300 cut-off events. For 307378/307378 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 114203 event pairs, 6432 based on Foata normal form. 6/20262 useless extension candidates. Maximal degree in co-relation 110602. Up to 19627 conditions per place. [2024-06-03 19:44:54,965 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 154 selfloop transitions, 23 changer transitions 0/183 dead transitions. [2024-06-03 19:44:54,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 183 transitions, 1922 flow [2024-06-03 19:44:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 19:44:54,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279835390946502 [2024-06-03 19:44:54,977 INFO L175 Difference]: Start difference. First operand has 103 places, 139 transitions, 1387 flow. Second operand 9 states and 208 transitions. [2024-06-03 19:44:54,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 183 transitions, 1922 flow [2024-06-03 19:44:55,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 183 transitions, 1874 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-03 19:44:55,246 INFO L231 Difference]: Finished difference. Result has 112 places, 144 transitions, 1485 flow [2024-06-03 19:44:55,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1485, PETRI_PLACES=112, PETRI_TRANSITIONS=144} [2024-06-03 19:44:55,247 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 55 predicate places. [2024-06-03 19:44:55,247 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 144 transitions, 1485 flow [2024-06-03 19:44:55,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 19:44:55,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:55,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:55,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:44:55,248 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 19:44:55,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash 670006094, now seen corresponding path program 2 times [2024-06-03 19:44:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:55,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759653655] [2024-06-03 19:44:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:55,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:56,854 INFO 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 19:44:56,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:56,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759653655] [2024-06-03 19:44:56,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759653655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:56,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:56,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:56,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897032059] [2024-06-03 19:44:56,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:56,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:56,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:56,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:44:56,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 144 transitions, 1485 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 19:44:56,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:56,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:44:56,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:59,941 INFO L124 PetriNetUnfolderBase]: 14552/20352 cut-off events. [2024-06-03 19:44:59,941 INFO L125 PetriNetUnfolderBase]: For 344466/344466 co-relation queries the response was YES. [2024-06-03 19:45:00,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114378 conditions, 20352 events. 14552/20352 cut-off events. For 344466/344466 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 114511 event pairs, 6432 based on Foata normal form. 6/20314 useless extension candidates. Maximal degree in co-relation 114332. Up to 19634 conditions per place. [2024-06-03 19:45:00,118 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 156 selfloop transitions, 29 changer transitions 0/191 dead transitions. [2024-06-03 19:45:00,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 191 transitions, 2068 flow [2024-06-03 19:45:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 19:45:00,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 19:45:00,123 INFO L175 Difference]: Start difference. First operand has 112 places, 144 transitions, 1485 flow. Second operand 8 states and 198 transitions. [2024-06-03 19:45:00,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 191 transitions, 2068 flow [2024-06-03 19:45:00,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 191 transitions, 1972 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:00,382 INFO L231 Difference]: Finished difference. Result has 116 places, 151 transitions, 1582 flow [2024-06-03 19:45:00,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1582, PETRI_PLACES=116, PETRI_TRANSITIONS=151} [2024-06-03 19:45:00,383 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2024-06-03 19:45:00,383 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 151 transitions, 1582 flow [2024-06-03 19:45:00,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 19:45:00,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:00,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:00,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:45:00,383 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 19:45:00,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2114185862, now seen corresponding path program 1 times [2024-06-03 19:45:00,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:00,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039213602] [2024-06-03 19:45:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:00,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:01,696 INFO 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 19:45:01,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:01,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039213602] [2024-06-03 19:45:01,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039213602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:01,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:01,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:01,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878662774] [2024-06-03 19:45:01,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:01,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:01,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:01,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:45:01,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 151 transitions, 1582 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:01,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:01,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:45:01,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:04,550 INFO L124 PetriNetUnfolderBase]: 14543/20344 cut-off events. [2024-06-03 19:45:04,550 INFO L125 PetriNetUnfolderBase]: For 382990/383001 co-relation queries the response was YES. [2024-06-03 19:45:04,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118286 conditions, 20344 events. 14543/20344 cut-off events. For 382990/383001 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 114556 event pairs, 5898 based on Foata normal form. 7/20303 useless extension candidates. Maximal degree in co-relation 118238. Up to 19374 conditions per place. [2024-06-03 19:45:04,687 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 130 selfloop transitions, 48 changer transitions 0/184 dead transitions. [2024-06-03 19:45:04,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 184 transitions, 2038 flow [2024-06-03 19:45:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:45:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:45:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-03 19:45:04,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-03 19:45:04,689 INFO L175 Difference]: Start difference. First operand has 116 places, 151 transitions, 1582 flow. Second operand 6 states and 164 transitions. [2024-06-03 19:45:04,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 184 transitions, 2038 flow [2024-06-03 19:45:04,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 184 transitions, 1886 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:04,996 INFO L231 Difference]: Finished difference. Result has 117 places, 151 transitions, 1547 flow [2024-06-03 19:45:04,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1547, PETRI_PLACES=117, PETRI_TRANSITIONS=151} [2024-06-03 19:45:04,996 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2024-06-03 19:45:04,996 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 151 transitions, 1547 flow [2024-06-03 19:45:04,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:04,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:04,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:04,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:45:04,997 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 19:45:04,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:04,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1195999622, now seen corresponding path program 3 times [2024-06-03 19:45:04,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:04,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876243150] [2024-06-03 19:45:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:04,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:06,421 INFO 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 19:45:06,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:06,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876243150] [2024-06-03 19:45:06,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876243150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:06,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:06,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:06,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140606078] [2024-06-03 19:45:06,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:06,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:06,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:06,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:06,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:45:06,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 151 transitions, 1547 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 19:45:06,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:06,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:45:06,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:09,572 INFO L124 PetriNetUnfolderBase]: 14579/20392 cut-off events. [2024-06-03 19:45:09,572 INFO L125 PetriNetUnfolderBase]: For 409168/409168 co-relation queries the response was YES. [2024-06-03 19:45:09,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120085 conditions, 20392 events. 14579/20392 cut-off events. For 409168/409168 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 114795 event pairs, 6437 based on Foata normal form. 6/20354 useless extension candidates. Maximal degree in co-relation 120036. Up to 19659 conditions per place. [2024-06-03 19:45:09,831 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 155 selfloop transitions, 32 changer transitions 0/193 dead transitions. [2024-06-03 19:45:09,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 193 transitions, 2099 flow [2024-06-03 19:45:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 19:45:09,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2024-06-03 19:45:09,833 INFO L175 Difference]: Start difference. First operand has 117 places, 151 transitions, 1547 flow. Second operand 8 states and 196 transitions. [2024-06-03 19:45:09,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 193 transitions, 2099 flow [2024-06-03 19:45:10,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 193 transitions, 1978 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:10,134 INFO L231 Difference]: Finished difference. Result has 120 places, 154 transitions, 1586 flow [2024-06-03 19:45:10,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1586, PETRI_PLACES=120, PETRI_TRANSITIONS=154} [2024-06-03 19:45:10,134 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-03 19:45:10,134 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 154 transitions, 1586 flow [2024-06-03 19:45:10,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 19:45:10,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:10,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:10,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:45:10,135 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 19:45:10,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:10,135 INFO L85 PathProgramCache]: Analyzing trace with hash 906478124, now seen corresponding path program 4 times [2024-06-03 19:45:10,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:10,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716647448] [2024-06-03 19:45:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:10,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:11,463 INFO 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 19:45:11,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:11,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716647448] [2024-06-03 19:45:11,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716647448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:11,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:11,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:11,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828986520] [2024-06-03 19:45:11,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:11,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:11,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:11,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:11,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:11,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:45:11,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 154 transitions, 1586 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 19:45:11,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:11,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:45:11,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:14,679 INFO L124 PetriNetUnfolderBase]: 14564/20371 cut-off events. [2024-06-03 19:45:14,680 INFO L125 PetriNetUnfolderBase]: For 449987/449987 co-relation queries the response was YES. [2024-06-03 19:45:14,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122992 conditions, 20371 events. 14564/20371 cut-off events. For 449987/449987 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 114605 event pairs, 6308 based on Foata normal form. 6/20333 useless extension candidates. Maximal degree in co-relation 122942. Up to 19675 conditions per place. [2024-06-03 19:45:14,826 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 166 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2024-06-03 19:45:14,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 196 transitions, 2148 flow [2024-06-03 19:45:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 19:45:14,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2024-06-03 19:45:14,827 INFO L175 Difference]: Start difference. First operand has 120 places, 154 transitions, 1586 flow. Second operand 8 states and 195 transitions. [2024-06-03 19:45:14,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 196 transitions, 2148 flow [2024-06-03 19:45:15,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 196 transitions, 2010 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:15,172 INFO L231 Difference]: Finished difference. Result has 122 places, 157 transitions, 1594 flow [2024-06-03 19:45:15,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1594, PETRI_PLACES=122, PETRI_TRANSITIONS=157} [2024-06-03 19:45:15,173 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2024-06-03 19:45:15,173 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 157 transitions, 1594 flow [2024-06-03 19:45:15,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 19:45:15,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:15,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:15,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:45:15,173 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:45:15,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1548356314, now seen corresponding path program 2 times [2024-06-03 19:45:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:15,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942894429] [2024-06-03 19:45:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:15,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:16,065 INFO 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 19:45:16,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:16,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942894429] [2024-06-03 19:45:16,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942894429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:16,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:16,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:45:16,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933763425] [2024-06-03 19:45:16,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:16,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:45:16,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:45:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:45:16,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:45:16,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 157 transitions, 1594 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 19:45:16,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:16,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:45:16,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:18,836 INFO L124 PetriNetUnfolderBase]: 14550/20353 cut-off events. [2024-06-03 19:45:18,837 INFO L125 PetriNetUnfolderBase]: For 446466/446466 co-relation queries the response was YES. [2024-06-03 19:45:18,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122480 conditions, 20353 events. 14550/20353 cut-off events. For 446466/446466 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 114471 event pairs, 6432 based on Foata normal form. 4/20313 useless extension candidates. Maximal degree in co-relation 122429. Up to 19743 conditions per place. [2024-06-03 19:45:19,023 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 154 selfloop transitions, 15 changer transitions 0/175 dead transitions. [2024-06-03 19:45:19,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 175 transitions, 1980 flow [2024-06-03 19:45:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:45:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:45:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 19:45:19,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382716049382716 [2024-06-03 19:45:19,024 INFO L175 Difference]: Start difference. First operand has 122 places, 157 transitions, 1594 flow. Second operand 6 states and 142 transitions. [2024-06-03 19:45:19,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 175 transitions, 1980 flow [2024-06-03 19:45:19,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1834 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:19,472 INFO L231 Difference]: Finished difference. Result has 122 places, 157 transitions, 1487 flow [2024-06-03 19:45:19,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1487, PETRI_PLACES=122, PETRI_TRANSITIONS=157} [2024-06-03 19:45:19,472 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2024-06-03 19:45:19,472 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 157 transitions, 1487 flow [2024-06-03 19:45:19,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 19:45:19,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:19,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:19,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:45:19,473 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:45:19,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1554064282, now seen corresponding path program 1 times [2024-06-03 19:45:19,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:19,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405647125] [2024-06-03 19:45:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:20,242 INFO 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 19:45:20,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:20,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405647125] [2024-06-03 19:45:20,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405647125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:20,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:20,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:45:20,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547415981] [2024-06-03 19:45:20,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:20,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:45:20,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:45:20,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:45:20,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-03 19:45:20,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 157 transitions, 1487 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 19:45:20,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:20,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-03 19:45:20,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand