./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix004.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix004.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix004.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix004.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-7724a2d-m [2024-06-27 19:46:41,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:46:41,191 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:46:41,195 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:46:41,195 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:46:41,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:46:41,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:46:41,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:46:41,220 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:46:41,223 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:46:41,223 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:46:41,224 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:46:41,224 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:46:41,225 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:46:41,225 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:46:41,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:46:41,226 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:46:41,226 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:46:41,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:46:41,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:46:41,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:46:41,228 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:46:41,228 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:46:41,228 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:46:41,229 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:46:41,229 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:46:41,229 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:46:41,229 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:46:41,230 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:46:41,230 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:46:41,231 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:46:41,231 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:46:41,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:46:41,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:46:41,232 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:46:41,232 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:46:41,232 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:46:41,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:46:41,232 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:46:41,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:46:41,233 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:46:41,233 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:46:41,233 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:46:41,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:46:41,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:46:41,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:46:41,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:46:41,462 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:46:41,463 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:46:41,463 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix004.oepc.yml/witness.yml [2024-06-27 19:46:41,690 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:46:41,691 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:46:41,692 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix004.oepc.i [2024-06-27 19:46:42,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:46:42,866 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:46:42,867 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix004.oepc.i [2024-06-27 19:46:42,879 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81b7fc8fe/78addbbc59bb467e9b7e2e0c95c7adec/FLAG30f49b3f2 [2024-06-27 19:46:42,893 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81b7fc8fe/78addbbc59bb467e9b7e2e0c95c7adec [2024-06-27 19:46:42,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:46:42,895 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:46:42,897 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:46:42,897 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:46:42,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:46:42,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:46:41" (1/2) ... [2024-06-27 19:46:42,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4248302a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:42, skipping insertion in model container [2024-06-27 19:46:42,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:46:41" (1/2) ... [2024-06-27 19:46:42,903 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c51318 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:42, skipping insertion in model container [2024-06-27 19:46:42,903 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:46:42" (2/2) ... [2024-06-27 19:46:42,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4248302a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:42, skipping insertion in model container [2024-06-27 19:46:42,904 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:46:42" (2/2) ... [2024-06-27 19:46:42,904 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:46:43,013 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:46:43,014 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 19:46:43,015 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 19:46:43,015 INFO L97 edCorrectnessWitness]: Location invariant before [L881-L881] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 19:46:43,015 INFO L97 edCorrectnessWitness]: Location invariant before [L880-L880] ((((((((((((((((((((((((! multithreaded || a$read_delayed == (_Bool)0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-27 19:46:43,015 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:46:43,015 INFO L106 edCorrectnessWitness]: ghost_update [L874-L874] multithreaded = 1; [2024-06-27 19:46:43,050 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:46:43,333 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:46:43,345 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:46:43,467 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:46:43,491 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:46:43,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43 WrapperNode [2024-06-27 19:46:43,491 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:46:43,492 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:46:43,492 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:46:43,492 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:46:43,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,513 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,547 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 141 [2024-06-27 19:46:43,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:46:43,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:46:43,548 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:46:43,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:46:43,557 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,560 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,573 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]. [2024-06-27 19:46:43,573 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,574 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,582 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,583 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,585 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,586 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,589 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:46:43,600 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:46:43,601 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:46:43,601 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:46:43,601 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (1/1) ... [2024-06-27 19:46:43,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:46:43,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:46:43,633 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) [2024-06-27 19:46:43,636 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 [2024-06-27 19:46:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:46:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:46:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:46:43,663 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:46:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:46:43,663 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:46:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:46:43,664 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:46:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 19:46:43,665 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 19:46:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:46:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:46:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:46:43,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:46:43,667 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:46:43,809 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:46:43,811 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:46:44,164 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:46:44,164 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:46:44,305 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:46:44,306 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:46:44,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:46:44 BoogieIcfgContainer [2024-06-27 19:46:44,307 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:46:44,309 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:46:44,309 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:46:44,311 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:46:44,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:46:41" (1/4) ... [2024-06-27 19:46:44,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2e6d14 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:46:44, skipping insertion in model container [2024-06-27 19:46:44,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:46:42" (2/4) ... [2024-06-27 19:46:44,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2e6d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:46:44, skipping insertion in model container [2024-06-27 19:46:44,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:43" (3/4) ... [2024-06-27 19:46:44,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2e6d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:46:44, skipping insertion in model container [2024-06-27 19:46:44,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:46:44" (4/4) ... [2024-06-27 19:46:44,313 INFO L112 eAbstractionObserver]: Analyzing ICFG mix004.oepc.i [2024-06-27 19:46:44,326 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:46:44,327 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 19:46:44,327 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:46:44,373 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:46:44,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 19:46:44,431 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-27 19:46:44,432 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:46:44,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:46:44,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 19:46:44,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-27 19:46:44,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:46:44,477 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;@3b6b254c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:46:44,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 19:46:44,480 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:46:44,480 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:46:44,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:46:44,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:44,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:46:44,481 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)] === [2024-06-27 19:46:44,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:44,513 INFO L85 PathProgramCache]: Analyzing trace with hash 406078723, now seen corresponding path program 1 times [2024-06-27 19:46:44,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:44,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218900708] [2024-06-27 19:46:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:44,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:45,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:45,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218900708] [2024-06-27 19:46:45,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218900708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:45,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:45,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:46:45,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680297249] [2024-06-27 19:46:45,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:45,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:46:45,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:45,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:46:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:46:45,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-27 19:46:45,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:45,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:45,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-27 19:46:45,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:46,784 INFO L124 PetriNetUnfolderBase]: 7892/11157 cut-off events. [2024-06-27 19:46:46,784 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-27 19:46:46,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22234 conditions, 11157 events. 7892/11157 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 62667 event pairs, 6010 based on Foata normal form. 1/10882 useless extension candidates. Maximal degree in co-relation 22221. Up to 10748 conditions per place. [2024-06-27 19:46:46,854 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 19:46:46,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 229 flow [2024-06-27 19:46:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:46:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:46:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-27 19:46:46,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-27 19:46:46,866 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 102 transitions. [2024-06-27 19:46:46,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 229 flow [2024-06-27 19:46:46,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:46,874 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-27 19:46:46,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-27 19:46:46,878 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-27 19:46:46,879 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-27 19:46:46,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:46,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:46,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:46,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:46:46,880 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)] === [2024-06-27 19:46:46,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash -599867518, now seen corresponding path program 1 times [2024-06-27 19:46:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:46,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602136807] [2024-06-27 19:46:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:46,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:47,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:47,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602136807] [2024-06-27 19:46:47,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602136807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:47,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:47,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:46:47,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617175324] [2024-06-27 19:46:47,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:47,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:46:47,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:47,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:46:47,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:46:47,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-27 19:46:47,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:47,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:47,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-27 19:46:47,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:48,764 INFO L124 PetriNetUnfolderBase]: 7882/11154 cut-off events. [2024-06-27 19:46:48,764 INFO L125 PetriNetUnfolderBase]: For 2224/2224 co-relation queries the response was YES. [2024-06-27 19:46:48,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25192 conditions, 11154 events. 7882/11154 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 62490 event pairs, 5323 based on Foata normal form. 4/11042 useless extension candidates. Maximal degree in co-relation 25180. Up to 10713 conditions per place. [2024-06-27 19:46:48,837 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 19:46:48,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-27 19:46:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:46:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:46:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-27 19:46:48,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-27 19:46:48,842 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-27 19:46:48,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-27 19:46:48,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:46:48,849 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-27 19:46:48,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-27 19:46:48,850 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-27 19:46:48,851 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-27 19:46:48,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:48,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:48,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:48,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:46:48,854 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)] === [2024-06-27 19:46:48,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:48,863 INFO L85 PathProgramCache]: Analyzing trace with hash -947022815, now seen corresponding path program 1 times [2024-06-27 19:46:48,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:48,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404765137] [2024-06-27 19:46:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:48,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:49,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404765137] [2024-06-27 19:46:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404765137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:49,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:49,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:46:49,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137690407] [2024-06-27 19:46:49,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:49,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:46:49,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:49,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:46:49,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:46:50,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-27 19:46:50,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:50,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:50,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-27 19:46:50,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:51,376 INFO L124 PetriNetUnfolderBase]: 9557/13469 cut-off events. [2024-06-27 19:46:51,376 INFO L125 PetriNetUnfolderBase]: For 7339/7339 co-relation queries the response was YES. [2024-06-27 19:46:51,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33708 conditions, 13469 events. 9557/13469 cut-off events. For 7339/7339 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 76055 event pairs, 5407 based on Foata normal form. 4/13330 useless extension candidates. Maximal degree in co-relation 33694. Up to 12912 conditions per place. [2024-06-27 19:46:51,442 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-27 19:46:51,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 508 flow [2024-06-27 19:46:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-27 19:46:51,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-06-27 19:46:51,447 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 190 transitions. [2024-06-27 19:46:51,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 508 flow [2024-06-27 19:46:51,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 480 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 19:46:51,451 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 258 flow [2024-06-27 19:46:51,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-27 19:46:51,452 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-27 19:46:51,453 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 258 flow [2024-06-27 19:46:51,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:51,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:51,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:51,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:46:51,453 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)] === [2024-06-27 19:46:51,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash -150025339, now seen corresponding path program 1 times [2024-06-27 19:46:51,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:51,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708179459] [2024-06-27 19:46:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:51,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:52,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:52,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708179459] [2024-06-27 19:46:52,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708179459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:52,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:52,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:52,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248411811] [2024-06-27 19:46:52,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:52,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:52,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:52,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:52,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:52,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-27 19:46:52,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:52,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:52,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-27 19:46:52,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:54,212 INFO L124 PetriNetUnfolderBase]: 9541/13451 cut-off events. [2024-06-27 19:46:54,213 INFO L125 PetriNetUnfolderBase]: For 14753/14753 co-relation queries the response was YES. [2024-06-27 19:46:54,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37576 conditions, 13451 events. 9541/13451 cut-off events. For 14753/14753 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 76128 event pairs, 4602 based on Foata normal form. 8/13312 useless extension candidates. Maximal degree in co-relation 37560. Up to 12846 conditions per place. [2024-06-27 19:46:54,274 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-27 19:46:54,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 598 flow [2024-06-27 19:46:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 19:46:54,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822102425876011 [2024-06-27 19:46:54,276 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 258 flow. Second operand 7 states and 216 transitions. [2024-06-27 19:46:54,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 598 flow [2024-06-27 19:46:54,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 559 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:46:54,281 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 291 flow [2024-06-27 19:46:54,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-27 19:46:54,281 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-27 19:46:54,282 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 291 flow [2024-06-27 19:46:54,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:54,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:54,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:54,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:46:54,282 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:46:54,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:54,283 INFO L85 PathProgramCache]: Analyzing trace with hash -953008957, now seen corresponding path program 1 times [2024-06-27 19:46:54,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:54,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541931991] [2024-06-27 19:46:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:54,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:54,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:54,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541931991] [2024-06-27 19:46:54,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541931991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:54,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:54,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:46:54,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431850381] [2024-06-27 19:46:54,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:54,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:46:54,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:46:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:46:54,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:46:54,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 291 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) [2024-06-27 19:46:54,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:54,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:46:54,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:56,338 INFO L124 PetriNetUnfolderBase]: 9523/13523 cut-off events. [2024-06-27 19:46:56,338 INFO L125 PetriNetUnfolderBase]: For 23082/23082 co-relation queries the response was YES. [2024-06-27 19:46:56,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40354 conditions, 13523 events. 9523/13523 cut-off events. For 23082/23082 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 77246 event pairs, 4907 based on Foata normal form. 6/13426 useless extension candidates. Maximal degree in co-relation 40336. Up to 12897 conditions per place. [2024-06-27 19:46:56,402 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 65 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-27 19:46:56,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 513 flow [2024-06-27 19:46:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:46:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:46:56,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 19:46:56,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-27 19:46:56,403 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 291 flow. Second operand 5 states and 133 transitions. [2024-06-27 19:46:56,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 513 flow [2024-06-27 19:46:56,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 459 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:56,409 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 302 flow [2024-06-27 19:46:56,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-27 19:46:56,410 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-27 19:46:56,411 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 302 flow [2024-06-27 19:46:56,411 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) [2024-06-27 19:46:56,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:56,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:56,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:46:56,412 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)] === [2024-06-27 19:46:56,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash 844996688, now seen corresponding path program 1 times [2024-06-27 19:46:56,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:56,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381195498] [2024-06-27 19:46:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:56,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:57,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:57,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381195498] [2024-06-27 19:46:57,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381195498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:57,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:57,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:57,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986982793] [2024-06-27 19:46:57,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:57,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:57,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:57,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:57,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:57,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:46:57,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 302 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) [2024-06-27 19:46:57,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:57,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:46:57,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:58,576 INFO L124 PetriNetUnfolderBase]: 9598/13608 cut-off events. [2024-06-27 19:46:58,576 INFO L125 PetriNetUnfolderBase]: For 32694/32694 co-relation queries the response was YES. [2024-06-27 19:46:58,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43921 conditions, 13608 events. 9598/13608 cut-off events. For 32694/32694 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 77595 event pairs, 4663 based on Foata normal form. 6/13512 useless extension candidates. Maximal degree in co-relation 43901. Up to 12924 conditions per place. [2024-06-27 19:46:58,651 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 21 changer transitions 0/109 dead transitions. [2024-06-27 19:46:58,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 109 transitions, 713 flow [2024-06-27 19:46:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-27 19:46:58,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-27 19:46:58,653 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 302 flow. Second operand 6 states and 167 transitions. [2024-06-27 19:46:58,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 109 transitions, 713 flow [2024-06-27 19:46:58,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 659 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:46:58,659 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 424 flow [2024-06-27 19:46:58,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=424, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-06-27 19:46:58,660 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-06-27 19:46:58,660 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 424 flow [2024-06-27 19:46:58,660 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) [2024-06-27 19:46:58,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:58,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:58,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:46:58,661 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)] === [2024-06-27 19:46:58,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash -469268924, now seen corresponding path program 2 times [2024-06-27 19:46:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:58,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866256073] [2024-06-27 19:46:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:58,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:59,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:59,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866256073] [2024-06-27 19:46:59,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866256073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:59,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:59,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:59,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653953700] [2024-06-27 19:46:59,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:59,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:59,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:59,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:59,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:59,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:46:59,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 424 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) [2024-06-27 19:46:59,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:59,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:46:59,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:00,866 INFO L124 PetriNetUnfolderBase]: 9580/13589 cut-off events. [2024-06-27 19:47:00,867 INFO L125 PetriNetUnfolderBase]: For 45281/45281 co-relation queries the response was YES. [2024-06-27 19:47:00,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47892 conditions, 13589 events. 9580/13589 cut-off events. For 45281/45281 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 77449 event pairs, 4756 based on Foata normal form. 6/13494 useless extension candidates. Maximal degree in co-relation 47870. Up to 12960 conditions per place. [2024-06-27 19:47:00,953 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-27 19:47:00,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 678 flow [2024-06-27 19:47:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:47:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:47:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 19:47:00,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-27 19:47:00,955 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 424 flow. Second operand 6 states and 158 transitions. [2024-06-27 19:47:00,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 678 flow [2024-06-27 19:47:00,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 632 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 19:47:00,979 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 417 flow [2024-06-27 19:47:00,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=417, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-27 19:47:00,980 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-27 19:47:00,980 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 417 flow [2024-06-27 19:47:00,981 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) [2024-06-27 19:47:00,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:00,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:00,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:47:00,981 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)] === [2024-06-27 19:47:00,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1532544948, now seen corresponding path program 1 times [2024-06-27 19:47:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:00,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925140213] [2024-06-27 19:47:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:00,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:01,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:01,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925140213] [2024-06-27 19:47:01,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925140213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:01,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:01,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45857277] [2024-06-27 19:47:01,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:01,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:01,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:01,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:02,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:47:02,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 417 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:02,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:02,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:47:02,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:03,686 INFO L124 PetriNetUnfolderBase]: 9624/13605 cut-off events. [2024-06-27 19:47:03,687 INFO L125 PetriNetUnfolderBase]: For 51592/51592 co-relation queries the response was YES. [2024-06-27 19:47:03,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48575 conditions, 13605 events. 9624/13605 cut-off events. For 51592/51592 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 77257 event pairs, 4668 based on Foata normal form. 6/13507 useless extension candidates. Maximal degree in co-relation 48550. Up to 12993 conditions per place. [2024-06-27 19:47:03,753 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 93 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-06-27 19:47:03,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 777 flow [2024-06-27 19:47:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:47:03,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-27 19:47:03,755 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 417 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:47:03,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 777 flow [2024-06-27 19:47:03,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 730 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:03,774 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 463 flow [2024-06-27 19:47:03,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=463, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-27 19:47:03,777 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-27 19:47:03,777 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 463 flow [2024-06-27 19:47:03,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:03,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:03,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:03,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:47:03,778 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)] === [2024-06-27 19:47:03,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash 425094336, now seen corresponding path program 2 times [2024-06-27 19:47:03,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:03,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244952928] [2024-06-27 19:47:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:03,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:04,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:04,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244952928] [2024-06-27 19:47:04,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244952928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:04,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:04,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:04,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109987110] [2024-06-27 19:47:04,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:04,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:04,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:04,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:04,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:47:04,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 463 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:04,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:04,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:47:04,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:06,260 INFO L124 PetriNetUnfolderBase]: 9699/13714 cut-off events. [2024-06-27 19:47:06,261 INFO L125 PetriNetUnfolderBase]: For 66539/66539 co-relation queries the response was YES. [2024-06-27 19:47:06,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52421 conditions, 13714 events. 9699/13714 cut-off events. For 66539/66539 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 77718 event pairs, 4479 based on Foata normal form. 6/13611 useless extension candidates. Maximal degree in co-relation 52397. Up to 12935 conditions per place. [2024-06-27 19:47:06,357 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 86 selfloop transitions, 35 changer transitions 0/129 dead transitions. [2024-06-27 19:47:06,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 951 flow [2024-06-27 19:47:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 19:47:06,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256064690026954 [2024-06-27 19:47:06,359 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 463 flow. Second operand 7 states and 195 transitions. [2024-06-27 19:47:06,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 951 flow [2024-06-27 19:47:06,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 129 transitions, 890 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:06,385 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 583 flow [2024-06-27 19:47:06,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=583, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2024-06-27 19:47:06,386 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-27 19:47:06,387 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 583 flow [2024-06-27 19:47:06,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:06,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:06,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:06,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:47:06,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:47:06,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1650815482, now seen corresponding path program 3 times [2024-06-27 19:47:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:06,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154933205] [2024-06-27 19:47:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:06,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:07,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:07,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154933205] [2024-06-27 19:47:07,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154933205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:07,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:07,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:07,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275765139] [2024-06-27 19:47:07,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:07,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:07,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:07,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:07,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:07,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:47:07,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 583 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:07,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:07,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:47:07,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:09,219 INFO L124 PetriNetUnfolderBase]: 9681/13695 cut-off events. [2024-06-27 19:47:09,219 INFO L125 PetriNetUnfolderBase]: For 84599/84599 co-relation queries the response was YES. [2024-06-27 19:47:09,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55616 conditions, 13695 events. 9681/13695 cut-off events. For 84599/84599 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 77815 event pairs, 4675 based on Foata normal form. 6/13593 useless extension candidates. Maximal degree in co-relation 55591. Up to 13060 conditions per place. [2024-06-27 19:47:09,295 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 96 selfloop transitions, 18 changer transitions 0/122 dead transitions. [2024-06-27 19:47:09,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 122 transitions, 899 flow [2024-06-27 19:47:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:47:09,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-27 19:47:09,296 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 583 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:47:09,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 122 transitions, 899 flow [2024-06-27 19:47:09,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 815 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 19:47:09,336 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 546 flow [2024-06-27 19:47:09,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=546, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2024-06-27 19:47:09,337 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-27 19:47:09,337 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 546 flow [2024-06-27 19:47:09,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:09,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:09,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:09,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:47:09,338 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)] === [2024-06-27 19:47:09,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:09,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1355047194, now seen corresponding path program 1 times [2024-06-27 19:47:09,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:09,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799305959] [2024-06-27 19:47:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:09,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:10,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:10,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799305959] [2024-06-27 19:47:10,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799305959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:10,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:10,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:47:10,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421887946] [2024-06-27 19:47:10,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:10,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:47:10,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:47:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:47:10,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:47:10,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 546 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:10,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:10,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:47:10,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:12,785 INFO L124 PetriNetUnfolderBase]: 11757/16582 cut-off events. [2024-06-27 19:47:12,785 INFO L125 PetriNetUnfolderBase]: For 110164/110164 co-relation queries the response was YES. [2024-06-27 19:47:12,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66816 conditions, 16582 events. 11757/16582 cut-off events. For 110164/110164 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 94524 event pairs, 5699 based on Foata normal form. 6/16423 useless extension candidates. Maximal degree in co-relation 66789. Up to 15837 conditions per place. [2024-06-27 19:47:12,871 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 101 selfloop transitions, 20 changer transitions 0/128 dead transitions. [2024-06-27 19:47:12,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 945 flow [2024-06-27 19:47:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:47:12,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-27 19:47:12,873 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 546 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:47:12,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 945 flow [2024-06-27 19:47:12,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 879 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:12,918 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 618 flow [2024-06-27 19:47:12,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2024-06-27 19:47:12,919 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2024-06-27 19:47:12,919 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 618 flow [2024-06-27 19:47:12,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:12,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:12,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:12,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:47:12,919 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:47:12,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1764938598, now seen corresponding path program 1 times [2024-06-27 19:47:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539242102] [2024-06-27 19:47:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:13,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:13,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539242102] [2024-06-27 19:47:13,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539242102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:13,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:13,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:47:13,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768041968] [2024-06-27 19:47:13,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:13,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:47:13,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:13,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:47:13,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:47:13,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:47:13,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:13,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:13,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:47:13,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:15,623 INFO L124 PetriNetUnfolderBase]: 13420/18899 cut-off events. [2024-06-27 19:47:15,624 INFO L125 PetriNetUnfolderBase]: For 148158/148167 co-relation queries the response was YES. [2024-06-27 19:47:15,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80360 conditions, 18899 events. 13420/18899 cut-off events. For 148158/148167 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 107739 event pairs, 7113 based on Foata normal form. 11/18886 useless extension candidates. Maximal degree in co-relation 80331. Up to 18186 conditions per place. [2024-06-27 19:47:15,735 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 94 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2024-06-27 19:47:15,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 114 transitions, 902 flow [2024-06-27 19:47:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:47:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:47:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 19:47:15,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2024-06-27 19:47:15,736 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 618 flow. Second operand 5 states and 124 transitions. [2024-06-27 19:47:15,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 114 transitions, 902 flow [2024-06-27 19:47:15,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 114 transitions, 832 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:47:15,798 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 625 flow [2024-06-27 19:47:15,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=625, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-27 19:47:15,798 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-27 19:47:15,798 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 625 flow [2024-06-27 19:47:15,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:15,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:15,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:47:15,799 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)] === [2024-06-27 19:47:15,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash 289214063, now seen corresponding path program 1 times [2024-06-27 19:47:15,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:15,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015841711] [2024-06-27 19:47:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:15,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:16,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:16,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015841711] [2024-06-27 19:47:16,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015841711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:16,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:16,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:47:16,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878558742] [2024-06-27 19:47:16,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:16,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:47:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:16,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:47:16,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:47:17,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:47:17,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 625 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:17,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:17,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:47:17,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:19,474 INFO L124 PetriNetUnfolderBase]: 13250/18689 cut-off events. [2024-06-27 19:47:19,474 INFO L125 PetriNetUnfolderBase]: For 176294/176302 co-relation queries the response was YES. [2024-06-27 19:47:19,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84244 conditions, 18689 events. 13250/18689 cut-off events. For 176294/176302 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 108880 event pairs, 6010 based on Foata normal form. 6/18587 useless extension candidates. Maximal degree in co-relation 84214. Up to 17596 conditions per place. [2024-06-27 19:47:19,607 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 128 selfloop transitions, 30 changer transitions 0/168 dead transitions. [2024-06-27 19:47:19,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 168 transitions, 1281 flow [2024-06-27 19:47:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-27 19:47:19,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519916142557652 [2024-06-27 19:47:19,609 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 625 flow. Second operand 9 states and 248 transitions. [2024-06-27 19:47:19,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 168 transitions, 1281 flow [2024-06-27 19:47:19,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 168 transitions, 1234 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 19:47:19,679 INFO L231 Difference]: Finished difference. Result has 91 places, 108 transitions, 769 flow [2024-06-27 19:47:19,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=769, PETRI_PLACES=91, PETRI_TRANSITIONS=108} [2024-06-27 19:47:19,679 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-27 19:47:19,679 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 108 transitions, 769 flow [2024-06-27 19:47:19,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:19,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:19,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:19,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:47:19,680 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)] === [2024-06-27 19:47:19,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash 736130637, now seen corresponding path program 2 times [2024-06-27 19:47:19,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:19,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604547186] [2024-06-27 19:47:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:19,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:20,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:20,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604547186] [2024-06-27 19:47:20,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604547186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:20,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:20,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:47:20,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115743306] [2024-06-27 19:47:20,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:20,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:47:20,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:20,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:47:20,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:47:21,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:47:21,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 108 transitions, 769 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:21,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:21,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:47:21,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:23,395 INFO L124 PetriNetUnfolderBase]: 13236/18679 cut-off events. [2024-06-27 19:47:23,395 INFO L125 PetriNetUnfolderBase]: For 207817/207857 co-relation queries the response was YES. [2024-06-27 19:47:23,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88563 conditions, 18679 events. 13236/18679 cut-off events. For 207817/207857 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 109051 event pairs, 6019 based on Foata normal form. 6/18574 useless extension candidates. Maximal degree in co-relation 88532. Up to 17636 conditions per place. [2024-06-27 19:47:23,536 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 122 selfloop transitions, 22 changer transitions 0/154 dead transitions. [2024-06-27 19:47:23,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 154 transitions, 1179 flow [2024-06-27 19:47:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:47:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:47:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 19:47:23,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-27 19:47:23,538 INFO L175 Difference]: Start difference. First operand has 91 places, 108 transitions, 769 flow. Second operand 8 states and 215 transitions. [2024-06-27 19:47:23,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 154 transitions, 1179 flow [2024-06-27 19:47:23,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1067 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:23,652 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 712 flow [2024-06-27 19:47:23,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=712, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-27 19:47:23,653 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-27 19:47:23,653 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 712 flow [2024-06-27 19:47:23,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:23,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:23,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:23,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:47:23,653 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)] === [2024-06-27 19:47:23,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:23,653 INFO L85 PathProgramCache]: Analyzing trace with hash -260533247, now seen corresponding path program 3 times [2024-06-27 19:47:23,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:23,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665788763] [2024-06-27 19:47:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:23,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:24,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:24,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665788763] [2024-06-27 19:47:24,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665788763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:24,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:24,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:47:24,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867056807] [2024-06-27 19:47:24,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:24,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:47:24,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:24,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:47:24,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:47:24,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:47:24,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 712 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:24,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:24,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:47:24,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:27,054 INFO L124 PetriNetUnfolderBase]: 13263/18790 cut-off events. [2024-06-27 19:47:27,054 INFO L125 PetriNetUnfolderBase]: For 225455/225471 co-relation queries the response was YES. [2024-06-27 19:47:27,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90145 conditions, 18790 events. 13263/18790 cut-off events. For 225455/225471 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 110153 event pairs, 5627 based on Foata normal form. 10/18757 useless extension candidates. Maximal degree in co-relation 90112. Up to 17448 conditions per place. [2024-06-27 19:47:27,192 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 106 selfloop transitions, 49 changer transitions 0/165 dead transitions. [2024-06-27 19:47:27,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 165 transitions, 1366 flow [2024-06-27 19:47:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:47:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:47:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-27 19:47:27,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-27 19:47:27,194 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 712 flow. Second operand 8 states and 222 transitions. [2024-06-27 19:47:27,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 165 transitions, 1366 flow [2024-06-27 19:47:27,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 165 transitions, 1311 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:47:27,291 INFO L231 Difference]: Finished difference. Result has 96 places, 116 transitions, 928 flow [2024-06-27 19:47:27,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=928, PETRI_PLACES=96, PETRI_TRANSITIONS=116} [2024-06-27 19:47:27,291 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-27 19:47:27,291 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 116 transitions, 928 flow [2024-06-27 19:47:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:27,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:27,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:27,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:47:27,292 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:47:27,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:27,292 INFO L85 PathProgramCache]: Analyzing trace with hash 149391151, now seen corresponding path program 1 times [2024-06-27 19:47:27,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:27,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684180124] [2024-06-27 19:47:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:27,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:28,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:28,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684180124] [2024-06-27 19:47:28,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684180124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:28,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:28,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:47:28,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515571716] [2024-06-27 19:47:28,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:28,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:47:28,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:28,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:47:28,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:47:28,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:47:28,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 116 transitions, 928 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:28,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:28,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:47:28,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:30,792 INFO L124 PetriNetUnfolderBase]: 13608/19198 cut-off events. [2024-06-27 19:47:30,792 INFO L125 PetriNetUnfolderBase]: For 265766/265766 co-relation queries the response was YES. [2024-06-27 19:47:30,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97246 conditions, 19198 events. 13608/19198 cut-off events. For 265766/265766 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 109753 event pairs, 6372 based on Foata normal form. 3/19185 useless extension candidates. Maximal degree in co-relation 97211. Up to 18148 conditions per place. [2024-06-27 19:47:30,923 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 123 selfloop transitions, 25 changer transitions 0/156 dead transitions. [2024-06-27 19:47:30,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 156 transitions, 1413 flow [2024-06-27 19:47:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:47:30,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-27 19:47:30,925 INFO L175 Difference]: Start difference. First operand has 96 places, 116 transitions, 928 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:47:30,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 156 transitions, 1413 flow [2024-06-27 19:47:31,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1326 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:47:31,080 INFO L231 Difference]: Finished difference. Result has 99 places, 124 transitions, 1028 flow [2024-06-27 19:47:31,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1028, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2024-06-27 19:47:31,080 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-27 19:47:31,081 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 1028 flow [2024-06-27 19:47:31,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:31,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:31,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:31,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:47:31,081 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)] === [2024-06-27 19:47:31,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:31,081 INFO L85 PathProgramCache]: Analyzing trace with hash 935576577, now seen corresponding path program 4 times [2024-06-27 19:47:31,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:31,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290308501] [2024-06-27 19:47:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:31,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:32,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:32,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290308501] [2024-06-27 19:47:32,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290308501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:32,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:32,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:47:32,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633828486] [2024-06-27 19:47:32,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:32,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:47:32,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:47:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:47:32,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:47:32,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 1028 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:32,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:32,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:47:32,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:34,714 INFO L124 PetriNetUnfolderBase]: 13285/18749 cut-off events. [2024-06-27 19:47:34,714 INFO L125 PetriNetUnfolderBase]: For 284592/284592 co-relation queries the response was YES. [2024-06-27 19:47:34,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97614 conditions, 18749 events. 13285/18749 cut-off events. For 284592/284592 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 109112 event pairs, 5801 based on Foata normal form. 9/18658 useless extension candidates. Maximal degree in co-relation 97577. Up to 17560 conditions per place. [2024-06-27 19:47:34,865 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 122 selfloop transitions, 40 changer transitions 0/172 dead transitions. [2024-06-27 19:47:34,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 172 transitions, 1634 flow [2024-06-27 19:47:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:47:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:47:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 19:47:34,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-27 19:47:34,866 INFO L175 Difference]: Start difference. First operand has 99 places, 124 transitions, 1028 flow. Second operand 8 states and 214 transitions. [2024-06-27 19:47:34,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 172 transitions, 1634 flow [2024-06-27 19:47:35,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 172 transitions, 1554 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:35,046 INFO L231 Difference]: Finished difference. Result has 102 places, 128 transitions, 1120 flow [2024-06-27 19:47:35,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1120, PETRI_PLACES=102, PETRI_TRANSITIONS=128} [2024-06-27 19:47:35,046 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-27 19:47:35,046 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 128 transitions, 1120 flow [2024-06-27 19:47:35,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:35,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:35,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:35,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:47:35,047 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:47:35,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1148291696, now seen corresponding path program 1 times [2024-06-27 19:47:35,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:35,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114475895] [2024-06-27 19:47:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:35,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:35,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:35,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114475895] [2024-06-27 19:47:35,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114475895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:35,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:35,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:47:35,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877618844] [2024-06-27 19:47:35,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:35,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:47:35,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:35,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:47:35,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:47:35,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:47:35,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 128 transitions, 1120 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:35,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:35,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:47:35,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:38,291 INFO L124 PetriNetUnfolderBase]: 13695/19279 cut-off events. [2024-06-27 19:47:38,291 INFO L125 PetriNetUnfolderBase]: For 338574/338609 co-relation queries the response was YES. [2024-06-27 19:47:38,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103515 conditions, 19279 events. 13695/19279 cut-off events. For 338574/338609 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 110191 event pairs, 6862 based on Foata normal form. 13/19261 useless extension candidates. Maximal degree in co-relation 103477. Up to 18469 conditions per place. [2024-06-27 19:47:38,445 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 125 selfloop transitions, 14 changer transitions 0/151 dead transitions. [2024-06-27 19:47:38,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 1498 flow [2024-06-27 19:47:38,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:47:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:47:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:47:38,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2024-06-27 19:47:38,446 INFO L175 Difference]: Start difference. First operand has 102 places, 128 transitions, 1120 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:47:38,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 1498 flow [2024-06-27 19:47:38,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 1331 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:38,588 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1050 flow [2024-06-27 19:47:38,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1050, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-27 19:47:38,588 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-27 19:47:38,588 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1050 flow [2024-06-27 19:47:38,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:38,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:38,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:38,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:47:38,589 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)] === [2024-06-27 19:47:38,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash 375641757, now seen corresponding path program 1 times [2024-06-27 19:47:38,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:38,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402164776] [2024-06-27 19:47:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:38,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:40,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:40,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402164776] [2024-06-27 19:47:40,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402164776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:40,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:40,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:40,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236992569] [2024-06-27 19:47:40,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:40,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:40,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:40,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:40,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:40,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:47:40,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1050 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:40,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:40,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:47:40,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:43,252 INFO L124 PetriNetUnfolderBase]: 13750/19350 cut-off events. [2024-06-27 19:47:43,252 INFO L125 PetriNetUnfolderBase]: For 390408/390408 co-relation queries the response was YES. [2024-06-27 19:47:43,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111121 conditions, 19350 events. 13750/19350 cut-off events. For 390408/390408 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 113141 event pairs, 5056 based on Foata normal form. 24/19188 useless extension candidates. Maximal degree in co-relation 111082. Up to 17816 conditions per place. [2024-06-27 19:47:43,409 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 166 selfloop transitions, 36 changer transitions 0/212 dead transitions. [2024-06-27 19:47:43,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 212 transitions, 1910 flow [2024-06-27 19:47:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 279 transitions. [2024-06-27 19:47:43,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264150943396226 [2024-06-27 19:47:43,411 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1050 flow. Second operand 10 states and 279 transitions. [2024-06-27 19:47:43,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 212 transitions, 1910 flow [2024-06-27 19:47:43,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 212 transitions, 1843 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:47:43,578 INFO L231 Difference]: Finished difference. Result has 108 places, 136 transitions, 1180 flow [2024-06-27 19:47:43,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1180, PETRI_PLACES=108, PETRI_TRANSITIONS=136} [2024-06-27 19:47:43,579 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-27 19:47:43,579 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 136 transitions, 1180 flow [2024-06-27 19:47:43,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:43,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:43,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:43,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:47:43,579 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)] === [2024-06-27 19:47:43,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash 375702207, now seen corresponding path program 2 times [2024-06-27 19:47:43,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:43,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737538781] [2024-06-27 19:47:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:43,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:45,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:45,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737538781] [2024-06-27 19:47:45,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737538781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:45,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:45,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:45,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30523244] [2024-06-27 19:47:45,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:45,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:45,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:45,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:45,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:47:45,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 136 transitions, 1180 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:45,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:45,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:47:45,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:48,191 INFO L124 PetriNetUnfolderBase]: 13628/19264 cut-off events. [2024-06-27 19:47:48,191 INFO L125 PetriNetUnfolderBase]: For 426731/426731 co-relation queries the response was YES. [2024-06-27 19:47:48,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112611 conditions, 19264 events. 13628/19264 cut-off events. For 426731/426731 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 113204 event pairs, 5686 based on Foata normal form. 36/19168 useless extension candidates. Maximal degree in co-relation 112571. Up to 17916 conditions per place. [2024-06-27 19:47:48,392 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 163 selfloop transitions, 32 changer transitions 0/205 dead transitions. [2024-06-27 19:47:48,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 205 transitions, 1780 flow [2024-06-27 19:47:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-06-27 19:47:48,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-27 19:47:48,394 INFO L175 Difference]: Start difference. First operand has 108 places, 136 transitions, 1180 flow. Second operand 10 states and 272 transitions. [2024-06-27 19:47:48,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 205 transitions, 1780 flow [2024-06-27 19:47:48,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 205 transitions, 1709 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:48,681 INFO L231 Difference]: Finished difference. Result has 112 places, 136 transitions, 1186 flow [2024-06-27 19:47:48,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1186, PETRI_PLACES=112, PETRI_TRANSITIONS=136} [2024-06-27 19:47:48,681 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-27 19:47:48,681 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 136 transitions, 1186 flow [2024-06-27 19:47:48,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:48,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:48,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:48,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:47:48,682 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)] === [2024-06-27 19:47:48,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash 493789887, now seen corresponding path program 3 times [2024-06-27 19:47:48,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:48,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565146545] [2024-06-27 19:47:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:48,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:50,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:50,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565146545] [2024-06-27 19:47:50,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565146545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:50,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:50,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:50,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523686449] [2024-06-27 19:47:50,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:50,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:50,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:50,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:50,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:47:50,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 136 transitions, 1186 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:50,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:50,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:47:50,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:53,003 INFO L124 PetriNetUnfolderBase]: 13761/19538 cut-off events. [2024-06-27 19:47:53,003 INFO L125 PetriNetUnfolderBase]: For 457897/457901 co-relation queries the response was YES. [2024-06-27 19:47:53,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115470 conditions, 19538 events. 13761/19538 cut-off events. For 457897/457901 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 115663 event pairs, 5258 based on Foata normal form. 34/19494 useless extension candidates. Maximal degree in co-relation 115428. Up to 17972 conditions per place. [2024-06-27 19:47:53,192 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 131 selfloop transitions, 57 changer transitions 0/198 dead transitions. [2024-06-27 19:47:53,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 198 transitions, 1918 flow [2024-06-27 19:47:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-27 19:47:53,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241090146750524 [2024-06-27 19:47:53,195 INFO L175 Difference]: Start difference. First operand has 112 places, 136 transitions, 1186 flow. Second operand 9 states and 250 transitions. [2024-06-27 19:47:53,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 198 transitions, 1918 flow [2024-06-27 19:47:53,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 198 transitions, 1846 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:47:53,389 INFO L231 Difference]: Finished difference. Result has 112 places, 138 transitions, 1302 flow [2024-06-27 19:47:53,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1302, PETRI_PLACES=112, PETRI_TRANSITIONS=138} [2024-06-27 19:47:53,389 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-27 19:47:53,389 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 138 transitions, 1302 flow [2024-06-27 19:47:53,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:53,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:53,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:53,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:47:53,390 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:47:53,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash 848397649, now seen corresponding path program 1 times [2024-06-27 19:47:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:53,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490228917] [2024-06-27 19:47:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:54,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:54,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490228917] [2024-06-27 19:47:54,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490228917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:54,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:54,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:54,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229418471] [2024-06-27 19:47:54,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:54,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:47:54,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 138 transitions, 1302 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:54,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:54,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:47:54,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:57,414 INFO L124 PetriNetUnfolderBase]: 14218/20040 cut-off events. [2024-06-27 19:47:57,414 INFO L125 PetriNetUnfolderBase]: For 504213/504217 co-relation queries the response was YES. [2024-06-27 19:47:57,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121281 conditions, 20040 events. 14218/20040 cut-off events. For 504213/504217 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 115599 event pairs, 5859 based on Foata normal form. 8/19941 useless extension candidates. Maximal degree in co-relation 121238. Up to 18930 conditions per place. [2024-06-27 19:47:57,912 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 147 selfloop transitions, 35 changer transitions 0/190 dead transitions. [2024-06-27 19:47:57,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 190 transitions, 1887 flow [2024-06-27 19:47:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:47:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:47:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:47:57,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2024-06-27 19:47:57,913 INFO L175 Difference]: Start difference. First operand has 112 places, 138 transitions, 1302 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:47:57,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 190 transitions, 1887 flow [2024-06-27 19:47:58,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 190 transitions, 1747 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 19:47:58,207 INFO L231 Difference]: Finished difference. Result has 114 places, 145 transitions, 1356 flow [2024-06-27 19:47:58,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1356, PETRI_PLACES=114, PETRI_TRANSITIONS=145} [2024-06-27 19:47:58,207 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-27 19:47:58,207 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 145 transitions, 1356 flow [2024-06-27 19:47:58,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:58,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:58,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:58,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:47:58,208 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)] === [2024-06-27 19:47:58,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:58,208 INFO L85 PathProgramCache]: Analyzing trace with hash 394695097, now seen corresponding path program 1 times [2024-06-27 19:47:58,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:58,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663024757] [2024-06-27 19:47:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:47:58,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:58,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663024757] [2024-06-27 19:47:58,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663024757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:58,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:58,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:47:58,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929531326] [2024-06-27 19:47:58,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:58,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:47:58,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:58,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:47:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:47:59,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:47:59,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 145 transitions, 1356 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:47:59,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:59,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:47:59,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:01,540 INFO L124 PetriNetUnfolderBase]: 14382/20295 cut-off events. [2024-06-27 19:48:01,540 INFO L125 PetriNetUnfolderBase]: For 534257/534298 co-relation queries the response was YES. [2024-06-27 19:48:01,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123803 conditions, 20295 events. 14382/20295 cut-off events. For 534257/534298 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 116931 event pairs, 6568 based on Foata normal form. 11/20260 useless extension candidates. Maximal degree in co-relation 123758. Up to 19390 conditions per place. [2024-06-27 19:48:01,754 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 141 selfloop transitions, 24 changer transitions 0/179 dead transitions. [2024-06-27 19:48:01,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 179 transitions, 1968 flow [2024-06-27 19:48:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:48:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:48:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:48:01,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-27 19:48:01,756 INFO L175 Difference]: Start difference. First operand has 114 places, 145 transitions, 1356 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:48:01,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 179 transitions, 1968 flow [2024-06-27 19:48:02,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 179 transitions, 1838 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:02,068 INFO L231 Difference]: Finished difference. Result has 115 places, 153 transitions, 1420 flow [2024-06-27 19:48:02,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1420, PETRI_PLACES=115, PETRI_TRANSITIONS=153} [2024-06-27 19:48:02,068 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-27 19:48:02,068 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 153 transitions, 1420 flow [2024-06-27 19:48:02,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:02,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:02,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:02,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:48:02,069 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:48:02,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:02,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1061711641, now seen corresponding path program 2 times [2024-06-27 19:48:02,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:02,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91849520] [2024-06-27 19:48:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:02,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:03,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:03,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91849520] [2024-06-27 19:48:03,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91849520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:03,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:03,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:48:03,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058997421] [2024-06-27 19:48:03,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:03,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:48:03,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:48:03,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:48:03,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:48:03,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 153 transitions, 1420 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:03,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:03,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:48:03,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:06,373 INFO L124 PetriNetUnfolderBase]: 14322/20266 cut-off events. [2024-06-27 19:48:06,373 INFO L125 PetriNetUnfolderBase]: For 588069/588069 co-relation queries the response was YES. [2024-06-27 19:48:06,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129560 conditions, 20266 events. 14322/20266 cut-off events. For 588069/588069 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 117575 event pairs, 5949 based on Foata normal form. 6/20164 useless extension candidates. Maximal degree in co-relation 129514. Up to 19114 conditions per place. [2024-06-27 19:48:06,538 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 163 selfloop transitions, 28 changer transitions 0/201 dead transitions. [2024-06-27 19:48:06,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 201 transitions, 2024 flow [2024-06-27 19:48:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:48:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:48:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:48:06,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-27 19:48:06,539 INFO L175 Difference]: Start difference. First operand has 115 places, 153 transitions, 1420 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:48:06,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 201 transitions, 2024 flow [2024-06-27 19:48:06,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 201 transitions, 1962 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 19:48:06,910 INFO L231 Difference]: Finished difference. Result has 122 places, 160 transitions, 1556 flow [2024-06-27 19:48:06,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1556, PETRI_PLACES=122, PETRI_TRANSITIONS=160} [2024-06-27 19:48:06,911 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-27 19:48:06,911 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 160 transitions, 1556 flow [2024-06-27 19:48:06,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:06,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:06,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:06,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:48:06,911 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:48:06,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:06,912 INFO L85 PathProgramCache]: Analyzing trace with hash -825536281, now seen corresponding path program 3 times [2024-06-27 19:48:06,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:06,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76613191] [2024-06-27 19:48:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:06,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:08,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:08,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76613191] [2024-06-27 19:48:08,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76613191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:08,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:08,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:48:08,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981482852] [2024-06-27 19:48:08,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:08,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:48:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:08,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:48:08,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:48:08,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:48:08,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 160 transitions, 1556 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:08,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:08,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:48:08,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:11,644 INFO L124 PetriNetUnfolderBase]: 14358/20318 cut-off events. [2024-06-27 19:48:11,644 INFO L125 PetriNetUnfolderBase]: For 644279/644279 co-relation queries the response was YES. [2024-06-27 19:48:11,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134449 conditions, 20318 events. 14358/20318 cut-off events. For 644279/644279 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 117741 event pairs, 5984 based on Foata normal form. 6/20216 useless extension candidates. Maximal degree in co-relation 134400. Up to 19173 conditions per place. [2024-06-27 19:48:11,801 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 165 selfloop transitions, 28 changer transitions 0/203 dead transitions. [2024-06-27 19:48:11,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 203 transitions, 2130 flow [2024-06-27 19:48:11,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:48:11,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:48:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:48:11,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2024-06-27 19:48:11,802 INFO L175 Difference]: Start difference. First operand has 122 places, 160 transitions, 1556 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:48:11,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 203 transitions, 2130 flow [2024-06-27 19:48:12,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 203 transitions, 1996 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:12,174 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 1579 flow [2024-06-27 19:48:12,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1579, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-06-27 19:48:12,174 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-27 19:48:12,174 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 1579 flow [2024-06-27 19:48:12,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:12,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:12,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:12,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:48:12,175 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:48:12,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:12,175 INFO L85 PathProgramCache]: Analyzing trace with hash -825536529, now seen corresponding path program 1 times [2024-06-27 19:48:12,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:12,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954120424] [2024-06-27 19:48:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:12,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:13,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:13,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954120424] [2024-06-27 19:48:13,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954120424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:13,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:13,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:48:13,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485889583] [2024-06-27 19:48:13,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:48:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:48:13,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:48:13,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:48:13,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 1579 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:13,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:13,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:48:13,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:16,706 INFO L124 PetriNetUnfolderBase]: 14387/20357 cut-off events. [2024-06-27 19:48:16,706 INFO L125 PetriNetUnfolderBase]: For 695063/695063 co-relation queries the response was YES. [2024-06-27 19:48:16,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137774 conditions, 20357 events. 14387/20357 cut-off events. For 695063/695063 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 117837 event pairs, 6014 based on Foata normal form. 3/20252 useless extension candidates. Maximal degree in co-relation 137724. Up to 19197 conditions per place. [2024-06-27 19:48:16,892 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 164 selfloop transitions, 33 changer transitions 0/207 dead transitions. [2024-06-27 19:48:16,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 207 transitions, 2113 flow [2024-06-27 19:48:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:48:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:48:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:48:16,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-27 19:48:16,895 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 1579 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:48:16,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 207 transitions, 2113 flow [2024-06-27 19:48:17,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 207 transitions, 1940 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:17,328 INFO L231 Difference]: Finished difference. Result has 127 places, 167 transitions, 1530 flow [2024-06-27 19:48:17,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1530, PETRI_PLACES=127, PETRI_TRANSITIONS=167} [2024-06-27 19:48:17,328 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-27 19:48:17,329 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 167 transitions, 1530 flow [2024-06-27 19:48:17,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:17,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:17,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:17,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:48:17,329 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:48:17,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1061896339, now seen corresponding path program 4 times [2024-06-27 19:48:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:17,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150884954] [2024-06-27 19:48:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:17,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:18,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:18,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150884954] [2024-06-27 19:48:18,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150884954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:18,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:18,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:48:18,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312716668] [2024-06-27 19:48:18,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:18,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:48:18,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:18,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:48:18,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:48:18,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 19:48:18,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 167 transitions, 1530 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:18,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:18,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 19:48:18,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:21,906 INFO L124 PetriNetUnfolderBase]: 13981/19957 cut-off events. [2024-06-27 19:48:21,906 INFO L125 PetriNetUnfolderBase]: For 732742/732742 co-relation queries the response was YES. [2024-06-27 19:48:21,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135739 conditions, 19957 events. 13981/19957 cut-off events. For 732742/732742 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 118899 event pairs, 5467 based on Foata normal form. 36/19877 useless extension candidates. Maximal degree in co-relation 135688. Up to 18323 conditions per place. [2024-06-27 19:48:22,089 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 159 selfloop transitions, 49 changer transitions 0/222 dead transitions. [2024-06-27 19:48:22,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 222 transitions, 2186 flow [2024-06-27 19:48:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:48:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:48:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-27 19:48:22,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010482180293501 [2024-06-27 19:48:22,090 INFO L175 Difference]: Start difference. First operand has 127 places, 167 transitions, 1530 flow. Second operand 9 states and 239 transitions. [2024-06-27 19:48:22,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 222 transitions, 2186 flow [2024-06-27 19:48:22,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 222 transitions, 2114 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:22,415 INFO L231 Difference]: Finished difference. Result has 129 places, 169 transitions, 1648 flow [2024-06-27 19:48:22,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1648, PETRI_PLACES=129, PETRI_TRANSITIONS=169} [2024-06-27 19:48:22,416 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-27 19:48:22,416 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 169 transitions, 1648 flow [2024-06-27 19:48:22,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:22,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:22,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:22,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:48:22,416 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:48:22,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash -262933919, now seen corresponding path program 4 times [2024-06-27 19:48:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:22,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142169957] [2024-06-27 19:48:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:22,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:23,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:23,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142169957] [2024-06-27 19:48:23,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142169957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:23,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:23,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:48:23,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994203473] [2024-06-27 19:48:23,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:23,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:48:23,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:48:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:48:23,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:48:23,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 169 transitions, 1648 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:23,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:23,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:48:23,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:26,893 INFO L124 PetriNetUnfolderBase]: 14419/20413 cut-off events. [2024-06-27 19:48:26,893 INFO L125 PetriNetUnfolderBase]: For 782690/782690 co-relation queries the response was YES. [2024-06-27 19:48:26,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141869 conditions, 20413 events. 14419/20413 cut-off events. For 782690/782690 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 118407 event pairs, 5838 based on Foata normal form. 6/20311 useless extension candidates. Maximal degree in co-relation 141817. Up to 19283 conditions per place. [2024-06-27 19:48:27,084 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 179 selfloop transitions, 23 changer transitions 0/212 dead transitions. [2024-06-27 19:48:27,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 212 transitions, 2248 flow [2024-06-27 19:48:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:48:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:48:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:48:27,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740566037735849 [2024-06-27 19:48:27,085 INFO L175 Difference]: Start difference. First operand has 129 places, 169 transitions, 1648 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:48:27,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 212 transitions, 2248 flow [2024-06-27 19:48:27,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 212 transitions, 2112 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:27,541 INFO L231 Difference]: Finished difference. Result has 130 places, 172 transitions, 1668 flow [2024-06-27 19:48:27,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1668, PETRI_PLACES=130, PETRI_TRANSITIONS=172} [2024-06-27 19:48:27,542 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-27 19:48:27,542 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 172 transitions, 1668 flow [2024-06-27 19:48:27,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:27,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:27,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:27,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:48:27,543 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:48:27,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1237291837, now seen corresponding path program 2 times [2024-06-27 19:48:27,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:27,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517359867] [2024-06-27 19:48:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:27,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:28,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:28,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517359867] [2024-06-27 19:48:28,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517359867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:28,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:28,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:48:28,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526169626] [2024-06-27 19:48:28,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:28,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:48:28,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:28,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:48:28,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:48:28,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 19:48:28,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 172 transitions, 1668 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:28,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:28,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 19:48:28,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:31,462 INFO L124 PetriNetUnfolderBase]: 14471/20445 cut-off events. [2024-06-27 19:48:31,462 INFO L125 PetriNetUnfolderBase]: For 815293/815304 co-relation queries the response was YES. [2024-06-27 19:48:31,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140561 conditions, 20445 events. 14471/20445 cut-off events. For 815293/815304 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 117814 event pairs, 6562 based on Foata normal form. 7/20436 useless extension candidates. Maximal degree in co-relation 140508. Up to 19560 conditions per place. [2024-06-27 19:48:31,670 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 158 selfloop transitions, 14 changer transitions 0/190 dead transitions. [2024-06-27 19:48:31,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 190 transitions, 2058 flow [2024-06-27 19:48:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:48:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:48:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:48:31,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559748427672956 [2024-06-27 19:48:31,672 INFO L175 Difference]: Start difference. First operand has 130 places, 172 transitions, 1668 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:48:31,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 190 transitions, 2058 flow [2024-06-27 19:48:32,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 190 transitions, 1894 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:32,227 INFO L231 Difference]: Finished difference. Result has 130 places, 172 transitions, 1541 flow [2024-06-27 19:48:32,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1541, PETRI_PLACES=130, PETRI_TRANSITIONS=172} [2024-06-27 19:48:32,228 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-27 19:48:32,228 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 172 transitions, 1541 flow [2024-06-27 19:48:32,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:32,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:32,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:32,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:48:32,229 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:48:32,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:32,229 INFO L85 PathProgramCache]: Analyzing trace with hash 400414969, now seen corresponding path program 1 times [2024-06-27 19:48:32,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:32,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214019156] [2024-06-27 19:48:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:32,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:48:33,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:33,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214019156] [2024-06-27 19:48:33,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214019156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:33,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:33,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:48:33,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630106583] [2024-06-27 19:48:33,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:33,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:48:33,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:48:33,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:48:33,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 19:48:33,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 172 transitions, 1541 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:48:33,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:33,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 19:48:33,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand