./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix017_pso.opt_tso.opt.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/mix017_pso.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix017_pso.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:03:50,496 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:03:50,571 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:03:50,575 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:03:50,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:03:50,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:03:50,599 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:03:50,600 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:03:50,600 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:03:50,603 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:03:50,603 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:03:50,604 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:03:50,604 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:03:50,605 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:03:50,605 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:03:50,606 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:03:50,606 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:03:50,606 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:03:50,606 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:03:50,607 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:03:50,607 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:03:50,607 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:03:50,607 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:03:50,607 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:03:50,608 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:03:50,608 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:03:50,608 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:03:50,608 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:03:50,609 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:03:50,609 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:03:50,610 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:03:50,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:03:50,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:03:50,610 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:03:50,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:03:50,611 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:03:50,611 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:03:50,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:03:50,611 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:03:50,611 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:03:50,611 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:03:50,612 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:03:50,612 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:03:50,612 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:03:50,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:03:50,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:03:50,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:03:50,853 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:03:50,853 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:03:50,854 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i [2024-06-27 20:03:51,848 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:03:52,063 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:03:52,072 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i [2024-06-27 20:03:52,090 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d98a35d/d6312bc6837e4d76b8f2b364a259eabd/FLAG901251e8c [2024-06-27 20:03:52,105 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d98a35d/d6312bc6837e4d76b8f2b364a259eabd [2024-06-27 20:03:52,107 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:03:52,107 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:03:52,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix017_pso.opt_tso.opt.yml/witness.yml [2024-06-27 20:03:52,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:03:52,285 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:03:52,286 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:03:52,286 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:03:52,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:03:52,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:03:52" (1/2) ... [2024-06-27 20:03:52,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77aa7794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:03:52, skipping insertion in model container [2024-06-27 20:03:52,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:03:52" (1/2) ... [2024-06-27 20:03:52,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54727596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:03:52, skipping insertion in model container [2024-06-27 20:03:52,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:03:52" (2/2) ... [2024-06-27 20:03:52,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77aa7794 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52, skipping insertion in model container [2024-06-27 20:03:52,293 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:03:52" (2/2) ... [2024-06-27 20:03:52,294 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:03:52,398 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:03:52,399 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 20:03:52,399 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 20:03:52,399 INFO L97 edCorrectnessWitness]: Location invariant before [L873-L873] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 20:03:52,399 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-27 20:03:52,400 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:03:52,400 INFO L106 edCorrectnessWitness]: ghost_update [L867-L867] multithreaded = 1; [2024-06-27 20:03:52,484 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:03:52,759 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:03:52,770 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 20:03:52,889 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:03:52,928 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:03:52,929 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52 WrapperNode [2024-06-27 20:03:52,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:03:52,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:03:52,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:03:52,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:03:52,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:52,963 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:52,997 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 162 [2024-06-27 20:03:52,997 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:03:52,998 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:03:52,998 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:03:52,999 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:03:53,007 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:53,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:53,023 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:53,052 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 20:03:53,057 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:53,057 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:53,064 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:53,066 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:53,068 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:53,069 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:53,072 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:03:53,072 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:03:53,072 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:03:53,073 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:03:53,073 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (1/1) ... [2024-06-27 20:03:53,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:03:53,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:03:53,104 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 20:03:53,125 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 20:03:53,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:03:53,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:03:53,140 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:03:53,140 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:03:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:03:53,141 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:03:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:03:53,141 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:03:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:03:53,141 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:03:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:03:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:03:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:03:53,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:03:53,144 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 20:03:53,281 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:03:53,283 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:03:53,651 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:03:53,651 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:03:53,806 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:03:53,806 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:03:53,806 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:03:53 BoogieIcfgContainer [2024-06-27 20:03:53,806 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:03:53,809 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:03:53,809 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:03:53,811 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:03:53,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:03:52" (1/4) ... [2024-06-27 20:03:53,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbff91d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:03:53, skipping insertion in model container [2024-06-27 20:03:53,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:03:52" (2/4) ... [2024-06-27 20:03:53,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbff91d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:03:53, skipping insertion in model container [2024-06-27 20:03:53,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:03:52" (3/4) ... [2024-06-27 20:03:53,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbff91d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:03:53, skipping insertion in model container [2024-06-27 20:03:53,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:03:53" (4/4) ... [2024-06-27 20:03:53,813 INFO L112 eAbstractionObserver]: Analyzing ICFG mix017_pso.opt_tso.opt.i [2024-06-27 20:03:53,826 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:03:53,826 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:03:53,827 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:03:53,873 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:03:53,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 20:03:53,934 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-27 20:03:53,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:03:53,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:03:53,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 20:03:53,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-27 20:03:53,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:03:53,957 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;@7fc5003c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:03:53,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:03:53,960 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:03:53,960 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:03:53,960 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:03:53,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:53,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:03:53,961 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 20:03:53,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash 417558827, now seen corresponding path program 1 times [2024-06-27 20:03:53,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:53,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677540640] [2024-06-27 20:03:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:53,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:54,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:54,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677540640] [2024-06-27 20:03:54,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677540640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:54,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:54,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:03:54,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879383375] [2024-06-27 20:03:54,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:54,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:03:54,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:54,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:03:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:03:54,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-27 20:03:54,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 20:03:54,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:54,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-27 20:03:54,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:55,653 INFO L124 PetriNetUnfolderBase]: 4867/6987 cut-off events. [2024-06-27 20:03:55,654 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-27 20:03:55,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13899 conditions, 6987 events. 4867/6987 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 39890 event pairs, 3534 based on Foata normal form. 1/6756 useless extension candidates. Maximal degree in co-relation 13886. Up to 6693 conditions per place. [2024-06-27 20:03:55,691 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 40 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-27 20:03:55,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 223 flow [2024-06-27 20:03:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:03:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:03:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-27 20:03:55,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-27 20:03:55,702 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 103 transitions. [2024-06-27 20:03:55,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 223 flow [2024-06-27 20:03:55,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:55,710 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-27 20:03:55,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 20:03:55,714 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-27 20:03:55,714 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-27 20:03:55,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 20:03:55,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:55,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:55,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:03:55,715 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 20:03:55,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:55,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1842098634, now seen corresponding path program 1 times [2024-06-27 20:03:55,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:55,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324429691] [2024-06-27 20:03:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:55,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:56,263 INFO 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 20:03:56,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:56,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324429691] [2024-06-27 20:03:56,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324429691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:56,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:56,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:03:56,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19762900] [2024-06-27 20:03:56,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:56,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:03:56,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:56,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:03:56,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:03:56,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-27 20:03:56,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 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 20:03:56,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:56,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-27 20:03:56,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:57,027 INFO L124 PetriNetUnfolderBase]: 5569/7817 cut-off events. [2024-06-27 20:03:57,028 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2024-06-27 20:03:57,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18004 conditions, 7817 events. 5569/7817 cut-off events. For 1718/1718 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 43560 event pairs, 3437 based on Foata normal form. 4/7793 useless extension candidates. Maximal degree in co-relation 17992. Up to 7610 conditions per place. [2024-06-27 20:03:57,070 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 51 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-27 20:03:57,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 317 flow [2024-06-27 20:03:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:03:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:03:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-27 20:03:57,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-27 20:03:57,072 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 132 transitions. [2024-06-27 20:03:57,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 317 flow [2024-06-27 20:03:57,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:03:57,075 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-27 20:03:57,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-27 20:03:57,075 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-27 20:03:57,075 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-27 20:03:57,076 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 20:03:57,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:57,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:57,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:03:57,076 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 20:03:57,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1164083757, now seen corresponding path program 1 times [2024-06-27 20:03:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:57,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050817534] [2024-06-27 20:03:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:57,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:57,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050817534] [2024-06-27 20:03:57,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050817534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:57,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:57,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:03:57,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858617417] [2024-06-27 20:03:57,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:57,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:03:57,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:03:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:03:58,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-27 20:03:58,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 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 20:03:58,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:58,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-27 20:03:58,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:59,019 INFO L124 PetriNetUnfolderBase]: 7070/9853 cut-off events. [2024-06-27 20:03:59,020 INFO L125 PetriNetUnfolderBase]: For 5873/5873 co-relation queries the response was YES. [2024-06-27 20:03:59,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25287 conditions, 9853 events. 7070/9853 cut-off events. For 5873/5873 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 54646 event pairs, 3323 based on Foata normal form. 8/9824 useless extension candidates. Maximal degree in co-relation 25273. Up to 9556 conditions per place. [2024-06-27 20:03:59,062 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 69 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-27 20:03:59,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 482 flow [2024-06-27 20:03:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:03:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:03:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 20:03:59,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-27 20:03:59,065 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 185 transitions. [2024-06-27 20:03:59,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 482 flow [2024-06-27 20:03:59,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 454 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 20:03:59,068 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-27 20:03:59,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-27 20:03:59,068 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-27 20:03:59,069 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-27 20:03:59,069 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 20:03:59,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:59,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:59,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:03:59,069 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:03:59,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:59,070 INFO L85 PathProgramCache]: Analyzing trace with hash 906520462, now seen corresponding path program 1 times [2024-06-27 20:03:59,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:59,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608510286] [2024-06-27 20:03:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:59,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:59,673 INFO 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 20:03:59,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:59,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608510286] [2024-06-27 20:03:59,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608510286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:59,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:59,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:03:59,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711852042] [2024-06-27 20:03:59,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:59,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:03:59,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:59,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:03:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:03:59,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-27 20:03:59,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:59,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:59,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-27 20:03:59,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:00,654 INFO L124 PetriNetUnfolderBase]: 6156/8808 cut-off events. [2024-06-27 20:04:00,655 INFO L125 PetriNetUnfolderBase]: For 9447/9447 co-relation queries the response was YES. [2024-06-27 20:04:00,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24850 conditions, 8808 events. 6156/8808 cut-off events. For 9447/9447 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 50138 event pairs, 3157 based on Foata normal form. 3/8671 useless extension candidates. Maximal degree in co-relation 24833. Up to 8408 conditions per place. [2024-06-27 20:04:00,703 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 58 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-27 20:04:00,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 443 flow [2024-06-27 20:04:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:04:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:04:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-27 20:04:00,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-27 20:04:00,705 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 135 transitions. [2024-06-27 20:04:00,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 443 flow [2024-06-27 20:04:00,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 405 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:04:00,710 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 264 flow [2024-06-27 20:04:00,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-27 20:04:00,711 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-06-27 20:04:00,711 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 264 flow [2024-06-27 20:04:00,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:00,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:00,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:00,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:04:00,712 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 20:04:00,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash 291940155, now seen corresponding path program 1 times [2024-06-27 20:04:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060264219] [2024-06-27 20:04:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:01,539 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 20:04:01,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:01,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060264219] [2024-06-27 20:04:01,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060264219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:01,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:01,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:04:01,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575968847] [2024-06-27 20:04:01,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:01,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:04:01,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:01,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:04:01,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:04:01,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:01,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 264 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 20:04:01,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:01,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:01,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:02,770 INFO L124 PetriNetUnfolderBase]: 7083/9870 cut-off events. [2024-06-27 20:04:02,770 INFO L125 PetriNetUnfolderBase]: For 17298/17320 co-relation queries the response was YES. [2024-06-27 20:04:02,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30678 conditions, 9870 events. 7083/9870 cut-off events. For 17298/17320 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54694 event pairs, 3545 based on Foata normal form. 5/9854 useless extension candidates. Maximal degree in co-relation 30659. Up to 9589 conditions per place. [2024-06-27 20:04:02,815 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 69 selfloop transitions, 21 changer transitions 0/98 dead transitions. [2024-06-27 20:04:02,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 98 transitions, 600 flow [2024-06-27 20:04:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:04:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:04:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-27 20:04:02,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-27 20:04:02,817 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 264 flow. Second operand 6 states and 164 transitions. [2024-06-27 20:04:02,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 98 transitions, 600 flow [2024-06-27 20:04:02,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 98 transitions, 571 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:04:02,820 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 352 flow [2024-06-27 20:04:02,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-27 20:04:02,821 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-06-27 20:04:02,821 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 352 flow [2024-06-27 20:04:02,821 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 20:04:02,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:02,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:02,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:04:02,822 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 20:04:02,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:02,822 INFO L85 PathProgramCache]: Analyzing trace with hash 314260155, now seen corresponding path program 2 times [2024-06-27 20:04:02,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:02,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105714533] [2024-06-27 20:04:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:02,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:03,484 INFO 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 20:04:03,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:03,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105714533] [2024-06-27 20:04:03,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105714533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:03,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:03,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:04:03,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614398262] [2024-06-27 20:04:03,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:03,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:04:03,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:03,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:04:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:04:03,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:03,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 352 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 20:04:03,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:03,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:03,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:04,584 INFO L124 PetriNetUnfolderBase]: 7074/9873 cut-off events. [2024-06-27 20:04:04,584 INFO L125 PetriNetUnfolderBase]: For 25336/25377 co-relation queries the response was YES. [2024-06-27 20:04:04,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33352 conditions, 9873 events. 7074/9873 cut-off events. For 25336/25377 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54683 event pairs, 3548 based on Foata normal form. 25/9879 useless extension candidates. Maximal degree in co-relation 33332. Up to 9580 conditions per place. [2024-06-27 20:04:04,641 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 63 selfloop transitions, 21 changer transitions 0/92 dead transitions. [2024-06-27 20:04:04,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 582 flow [2024-06-27 20:04:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:04:04,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:04:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 20:04:04,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-27 20:04:04,643 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 352 flow. Second operand 6 states and 158 transitions. [2024-06-27 20:04:04,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 582 flow [2024-06-27 20:04:04,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 536 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 20:04:04,654 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 359 flow [2024-06-27 20:04:04,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-27 20:04:04,655 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-27 20:04:04,655 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 359 flow [2024-06-27 20:04:04,655 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 20:04:04,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:04,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:04,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:04:04,656 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 20:04:04,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash 348028649, now seen corresponding path program 1 times [2024-06-27 20:04:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:04,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299399699] [2024-06-27 20:04:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:04,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:05,399 INFO 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 20:04:05,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299399699] [2024-06-27 20:04:05,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299399699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:05,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:05,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:05,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317123765] [2024-06-27 20:04:05,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:05,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:05,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:05,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:05,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:05,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 359 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 20:04:05,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:05,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:05,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:06,595 INFO L124 PetriNetUnfolderBase]: 7165/10027 cut-off events. [2024-06-27 20:04:06,596 INFO L125 PetriNetUnfolderBase]: For 29083/29121 co-relation queries the response was YES. [2024-06-27 20:04:06,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34242 conditions, 10027 events. 7165/10027 cut-off events. For 29083/29121 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55671 event pairs, 3538 based on Foata normal form. 7/10016 useless extension candidates. Maximal degree in co-relation 34220. Up to 9682 conditions per place. [2024-06-27 20:04:06,649 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 87 selfloop transitions, 32 changer transitions 0/127 dead transitions. [2024-06-27 20:04:06,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 127 transitions, 818 flow [2024-06-27 20:04:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 20:04:06,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120192307692307 [2024-06-27 20:04:06,651 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 359 flow. Second operand 8 states and 213 transitions. [2024-06-27 20:04:06,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 127 transitions, 818 flow [2024-06-27 20:04:06,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 127 transitions, 744 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:06,666 INFO L231 Difference]: Finished difference. Result has 74 places, 87 transitions, 511 flow [2024-06-27 20:04:06,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=511, PETRI_PLACES=74, PETRI_TRANSITIONS=87} [2024-06-27 20:04:06,666 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-27 20:04:06,666 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 87 transitions, 511 flow [2024-06-27 20:04:06,667 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 20:04:06,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:06,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:06,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:04:06,667 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 20:04:06,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash 82437633, now seen corresponding path program 2 times [2024-06-27 20:04:06,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:06,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207455948] [2024-06-27 20:04:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:06,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:07,514 INFO 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 20:04:07,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:07,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207455948] [2024-06-27 20:04:07,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207455948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:07,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:07,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132458231] [2024-06-27 20:04:07,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:07,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:07,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:07,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:07,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:07,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:07,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 511 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 20:04:07,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:07,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:07,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:08,948 INFO L124 PetriNetUnfolderBase]: 7187/10056 cut-off events. [2024-06-27 20:04:08,948 INFO L125 PetriNetUnfolderBase]: For 39663/39727 co-relation queries the response was YES. [2024-06-27 20:04:08,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37264 conditions, 10056 events. 7187/10056 cut-off events. For 39663/39727 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55536 event pairs, 3508 based on Foata normal form. 11/10047 useless extension candidates. Maximal degree in co-relation 37240. Up to 9689 conditions per place. [2024-06-27 20:04:09,010 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 87 selfloop transitions, 34 changer transitions 0/129 dead transitions. [2024-06-27 20:04:09,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 923 flow [2024-06-27 20:04:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 20:04:09,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137362637362637 [2024-06-27 20:04:09,012 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 511 flow. Second operand 7 states and 187 transitions. [2024-06-27 20:04:09,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 923 flow [2024-06-27 20:04:09,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 129 transitions, 865 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 20:04:09,028 INFO L231 Difference]: Finished difference. Result has 78 places, 91 transitions, 588 flow [2024-06-27 20:04:09,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=78, PETRI_TRANSITIONS=91} [2024-06-27 20:04:09,028 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-06-27 20:04:09,028 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 91 transitions, 588 flow [2024-06-27 20:04:09,029 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 20:04:09,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:09,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:09,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:04:09,029 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 20:04:09,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash -608587727, now seen corresponding path program 3 times [2024-06-27 20:04:09,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:09,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065259814] [2024-06-27 20:04:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:09,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:09,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:09,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065259814] [2024-06-27 20:04:09,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065259814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:09,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:09,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:09,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875047836] [2024-06-27 20:04:09,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:09,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:09,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:09,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:09,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:09,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:09,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 91 transitions, 588 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 20:04:09,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:09,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:09,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:11,075 INFO L124 PetriNetUnfolderBase]: 7209/10083 cut-off events. [2024-06-27 20:04:11,075 INFO L125 PetriNetUnfolderBase]: For 51784/51842 co-relation queries the response was YES. [2024-06-27 20:04:11,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40139 conditions, 10083 events. 7209/10083 cut-off events. For 51784/51842 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55972 event pairs, 3397 based on Foata normal form. 21/10085 useless extension candidates. Maximal degree in co-relation 40114. Up to 9633 conditions per place. [2024-06-27 20:04:11,133 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 77 selfloop transitions, 50 changer transitions 0/135 dead transitions. [2024-06-27 20:04:11,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 135 transitions, 1100 flow [2024-06-27 20:04:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 20:04:11,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2024-06-27 20:04:11,134 INFO L175 Difference]: Start difference. First operand has 78 places, 91 transitions, 588 flow. Second operand 7 states and 191 transitions. [2024-06-27 20:04:11,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 135 transitions, 1100 flow [2024-06-27 20:04:11,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 135 transitions, 981 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:11,157 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 694 flow [2024-06-27 20:04:11,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2024-06-27 20:04:11,158 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-27 20:04:11,158 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 694 flow [2024-06-27 20:04:11,158 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 20:04:11,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:11,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:11,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:04:11,159 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 20:04:11,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:11,159 INFO L85 PathProgramCache]: Analyzing trace with hash 90482113, now seen corresponding path program 4 times [2024-06-27 20:04:11,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:11,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806201498] [2024-06-27 20:04:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:11,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:11,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:11,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806201498] [2024-06-27 20:04:11,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806201498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:11,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:11,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:11,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983937032] [2024-06-27 20:04:11,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:11,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:11,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:11,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:11,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:12,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:12,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 694 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 20:04:12,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:12,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:12,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:13,247 INFO L124 PetriNetUnfolderBase]: 7200/10084 cut-off events. [2024-06-27 20:04:13,247 INFO L125 PetriNetUnfolderBase]: For 52623/52683 co-relation queries the response was YES. [2024-06-27 20:04:13,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40084 conditions, 10084 events. 7200/10084 cut-off events. For 52623/52683 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 56082 event pairs, 3404 based on Foata normal form. 19/10081 useless extension candidates. Maximal degree in co-relation 40058. Up to 9624 conditions per place. [2024-06-27 20:04:13,302 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 72 selfloop transitions, 50 changer transitions 0/130 dead transitions. [2024-06-27 20:04:13,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 130 transitions, 1036 flow [2024-06-27 20:04:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 20:04:13,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082417582417582 [2024-06-27 20:04:13,303 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 694 flow. Second operand 7 states and 185 transitions. [2024-06-27 20:04:13,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 130 transitions, 1036 flow [2024-06-27 20:04:13,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 130 transitions, 953 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 20:04:13,325 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 722 flow [2024-06-27 20:04:13,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=722, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-27 20:04:13,326 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-27 20:04:13,326 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 722 flow [2024-06-27 20:04:13,326 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 20:04:13,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:13,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:13,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:04:13,327 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 20:04:13,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash -601912373, now seen corresponding path program 1 times [2024-06-27 20:04:13,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:13,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83846919] [2024-06-27 20:04:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:13,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:14,129 INFO 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 20:04:14,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:14,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83846919] [2024-06-27 20:04:14,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83846919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:14,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:14,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:14,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48435552] [2024-06-27 20:04:14,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:14,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:14,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:14,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:14,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:14,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:14,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 722 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 20:04:14,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:14,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:14,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:15,520 INFO L124 PetriNetUnfolderBase]: 8032/11403 cut-off events. [2024-06-27 20:04:15,520 INFO L125 PetriNetUnfolderBase]: For 61254/61256 co-relation queries the response was YES. [2024-06-27 20:04:15,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44880 conditions, 11403 events. 8032/11403 cut-off events. For 61254/61256 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 63687 event pairs, 3736 based on Foata normal form. 6/11304 useless extension candidates. Maximal degree in co-relation 44852. Up to 10879 conditions per place. [2024-06-27 20:04:15,577 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 113 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-06-27 20:04:15,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 1147 flow [2024-06-27 20:04:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 20:04:15,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-27 20:04:15,578 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 722 flow. Second operand 7 states and 181 transitions. [2024-06-27 20:04:15,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 1147 flow [2024-06-27 20:04:15,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 138 transitions, 1006 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:15,605 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 703 flow [2024-06-27 20:04:15,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=703, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-27 20:04:15,605 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-27 20:04:15,605 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 703 flow [2024-06-27 20:04:15,606 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 20:04:15,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:15,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:15,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:04:15,606 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 20:04:15,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash -520331166, now seen corresponding path program 1 times [2024-06-27 20:04:15,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:15,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39896751] [2024-06-27 20:04:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:15,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:16,162 INFO 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 20:04:16,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:16,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39896751] [2024-06-27 20:04:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39896751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:16,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:04:16,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489328705] [2024-06-27 20:04:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:04:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:04:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:04:16,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-27 20:04:16,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 703 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:16,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:16,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-27 20:04:16,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:17,301 INFO L124 PetriNetUnfolderBase]: 7529/11015 cut-off events. [2024-06-27 20:04:17,301 INFO L125 PetriNetUnfolderBase]: For 72649/72669 co-relation queries the response was YES. [2024-06-27 20:04:17,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45671 conditions, 11015 events. 7529/11015 cut-off events. For 72649/72669 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 64520 event pairs, 3781 based on Foata normal form. 22/10994 useless extension candidates. Maximal degree in co-relation 45641. Up to 10255 conditions per place. [2024-06-27 20:04:17,473 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 102 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-27 20:04:17,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 125 transitions, 1009 flow [2024-06-27 20:04:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:04:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:04:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-27 20:04:17,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-06-27 20:04:17,474 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 703 flow. Second operand 5 states and 132 transitions. [2024-06-27 20:04:17,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 125 transitions, 1009 flow [2024-06-27 20:04:17,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 949 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:17,509 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 716 flow [2024-06-27 20:04:17,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=716, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2024-06-27 20:04:17,509 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-27 20:04:17,510 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 716 flow [2024-06-27 20:04:17,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:17,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:17,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:17,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:04:17,510 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 20:04:17,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:17,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1910335936, now seen corresponding path program 1 times [2024-06-27 20:04:17,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:17,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598341087] [2024-06-27 20:04:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:17,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:18,450 INFO 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 20:04:18,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:18,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598341087] [2024-06-27 20:04:18,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598341087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:18,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:18,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:18,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301375241] [2024-06-27 20:04:18,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:18,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:18,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:18,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:18,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:18,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:18,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 716 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 20:04:18,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:18,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:18,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:20,271 INFO L124 PetriNetUnfolderBase]: 9228/12909 cut-off events. [2024-06-27 20:04:20,272 INFO L125 PetriNetUnfolderBase]: For 110617/110673 co-relation queries the response was YES. [2024-06-27 20:04:20,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59095 conditions, 12909 events. 9228/12909 cut-off events. For 110617/110673 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 72758 event pairs, 3328 based on Foata normal form. 42/12949 useless extension candidates. Maximal degree in co-relation 59064. Up to 12078 conditions per place. [2024-06-27 20:04:20,345 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 126 selfloop transitions, 41 changer transitions 0/176 dead transitions. [2024-06-27 20:04:20,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 176 transitions, 1404 flow [2024-06-27 20:04:20,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 20:04:20,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2024-06-27 20:04:20,347 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 716 flow. Second operand 9 states and 244 transitions. [2024-06-27 20:04:20,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 176 transitions, 1404 flow [2024-06-27 20:04:20,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 176 transitions, 1361 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 20:04:20,385 INFO L231 Difference]: Finished difference. Result has 93 places, 114 transitions, 844 flow [2024-06-27 20:04:20,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=844, PETRI_PLACES=93, PETRI_TRANSITIONS=114} [2024-06-27 20:04:20,386 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-27 20:04:20,386 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 114 transitions, 844 flow [2024-06-27 20:04:20,386 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 20:04:20,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:20,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:20,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:04:20,387 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 20:04:20,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash -233731230, now seen corresponding path program 2 times [2024-06-27 20:04:20,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:20,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271506152] [2024-06-27 20:04:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:20,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:21,349 INFO 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 20:04:21,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:21,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271506152] [2024-06-27 20:04:21,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271506152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:21,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:21,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:21,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369970040] [2024-06-27 20:04:21,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:21,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:21,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:21,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:21,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 114 transitions, 844 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 20:04:21,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:21,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:21,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:23,189 INFO L124 PetriNetUnfolderBase]: 9174/12847 cut-off events. [2024-06-27 20:04:23,189 INFO L125 PetriNetUnfolderBase]: For 126044/126100 co-relation queries the response was YES. [2024-06-27 20:04:23,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60528 conditions, 12847 events. 9174/12847 cut-off events. For 126044/126100 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 72531 event pairs, 3828 based on Foata normal form. 48/12893 useless extension candidates. Maximal degree in co-relation 60496. Up to 12228 conditions per place. [2024-06-27 20:04:23,286 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 118 selfloop transitions, 36 changer transitions 0/163 dead transitions. [2024-06-27 20:04:23,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 163 transitions, 1324 flow [2024-06-27 20:04:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 20:04:23,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-27 20:04:23,289 INFO L175 Difference]: Start difference. First operand has 93 places, 114 transitions, 844 flow. Second operand 8 states and 214 transitions. [2024-06-27 20:04:23,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 163 transitions, 1324 flow [2024-06-27 20:04:23,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 163 transitions, 1255 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:23,344 INFO L231 Difference]: Finished difference. Result has 96 places, 114 transitions, 859 flow [2024-06-27 20:04:23,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=859, PETRI_PLACES=96, PETRI_TRANSITIONS=114} [2024-06-27 20:04:23,345 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-27 20:04:23,345 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 114 transitions, 859 flow [2024-06-27 20:04:23,346 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 20:04:23,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:23,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:23,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:04:23,346 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 20:04:23,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:23,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2028484066, now seen corresponding path program 3 times [2024-06-27 20:04:23,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:23,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996526407] [2024-06-27 20:04:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:23,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:24,346 INFO 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 20:04:24,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:24,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996526407] [2024-06-27 20:04:24,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996526407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:24,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:24,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:24,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735026956] [2024-06-27 20:04:24,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:24,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:24,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:24,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:24,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:24,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:24,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 114 transitions, 859 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 20:04:24,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:24,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:24,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:26,153 INFO L124 PetriNetUnfolderBase]: 9280/13018 cut-off events. [2024-06-27 20:04:26,153 INFO L125 PetriNetUnfolderBase]: For 139547/139589 co-relation queries the response was YES. [2024-06-27 20:04:26,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62376 conditions, 13018 events. 9280/13018 cut-off events. For 139547/139589 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 73988 event pairs, 3878 based on Foata normal form. 56/13067 useless extension candidates. Maximal degree in co-relation 62342. Up to 12301 conditions per place. [2024-06-27 20:04:26,228 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 96 selfloop transitions, 55 changer transitions 0/160 dead transitions. [2024-06-27 20:04:26,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 160 transitions, 1351 flow [2024-06-27 20:04:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 20:04:26,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168269230769231 [2024-06-27 20:04:26,230 INFO L175 Difference]: Start difference. First operand has 96 places, 114 transitions, 859 flow. Second operand 8 states and 215 transitions. [2024-06-27 20:04:26,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 160 transitions, 1351 flow [2024-06-27 20:04:26,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 160 transitions, 1269 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:26,281 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 943 flow [2024-06-27 20:04:26,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-27 20:04:26,282 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-27 20:04:26,282 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 943 flow [2024-06-27 20:04:26,282 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 20:04:26,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:26,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:26,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:04:26,282 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 20:04:26,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2028668764, now seen corresponding path program 1 times [2024-06-27 20:04:26,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:26,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545804278] [2024-06-27 20:04:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:26,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:27,178 INFO 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 20:04:27,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:27,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545804278] [2024-06-27 20:04:27,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545804278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:27,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:27,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:27,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877613114] [2024-06-27 20:04:27,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:27,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:27,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:27,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:27,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:27,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:04:27,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 943 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 20:04:27,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:27,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:04:27,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:28,913 INFO L124 PetriNetUnfolderBase]: 9660/13488 cut-off events. [2024-06-27 20:04:28,913 INFO L125 PetriNetUnfolderBase]: For 158809/158817 co-relation queries the response was YES. [2024-06-27 20:04:28,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64891 conditions, 13488 events. 9660/13488 cut-off events. For 158809/158817 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 74249 event pairs, 4192 based on Foata normal form. 14/13497 useless extension candidates. Maximal degree in co-relation 64856. Up to 13013 conditions per place. [2024-06-27 20:04:29,017 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 126 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-27 20:04:29,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 168 transitions, 1494 flow [2024-06-27 20:04:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 20:04:29,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-27 20:04:29,018 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 943 flow. Second operand 8 states and 206 transitions. [2024-06-27 20:04:29,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 168 transitions, 1494 flow [2024-06-27 20:04:29,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 168 transitions, 1364 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:29,113 INFO L231 Difference]: Finished difference. Result has 100 places, 123 transitions, 986 flow [2024-06-27 20:04:29,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=986, PETRI_PLACES=100, PETRI_TRANSITIONS=123} [2024-06-27 20:04:29,114 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-27 20:04:29,114 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 123 transitions, 986 flow [2024-06-27 20:04:29,115 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 20:04:29,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:29,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:29,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:04:29,116 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:04:29,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:29,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2132625757, now seen corresponding path program 1 times [2024-06-27 20:04:29,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:29,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188731476] [2024-06-27 20:04:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:29,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:29,800 INFO 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 20:04:29,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:29,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188731476] [2024-06-27 20:04:29,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188731476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:29,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:29,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:04:29,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117064671] [2024-06-27 20:04:29,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:29,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:04:29,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:04:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:04:29,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:29,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 123 transitions, 986 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:29,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:29,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:29,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:31,288 INFO L124 PetriNetUnfolderBase]: 9163/12970 cut-off events. [2024-06-27 20:04:31,288 INFO L125 PetriNetUnfolderBase]: For 178060/178077 co-relation queries the response was YES. [2024-06-27 20:04:31,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65538 conditions, 12970 events. 9163/12970 cut-off events. For 178060/178077 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73391 event pairs, 4079 based on Foata normal form. 23/12968 useless extension candidates. Maximal degree in co-relation 65501. Up to 12327 conditions per place. [2024-06-27 20:04:31,388 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 110 selfloop transitions, 35 changer transitions 0/159 dead transitions. [2024-06-27 20:04:31,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1514 flow [2024-06-27 20:04:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:04:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:04:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 20:04:31,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-27 20:04:31,390 INFO L175 Difference]: Start difference. First operand has 100 places, 123 transitions, 986 flow. Second operand 6 states and 162 transitions. [2024-06-27 20:04:31,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1514 flow [2024-06-27 20:04:31,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 159 transitions, 1404 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:31,474 INFO L231 Difference]: Finished difference. Result has 101 places, 131 transitions, 1063 flow [2024-06-27 20:04:31,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1063, PETRI_PLACES=101, PETRI_TRANSITIONS=131} [2024-06-27 20:04:31,475 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-27 20:04:31,475 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 131 transitions, 1063 flow [2024-06-27 20:04:31,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:31,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:31,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:31,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:04:31,475 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:04:31,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1146173714, now seen corresponding path program 4 times [2024-06-27 20:04:31,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:31,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491663004] [2024-06-27 20:04:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:31,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:32,356 INFO 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 20:04:32,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:32,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491663004] [2024-06-27 20:04:32,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491663004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:32,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:32,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:32,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701916710] [2024-06-27 20:04:32,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:32,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:32,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:32,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:32,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:32,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:32,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 131 transitions, 1063 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 20:04:32,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:32,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:32,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:34,175 INFO L124 PetriNetUnfolderBase]: 9352/13187 cut-off events. [2024-06-27 20:04:34,175 INFO L125 PetriNetUnfolderBase]: For 205612/205656 co-relation queries the response was YES. [2024-06-27 20:04:34,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70096 conditions, 13187 events. 9352/13187 cut-off events. For 205612/205656 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 75047 event pairs, 4002 based on Foata normal form. 62/13241 useless extension candidates. Maximal degree in co-relation 70058. Up to 12400 conditions per place. [2024-06-27 20:04:34,284 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 108 selfloop transitions, 57 changer transitions 0/175 dead transitions. [2024-06-27 20:04:34,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 175 transitions, 1589 flow [2024-06-27 20:04:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 20:04:34,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-27 20:04:34,285 INFO L175 Difference]: Start difference. First operand has 101 places, 131 transitions, 1063 flow. Second operand 8 states and 212 transitions. [2024-06-27 20:04:34,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 175 transitions, 1589 flow [2024-06-27 20:04:34,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 1543 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 20:04:34,407 INFO L231 Difference]: Finished difference. Result has 107 places, 133 transitions, 1197 flow [2024-06-27 20:04:34,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1197, PETRI_PLACES=107, PETRI_TRANSITIONS=133} [2024-06-27 20:04:34,407 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-27 20:04:34,408 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 133 transitions, 1197 flow [2024-06-27 20:04:34,408 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 20:04:34,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:34,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:34,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:04:34,408 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 20:04:34,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1152614522, now seen corresponding path program 2 times [2024-06-27 20:04:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:34,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189335417] [2024-06-27 20:04:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:34,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:35,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:35,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189335417] [2024-06-27 20:04:35,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189335417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:35,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:35,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:35,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467750397] [2024-06-27 20:04:35,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:35,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:35,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:35,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:35,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:04:35,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 133 transitions, 1197 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 20:04:35,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:35,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:04:35,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:37,102 INFO L124 PetriNetUnfolderBase]: 9844/13806 cut-off events. [2024-06-27 20:04:37,102 INFO L125 PetriNetUnfolderBase]: For 226704/226721 co-relation queries the response was YES. [2024-06-27 20:04:37,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74090 conditions, 13806 events. 9844/13806 cut-off events. For 226704/226721 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 76533 event pairs, 4188 based on Foata normal form. 20/13822 useless extension candidates. Maximal degree in co-relation 74050. Up to 13270 conditions per place. [2024-06-27 20:04:37,228 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 136 selfloop transitions, 43 changer transitions 0/186 dead transitions. [2024-06-27 20:04:37,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 1821 flow [2024-06-27 20:04:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 20:04:37,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-27 20:04:37,229 INFO L175 Difference]: Start difference. First operand has 107 places, 133 transitions, 1197 flow. Second operand 8 states and 202 transitions. [2024-06-27 20:04:37,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 1821 flow [2024-06-27 20:04:37,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 1671 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:37,360 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 1291 flow [2024-06-27 20:04:37,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1291, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2024-06-27 20:04:37,361 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-27 20:04:37,361 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 1291 flow [2024-06-27 20:04:37,361 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 20:04:37,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:37,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:37,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:04:37,361 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 20:04:37,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:37,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1152853532, now seen corresponding path program 3 times [2024-06-27 20:04:37,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:37,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813746657] [2024-06-27 20:04:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:37,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:38,250 INFO 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 20:04:38,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:38,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813746657] [2024-06-27 20:04:38,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813746657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:38,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:38,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:38,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871210281] [2024-06-27 20:04:38,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:38,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:38,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:38,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:38,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:38,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:04:38,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 1291 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 20:04:38,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:38,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:04:38,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:40,010 INFO L124 PetriNetUnfolderBase]: 9880/13842 cut-off events. [2024-06-27 20:04:40,010 INFO L125 PetriNetUnfolderBase]: For 251228/251245 co-relation queries the response was YES. [2024-06-27 20:04:40,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76981 conditions, 13842 events. 9880/13842 cut-off events. For 251228/251245 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 76576 event pairs, 3895 based on Foata normal form. 20/13858 useless extension candidates. Maximal degree in co-relation 76939. Up to 13185 conditions per place. [2024-06-27 20:04:40,118 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 135 selfloop transitions, 54 changer transitions 0/196 dead transitions. [2024-06-27 20:04:40,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 196 transitions, 2057 flow [2024-06-27 20:04:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 20:04:40,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-27 20:04:40,120 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 1291 flow. Second operand 8 states and 206 transitions. [2024-06-27 20:04:40,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 196 transitions, 2057 flow [2024-06-27 20:04:40,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 196 transitions, 1949 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 20:04:40,253 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1443 flow [2024-06-27 20:04:40,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1443, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-27 20:04:40,253 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-27 20:04:40,253 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1443 flow [2024-06-27 20:04:40,254 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 20:04:40,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:40,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:40,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:04:40,254 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 20:04:40,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:40,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1146358412, now seen corresponding path program 4 times [2024-06-27 20:04:40,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:40,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244903769] [2024-06-27 20:04:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:40,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:41,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:41,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244903769] [2024-06-27 20:04:41,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244903769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:41,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:41,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:41,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342771530] [2024-06-27 20:04:41,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:41,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:41,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:41,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:04:41,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1443 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 20:04:41,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:41,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:04:41,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:42,963 INFO L124 PetriNetUnfolderBase]: 9865/13813 cut-off events. [2024-06-27 20:04:42,963 INFO L125 PetriNetUnfolderBase]: For 277019/277036 co-relation queries the response was YES. [2024-06-27 20:04:43,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77710 conditions, 13813 events. 9865/13813 cut-off events. For 277019/277036 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 76307 event pairs, 4185 based on Foata normal form. 20/13829 useless extension candidates. Maximal degree in co-relation 77667. Up to 13301 conditions per place. [2024-06-27 20:04:43,077 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 143 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-27 20:04:43,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 192 transitions, 1953 flow [2024-06-27 20:04:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 20:04:43,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-27 20:04:43,080 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1443 flow. Second operand 8 states and 203 transitions. [2024-06-27 20:04:43,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 192 transitions, 1953 flow [2024-06-27 20:04:43,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 192 transitions, 1799 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:43,236 INFO L231 Difference]: Finished difference. Result has 119 places, 150 transitions, 1383 flow [2024-06-27 20:04:43,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1383, PETRI_PLACES=119, PETRI_TRANSITIONS=150} [2024-06-27 20:04:43,237 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-27 20:04:43,237 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 150 transitions, 1383 flow [2024-06-27 20:04:43,237 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 20:04:43,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:43,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:43,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:04:43,237 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:04:43,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:43,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2085074461, now seen corresponding path program 2 times [2024-06-27 20:04:43,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:43,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644294276] [2024-06-27 20:04:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:43,872 INFO 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 20:04:43,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:43,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644294276] [2024-06-27 20:04:43,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644294276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:43,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:43,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:04:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985122792] [2024-06-27 20:04:43,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:43,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:04:43,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:04:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:04:43,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:43,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 150 transitions, 1383 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:43,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:43,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:43,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:45,601 INFO L124 PetriNetUnfolderBase]: 9268/13150 cut-off events. [2024-06-27 20:04:45,601 INFO L125 PetriNetUnfolderBase]: For 288046/288061 co-relation queries the response was YES. [2024-06-27 20:04:45,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74609 conditions, 13150 events. 9268/13150 cut-off events. For 288046/288061 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 74629 event pairs, 4089 based on Foata normal form. 21/13135 useless extension candidates. Maximal degree in co-relation 74564. Up to 12492 conditions per place. [2024-06-27 20:04:45,690 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 116 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2024-06-27 20:04:45,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 170 transitions, 1745 flow [2024-06-27 20:04:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:04:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:04:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 20:04:45,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-27 20:04:45,691 INFO L175 Difference]: Start difference. First operand has 119 places, 150 transitions, 1383 flow. Second operand 6 states and 153 transitions. [2024-06-27 20:04:45,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 170 transitions, 1745 flow [2024-06-27 20:04:45,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 170 transitions, 1581 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 20:04:45,825 INFO L231 Difference]: Finished difference. Result has 116 places, 150 transitions, 1298 flow [2024-06-27 20:04:45,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1298, PETRI_PLACES=116, PETRI_TRANSITIONS=150} [2024-06-27 20:04:45,826 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-27 20:04:45,826 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 150 transitions, 1298 flow [2024-06-27 20:04:45,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:45,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:45,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:45,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:04:45,826 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 20:04:45,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:45,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2034632597, now seen corresponding path program 1 times [2024-06-27 20:04:45,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:45,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164284787] [2024-06-27 20:04:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:45,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:46,450 INFO 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 20:04:46,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:46,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164284787] [2024-06-27 20:04:46,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164284787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:46,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:46,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:04:46,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492010097] [2024-06-27 20:04:46,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:46,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:04:46,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:46,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:04:46,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:04:46,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:46,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 150 transitions, 1298 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:46,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:46,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:46,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:47,916 INFO L124 PetriNetUnfolderBase]: 8719/12540 cut-off events. [2024-06-27 20:04:47,916 INFO L125 PetriNetUnfolderBase]: For 265787/265789 co-relation queries the response was YES. [2024-06-27 20:04:47,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70756 conditions, 12540 events. 8719/12540 cut-off events. For 265787/265789 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 71642 event pairs, 3537 based on Foata normal form. 4/12444 useless extension candidates. Maximal degree in co-relation 70712. Up to 11874 conditions per place. [2024-06-27 20:04:48,009 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 155 selfloop transitions, 21 changer transitions 0/184 dead transitions. [2024-06-27 20:04:48,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 184 transitions, 1918 flow [2024-06-27 20:04:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:04:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:04:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 20:04:48,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-27 20:04:48,010 INFO L175 Difference]: Start difference. First operand has 116 places, 150 transitions, 1298 flow. Second operand 6 states and 159 transitions. [2024-06-27 20:04:48,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 184 transitions, 1918 flow [2024-06-27 20:04:48,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 184 transitions, 1817 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:48,187 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1364 flow [2024-06-27 20:04:48,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1364, PETRI_PLACES=117, PETRI_TRANSITIONS=158} [2024-06-27 20:04:48,188 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-06-27 20:04:48,188 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1364 flow [2024-06-27 20:04:48,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:48,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:48,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:48,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:04:48,188 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:04:48,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2047726997, now seen corresponding path program 2 times [2024-06-27 20:04:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:48,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914981310] [2024-06-27 20:04:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:48,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:48,908 INFO 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 20:04:48,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:48,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914981310] [2024-06-27 20:04:48,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914981310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:48,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:48,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:04:48,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067458546] [2024-06-27 20:04:48,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:48,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:04:48,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:04:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:04:48,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:04:48,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 158 transitions, 1364 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:48,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:48,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:04:48,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:50,518 INFO L124 PetriNetUnfolderBase]: 8705/12510 cut-off events. [2024-06-27 20:04:50,518 INFO L125 PetriNetUnfolderBase]: For 287621/287628 co-relation queries the response was YES. [2024-06-27 20:04:50,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73131 conditions, 12510 events. 8705/12510 cut-off events. For 287621/287628 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 71403 event pairs, 3514 based on Foata normal form. 8/12422 useless extension candidates. Maximal degree in co-relation 73086. Up to 11862 conditions per place. [2024-06-27 20:04:50,629 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 149 selfloop transitions, 21 changer transitions 0/178 dead transitions. [2024-06-27 20:04:50,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 178 transitions, 1764 flow [2024-06-27 20:04:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:04:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:04:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 20:04:50,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-27 20:04:50,631 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1364 flow. Second operand 6 states and 153 transitions. [2024-06-27 20:04:50,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 178 transitions, 1764 flow [2024-06-27 20:04:50,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 178 transitions, 1674 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-27 20:04:50,869 INFO L231 Difference]: Finished difference. Result has 121 places, 158 transitions, 1325 flow [2024-06-27 20:04:50,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1325, PETRI_PLACES=121, PETRI_TRANSITIONS=158} [2024-06-27 20:04:50,870 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-27 20:04:50,870 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 158 transitions, 1325 flow [2024-06-27 20:04:50,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:50,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:50,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:50,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:04:50,871 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 20:04:50,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1535776572, now seen corresponding path program 1 times [2024-06-27 20:04:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:50,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282458491] [2024-06-27 20:04:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:50,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:51,875 INFO 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 20:04:51,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:51,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282458491] [2024-06-27 20:04:51,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282458491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:51,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:51,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:51,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672320874] [2024-06-27 20:04:51,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:51,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:51,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:51,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:52,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:04:52,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 158 transitions, 1325 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 20:04:52,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:52,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:04:52,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:53,875 INFO L124 PetriNetUnfolderBase]: 10131/14232 cut-off events. [2024-06-27 20:04:53,876 INFO L125 PetriNetUnfolderBase]: For 366162/366164 co-relation queries the response was YES. [2024-06-27 20:04:53,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84986 conditions, 14232 events. 10131/14232 cut-off events. For 366162/366164 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 79072 event pairs, 4061 based on Foata normal form. 18/14245 useless extension candidates. Maximal degree in co-relation 84939. Up to 13077 conditions per place. [2024-06-27 20:04:53,995 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 143 selfloop transitions, 79 changer transitions 0/229 dead transitions. [2024-06-27 20:04:53,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 229 transitions, 2158 flow [2024-06-27 20:04:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 20:04:53,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-27 20:04:53,996 INFO L175 Difference]: Start difference. First operand has 121 places, 158 transitions, 1325 flow. Second operand 9 states and 237 transitions. [2024-06-27 20:04:53,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 229 transitions, 2158 flow [2024-06-27 20:04:54,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 229 transitions, 2099 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:54,204 INFO L231 Difference]: Finished difference. Result has 127 places, 174 transitions, 1676 flow [2024-06-27 20:04:54,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1676, PETRI_PLACES=127, PETRI_TRANSITIONS=174} [2024-06-27 20:04:54,204 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-27 20:04:54,204 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 174 transitions, 1676 flow [2024-06-27 20:04:54,205 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 20:04:54,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:54,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:54,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:04:54,205 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 20:04:54,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2031309132, now seen corresponding path program 2 times [2024-06-27 20:04:54,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:54,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975980623] [2024-06-27 20:04:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:54,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:55,178 INFO 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 20:04:55,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:55,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975980623] [2024-06-27 20:04:55,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975980623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:55,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:55,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:55,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961896303] [2024-06-27 20:04:55,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:55,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:55,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:55,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:55,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:55,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:04:55,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 174 transitions, 1676 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 20:04:55,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:55,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:04:55,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:57,267 INFO L124 PetriNetUnfolderBase]: 10373/14620 cut-off events. [2024-06-27 20:04:57,267 INFO L125 PetriNetUnfolderBase]: For 406893/406897 co-relation queries the response was YES. [2024-06-27 20:04:57,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90305 conditions, 14620 events. 10373/14620 cut-off events. For 406893/406897 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 82068 event pairs, 4115 based on Foata normal form. 18/14630 useless extension candidates. Maximal degree in co-relation 90255. Up to 13600 conditions per place. [2024-06-27 20:04:57,385 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 145 selfloop transitions, 86 changer transitions 0/238 dead transitions. [2024-06-27 20:04:57,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 238 transitions, 2481 flow [2024-06-27 20:04:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 20:04:57,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:04:57,386 INFO L175 Difference]: Start difference. First operand has 127 places, 174 transitions, 1676 flow. Second operand 9 states and 234 transitions. [2024-06-27 20:04:57,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 238 transitions, 2481 flow [2024-06-27 20:04:57,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 238 transitions, 2311 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:57,612 INFO L231 Difference]: Finished difference. Result has 134 places, 186 transitions, 1897 flow [2024-06-27 20:04:57,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1897, PETRI_PLACES=134, PETRI_TRANSITIONS=186} [2024-06-27 20:04:57,613 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-27 20:04:57,613 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 186 transitions, 1897 flow [2024-06-27 20:04:57,613 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 20:04:57,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:57,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:57,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:04:57,613 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 20:04:57,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:57,614 INFO L85 PathProgramCache]: Analyzing trace with hash -81928074, now seen corresponding path program 3 times [2024-06-27 20:04:57,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:57,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453702622] [2024-06-27 20:04:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:57,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:58,561 INFO 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 20:04:58,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:58,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453702622] [2024-06-27 20:04:58,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453702622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:58,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:58,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:58,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212399729] [2024-06-27 20:04:58,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:58,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:58,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:58,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:58,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:58,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:04:58,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 186 transitions, 1897 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 20:04:58,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:58,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:04:58,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:00,611 INFO L124 PetriNetUnfolderBase]: 10557/14922 cut-off events. [2024-06-27 20:05:00,611 INFO L125 PetriNetUnfolderBase]: For 448535/448539 co-relation queries the response was YES. [2024-06-27 20:05:00,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94408 conditions, 14922 events. 10557/14922 cut-off events. For 448535/448539 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 84315 event pairs, 3801 based on Foata normal form. 18/14932 useless extension candidates. Maximal degree in co-relation 94355. Up to 12899 conditions per place. [2024-06-27 20:05:00,722 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 134 selfloop transitions, 106 changer transitions 0/247 dead transitions. [2024-06-27 20:05:00,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 247 transitions, 2845 flow [2024-06-27 20:05:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 20:05:00,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2024-06-27 20:05:00,724 INFO L175 Difference]: Start difference. First operand has 134 places, 186 transitions, 1897 flow. Second operand 9 states and 236 transitions. [2024-06-27 20:05:00,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 247 transitions, 2845 flow [2024-06-27 20:05:01,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 247 transitions, 2696 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 20:05:01,013 INFO L231 Difference]: Finished difference. Result has 141 places, 192 transitions, 2196 flow [2024-06-27 20:05:01,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2196, PETRI_PLACES=141, PETRI_TRANSITIONS=192} [2024-06-27 20:05:01,014 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-27 20:05:01,014 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 192 transitions, 2196 flow [2024-06-27 20:05:01,014 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 20:05:01,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:01,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:01,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:05:01,015 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 20:05:01,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1177373588, now seen corresponding path program 4 times [2024-06-27 20:05:01,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:01,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566043008] [2024-06-27 20:05:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:01,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:01,996 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 20:05:01,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:01,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566043008] [2024-06-27 20:05:01,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566043008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:01,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:01,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:01,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730501821] [2024-06-27 20:05:01,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:01,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:01,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:01,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:01,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:02,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:05:02,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 192 transitions, 2196 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 20:05:02,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:02,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:05:02,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:04,306 INFO L124 PetriNetUnfolderBase]: 10518/14901 cut-off events. [2024-06-27 20:05:04,306 INFO L125 PetriNetUnfolderBase]: For 467051/467055 co-relation queries the response was YES. [2024-06-27 20:05:04,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94464 conditions, 14901 events. 10518/14901 cut-off events. For 467051/467055 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 84566 event pairs, 4142 based on Foata normal form. 18/14911 useless extension candidates. Maximal degree in co-relation 94409. Up to 13823 conditions per place. [2024-06-27 20:05:04,423 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 152 selfloop transitions, 84 changer transitions 0/243 dead transitions. [2024-06-27 20:05:04,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 243 transitions, 2804 flow [2024-06-27 20:05:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 20:05:04,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:05:04,424 INFO L175 Difference]: Start difference. First operand has 141 places, 192 transitions, 2196 flow. Second operand 9 states and 234 transitions. [2024-06-27 20:05:04,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 243 transitions, 2804 flow [2024-06-27 20:05:04,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 243 transitions, 2638 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:04,742 INFO L231 Difference]: Finished difference. Result has 144 places, 191 transitions, 2161 flow [2024-06-27 20:05:04,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2161, PETRI_PLACES=144, PETRI_TRANSITIONS=191} [2024-06-27 20:05:04,743 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-27 20:05:04,743 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 191 transitions, 2161 flow [2024-06-27 20:05:04,743 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 20:05:04,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:04,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:04,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:05:04,743 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 20:05:04,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash 206550813, now seen corresponding path program 1 times [2024-06-27 20:05:04,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:04,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762524383] [2024-06-27 20:05:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:04,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:05,514 INFO 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 20:05:05,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:05,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762524383] [2024-06-27 20:05:05,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762524383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:05,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:05,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182011268] [2024-06-27 20:05:05,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:05,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:05,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:05:05,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 191 transitions, 2161 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 20:05:05,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:05,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:05:05,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:07,348 INFO L124 PetriNetUnfolderBase]: 9400/13635 cut-off events. [2024-06-27 20:05:07,349 INFO L125 PetriNetUnfolderBase]: For 410567/410569 co-relation queries the response was YES. [2024-06-27 20:05:07,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85890 conditions, 13635 events. 9400/13635 cut-off events. For 410567/410569 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 79957 event pairs, 3568 based on Foata normal form. 4/13599 useless extension candidates. Maximal degree in co-relation 85833. Up to 12935 conditions per place. [2024-06-27 20:05:07,482 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 198 selfloop transitions, 18 changer transitions 0/224 dead transitions. [2024-06-27 20:05:07,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 224 transitions, 2755 flow [2024-06-27 20:05:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 20:05:07,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-27 20:05:07,483 INFO L175 Difference]: Start difference. First operand has 144 places, 191 transitions, 2161 flow. Second operand 7 states and 177 transitions. [2024-06-27 20:05:07,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 224 transitions, 2755 flow [2024-06-27 20:05:07,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 224 transitions, 2477 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 20:05:07,844 INFO L231 Difference]: Finished difference. Result has 143 places, 195 transitions, 2008 flow [2024-06-27 20:05:07,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2008, PETRI_PLACES=143, PETRI_TRANSITIONS=195} [2024-06-27 20:05:07,845 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-06-27 20:05:07,845 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 195 transitions, 2008 flow [2024-06-27 20:05:07,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 20:05:07,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:07,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:07,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:05:07,846 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 20:05:07,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:07,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1350897743, now seen corresponding path program 2 times [2024-06-27 20:05:07,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:07,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84773663] [2024-06-27 20:05:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:07,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:08,598 INFO 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 20:05:08,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:08,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84773663] [2024-06-27 20:05:08,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84773663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:08,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:08,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:08,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733957106] [2024-06-27 20:05:08,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:08,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:08,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:08,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:05:08,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 195 transitions, 2008 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 20:05:08,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:08,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:05:08,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:10,452 INFO L124 PetriNetUnfolderBase]: 9432/13685 cut-off events. [2024-06-27 20:05:10,453 INFO L125 PetriNetUnfolderBase]: For 431648/431650 co-relation queries the response was YES. [2024-06-27 20:05:10,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87733 conditions, 13685 events. 9432/13685 cut-off events. For 431648/431650 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 80127 event pairs, 3546 based on Foata normal form. 4/13644 useless extension candidates. Maximal degree in co-relation 87677. Up to 12866 conditions per place. [2024-06-27 20:05:10,584 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 191 selfloop transitions, 35 changer transitions 0/234 dead transitions. [2024-06-27 20:05:10,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 234 transitions, 2822 flow [2024-06-27 20:05:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 20:05:10,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-27 20:05:10,585 INFO L175 Difference]: Start difference. First operand has 143 places, 195 transitions, 2008 flow. Second operand 7 states and 183 transitions. [2024-06-27 20:05:10,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 234 transitions, 2822 flow [2024-06-27 20:05:10,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 234 transitions, 2727 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:10,935 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2160 flow [2024-06-27 20:05:10,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2160, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-27 20:05:10,940 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-27 20:05:10,940 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2160 flow [2024-06-27 20:05:10,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 20:05:10,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:10,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:10,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:05:10,941 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:10,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:10,942 INFO L85 PathProgramCache]: Analyzing trace with hash -944971343, now seen corresponding path program 3 times [2024-06-27 20:05:10,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:10,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712406478] [2024-06-27 20:05:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:10,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:11,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:11,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712406478] [2024-06-27 20:05:11,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712406478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:11,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:11,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:11,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570576538] [2024-06-27 20:05:11,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:11,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:11,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:11,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:05:11,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2160 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 20:05:11,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:11,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:05:11,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:13,561 INFO L124 PetriNetUnfolderBase]: 9418/13670 cut-off events. [2024-06-27 20:05:13,561 INFO L125 PetriNetUnfolderBase]: For 462262/462264 co-relation queries the response was YES. [2024-06-27 20:05:13,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90158 conditions, 13670 events. 9418/13670 cut-off events. For 462262/462264 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 80122 event pairs, 3513 based on Foata normal form. 4/13634 useless extension candidates. Maximal degree in co-relation 90101. Up to 12854 conditions per place. [2024-06-27 20:05:13,697 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 185 selfloop transitions, 35 changer transitions 0/228 dead transitions. [2024-06-27 20:05:13,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 228 transitions, 2674 flow [2024-06-27 20:05:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 20:05:13,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-27 20:05:13,698 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2160 flow. Second operand 7 states and 177 transitions. [2024-06-27 20:05:13,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 228 transitions, 2674 flow [2024-06-27 20:05:14,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 228 transitions, 2534 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-27 20:05:14,131 INFO L231 Difference]: Finished difference. Result has 149 places, 203 transitions, 2099 flow [2024-06-27 20:05:14,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2099, PETRI_PLACES=149, PETRI_TRANSITIONS=203} [2024-06-27 20:05:14,131 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-06-27 20:05:14,131 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 203 transitions, 2099 flow [2024-06-27 20:05:14,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 20:05:14,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:14,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:14,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:05:14,132 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:14,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:14,132 INFO L85 PathProgramCache]: Analyzing trace with hash 213230817, now seen corresponding path program 1 times [2024-06-27 20:05:14,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:14,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741213859] [2024-06-27 20:05:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:14,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:15,318 INFO 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 20:05:15,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:15,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741213859] [2024-06-27 20:05:15,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741213859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:15,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:15,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:15,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939102036] [2024-06-27 20:05:15,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:15,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:15,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:15,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:15,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:15,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-27 20:05:15,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 203 transitions, 2099 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:15,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:15,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-27 20:05:15,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:17,107 INFO L124 PetriNetUnfolderBase]: 8882/13056 cut-off events. [2024-06-27 20:05:17,107 INFO L125 PetriNetUnfolderBase]: For 483807/483824 co-relation queries the response was YES. [2024-06-27 20:05:17,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87493 conditions, 13056 events. 8882/13056 cut-off events. For 483807/483824 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 78392 event pairs, 3472 based on Foata normal form. 19/12973 useless extension candidates. Maximal degree in co-relation 87434. Up to 12151 conditions per place. [2024-06-27 20:05:17,225 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 196 selfloop transitions, 17 changer transitions 0/233 dead transitions. [2024-06-27 20:05:17,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 233 transitions, 2700 flow [2024-06-27 20:05:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 20:05:17,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-27 20:05:17,226 INFO L175 Difference]: Start difference. First operand has 149 places, 203 transitions, 2099 flow. Second operand 7 states and 176 transitions. [2024-06-27 20:05:17,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 233 transitions, 2700 flow [2024-06-27 20:05:17,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 233 transitions, 2588 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:17,567 INFO L231 Difference]: Finished difference. Result has 151 places, 210 transitions, 2147 flow [2024-06-27 20:05:17,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2147, PETRI_PLACES=151, PETRI_TRANSITIONS=210} [2024-06-27 20:05:17,568 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-27 20:05:17,568 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 210 transitions, 2147 flow [2024-06-27 20:05:17,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:17,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:17,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:17,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:05:17,568 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:17,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:17,569 INFO L85 PathProgramCache]: Analyzing trace with hash -576283475, now seen corresponding path program 1 times [2024-06-27 20:05:17,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:17,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141729453] [2024-06-27 20:05:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:17,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:18,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:18,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141729453] [2024-06-27 20:05:18,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141729453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:18,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:18,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:05:18,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240874920] [2024-06-27 20:05:18,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:18,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:05:18,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:18,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:05:18,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:05:18,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-27 20:05:18,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 210 transitions, 2147 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:18,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:18,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-27 20:05:18,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:19,826 INFO L124 PetriNetUnfolderBase]: 8467/12624 cut-off events. [2024-06-27 20:05:19,826 INFO L125 PetriNetUnfolderBase]: For 515872/515949 co-relation queries the response was YES. [2024-06-27 20:05:19,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88927 conditions, 12624 events. 8467/12624 cut-off events. For 515872/515949 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 78116 event pairs, 3263 based on Foata normal form. 16/12427 useless extension candidates. Maximal degree in co-relation 88866. Up to 11541 conditions per place. [2024-06-27 20:05:19,936 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 187 selfloop transitions, 10 changer transitions 0/225 dead transitions. [2024-06-27 20:05:19,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 225 transitions, 2645 flow [2024-06-27 20:05:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:05:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:05:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 20:05:19,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:05:19,937 INFO L175 Difference]: Start difference. First operand has 151 places, 210 transitions, 2147 flow. Second operand 5 states and 130 transitions. [2024-06-27 20:05:19,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 225 transitions, 2645 flow [2024-06-27 20:05:20,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 225 transitions, 2549 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:05:20,248 INFO L231 Difference]: Finished difference. Result has 152 places, 214 transitions, 2156 flow [2024-06-27 20:05:20,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2051, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2156, PETRI_PLACES=152, PETRI_TRANSITIONS=214} [2024-06-27 20:05:20,248 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-27 20:05:20,248 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 214 transitions, 2156 flow [2024-06-27 20:05:20,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:20,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:20,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:20,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:05:20,249 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:20,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:20,249 INFO L85 PathProgramCache]: Analyzing trace with hash -96100356, now seen corresponding path program 1 times [2024-06-27 20:05:20,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:20,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289901730] [2024-06-27 20:05:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:20,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:20,995 INFO 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 20:05:20,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:20,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289901730] [2024-06-27 20:05:20,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289901730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:20,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:20,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:20,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478662559] [2024-06-27 20:05:20,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:20,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:20,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:21,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:05:21,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 214 transitions, 2156 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:21,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:21,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:05:21,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:23,291 INFO L124 PetriNetUnfolderBase]: 10630/15062 cut-off events. [2024-06-27 20:05:23,291 INFO L125 PetriNetUnfolderBase]: For 641280/641295 co-relation queries the response was YES. [2024-06-27 20:05:23,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106855 conditions, 15062 events. 10630/15062 cut-off events. For 641280/641295 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 85633 event pairs, 4061 based on Foata normal form. 16/15074 useless extension candidates. Maximal degree in co-relation 106793. Up to 14325 conditions per place. [2024-06-27 20:05:23,416 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 215 selfloop transitions, 51 changer transitions 0/273 dead transitions. [2024-06-27 20:05:23,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 273 transitions, 3342 flow [2024-06-27 20:05:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 20:05:23,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-27 20:05:23,417 INFO L175 Difference]: Start difference. First operand has 152 places, 214 transitions, 2156 flow. Second operand 7 states and 186 transitions. [2024-06-27 20:05:23,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 273 transitions, 3342 flow [2024-06-27 20:05:23,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 273 transitions, 3265 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 20:05:23,810 INFO L231 Difference]: Finished difference. Result has 157 places, 232 transitions, 2501 flow [2024-06-27 20:05:23,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2501, PETRI_PLACES=157, PETRI_TRANSITIONS=232} [2024-06-27 20:05:23,811 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 102 predicate places. [2024-06-27 20:05:23,811 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 232 transitions, 2501 flow [2024-06-27 20:05:23,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:23,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:23,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:23,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:05:23,811 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:23,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash 825361472, now seen corresponding path program 2 times [2024-06-27 20:05:23,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:23,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558006050] [2024-06-27 20:05:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:23,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:24,568 INFO 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 20:05:24,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:24,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558006050] [2024-06-27 20:05:24,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558006050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:24,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:24,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:24,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958910826] [2024-06-27 20:05:24,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:24,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:24,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:24,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:24,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:05:24,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 232 transitions, 2501 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:24,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:24,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:05:24,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:27,078 INFO L124 PetriNetUnfolderBase]: 10708/15167 cut-off events. [2024-06-27 20:05:27,079 INFO L125 PetriNetUnfolderBase]: For 685749/685764 co-relation queries the response was YES. [2024-06-27 20:05:27,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111209 conditions, 15167 events. 10708/15167 cut-off events. For 685749/685764 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86171 event pairs, 4042 based on Foata normal form. 16/15179 useless extension candidates. Maximal degree in co-relation 111145. Up to 14395 conditions per place. [2024-06-27 20:05:27,207 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 212 selfloop transitions, 59 changer transitions 0/278 dead transitions. [2024-06-27 20:05:27,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 278 transitions, 3601 flow [2024-06-27 20:05:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 20:05:27,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-27 20:05:27,208 INFO L175 Difference]: Start difference. First operand has 157 places, 232 transitions, 2501 flow. Second operand 7 states and 183 transitions. [2024-06-27 20:05:27,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 278 transitions, 3601 flow [2024-06-27 20:05:27,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 278 transitions, 3460 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-27 20:05:27,529 INFO L231 Difference]: Finished difference. Result has 162 places, 240 transitions, 2659 flow [2024-06-27 20:05:27,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=162, PETRI_TRANSITIONS=240} [2024-06-27 20:05:27,530 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-27 20:05:27,530 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 240 transitions, 2659 flow [2024-06-27 20:05:27,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:27,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:27,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:27,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:05:27,530 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:27,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:27,530 INFO L85 PathProgramCache]: Analyzing trace with hash -540443170, now seen corresponding path program 3 times [2024-06-27 20:05:27,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:27,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193082813] [2024-06-27 20:05:27,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:27,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:28,298 INFO 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 20:05:28,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:28,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193082813] [2024-06-27 20:05:28,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193082813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:28,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:28,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:28,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040387224] [2024-06-27 20:05:28,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:28,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:28,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:28,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:28,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:28,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:05:28,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 240 transitions, 2659 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:28,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:28,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:05:28,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:30,750 INFO L124 PetriNetUnfolderBase]: 10694/15145 cut-off events. [2024-06-27 20:05:30,750 INFO L125 PetriNetUnfolderBase]: For 713593/713612 co-relation queries the response was YES. [2024-06-27 20:05:30,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111953 conditions, 15145 events. 10694/15145 cut-off events. For 713593/713612 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 85994 event pairs, 4031 based on Foata normal form. 18/15158 useless extension candidates. Maximal degree in co-relation 111887. Up to 14383 conditions per place. [2024-06-27 20:05:30,899 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 213 selfloop transitions, 61 changer transitions 0/281 dead transitions. [2024-06-27 20:05:30,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 281 transitions, 3635 flow [2024-06-27 20:05:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 20:05:30,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-27 20:05:30,900 INFO L175 Difference]: Start difference. First operand has 162 places, 240 transitions, 2659 flow. Second operand 7 states and 183 transitions. [2024-06-27 20:05:30,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 281 transitions, 3635 flow [2024-06-27 20:05:31,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 281 transitions, 3447 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-27 20:05:31,475 INFO L231 Difference]: Finished difference. Result has 166 places, 242 transitions, 2632 flow [2024-06-27 20:05:31,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2632, PETRI_PLACES=166, PETRI_TRANSITIONS=242} [2024-06-27 20:05:31,476 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-06-27 20:05:31,476 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 242 transitions, 2632 flow [2024-06-27 20:05:31,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:31,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:31,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:31,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:05:31,476 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:31,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2108245342, now seen corresponding path program 4 times [2024-06-27 20:05:31,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:31,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538724132] [2024-06-27 20:05:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:31,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:32,223 INFO 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 20:05:32,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:32,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538724132] [2024-06-27 20:05:32,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538724132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:32,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:32,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:32,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448341544] [2024-06-27 20:05:32,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:32,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:32,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:32,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:32,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:05:32,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 242 transitions, 2632 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:32,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:32,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:05:32,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:34,603 INFO L124 PetriNetUnfolderBase]: 10726/15187 cut-off events. [2024-06-27 20:05:34,603 INFO L125 PetriNetUnfolderBase]: For 744555/744574 co-relation queries the response was YES. [2024-06-27 20:05:34,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113006 conditions, 15187 events. 10726/15187 cut-off events. For 744555/744574 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86204 event pairs, 4038 based on Foata normal form. 18/15200 useless extension candidates. Maximal degree in co-relation 112939. Up to 14412 conditions per place. [2024-06-27 20:05:34,749 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 208 selfloop transitions, 65 changer transitions 0/280 dead transitions. [2024-06-27 20:05:34,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 280 transitions, 3522 flow [2024-06-27 20:05:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 20:05:34,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-27 20:05:34,750 INFO L175 Difference]: Start difference. First operand has 166 places, 242 transitions, 2632 flow. Second operand 7 states and 178 transitions. [2024-06-27 20:05:34,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 280 transitions, 3522 flow [2024-06-27 20:05:35,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 280 transitions, 3408 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 20:05:35,589 INFO L231 Difference]: Finished difference. Result has 170 places, 246 transitions, 2747 flow [2024-06-27 20:05:35,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2747, PETRI_PLACES=170, PETRI_TRANSITIONS=246} [2024-06-27 20:05:35,589 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-27 20:05:35,589 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 246 transitions, 2747 flow [2024-06-27 20:05:35,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:35,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:35,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:35,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:05:35,590 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:35,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:35,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1444851802, now seen corresponding path program 5 times [2024-06-27 20:05:35,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:35,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453063244] [2024-06-27 20:05:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:35,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:36,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:36,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453063244] [2024-06-27 20:05:36,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453063244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:36,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:36,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:36,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762507694] [2024-06-27 20:05:36,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:36,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:36,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:36,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:05:36,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 246 transitions, 2747 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:36,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:36,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:05:36,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:38,614 INFO L124 PetriNetUnfolderBase]: 10712/15174 cut-off events. [2024-06-27 20:05:38,614 INFO L125 PetriNetUnfolderBase]: For 775801/775841 co-relation queries the response was YES. [2024-06-27 20:05:38,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113657 conditions, 15174 events. 10712/15174 cut-off events. For 775801/775841 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86199 event pairs, 4033 based on Foata normal form. 32/15199 useless extension candidates. Maximal degree in co-relation 113588. Up to 14400 conditions per place. [2024-06-27 20:05:38,774 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 204 selfloop transitions, 65 changer transitions 0/276 dead transitions. [2024-06-27 20:05:38,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 276 transitions, 3529 flow [2024-06-27 20:05:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 20:05:38,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-27 20:05:38,775 INFO L175 Difference]: Start difference. First operand has 170 places, 246 transitions, 2747 flow. Second operand 7 states and 174 transitions. [2024-06-27 20:05:38,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 276 transitions, 3529 flow [2024-06-27 20:05:39,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 276 transitions, 3345 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 20:05:39,406 INFO L231 Difference]: Finished difference. Result has 173 places, 246 transitions, 2702 flow [2024-06-27 20:05:39,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2702, PETRI_PLACES=173, PETRI_TRANSITIONS=246} [2024-06-27 20:05:39,406 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-06-27 20:05:39,406 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 246 transitions, 2702 flow [2024-06-27 20:05:39,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:39,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:39,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:39,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:05:39,407 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:39,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:39,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1987420164, now seen corresponding path program 6 times [2024-06-27 20:05:39,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:39,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205417209] [2024-06-27 20:05:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:39,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:40,272 INFO 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 20:05:40,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:40,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205417209] [2024-06-27 20:05:40,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205417209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:40,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:40,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:40,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69424031] [2024-06-27 20:05:40,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:40,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:40,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:40,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:40,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:05:40,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 246 transitions, 2702 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:40,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:40,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:05:40,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:42,596 INFO L124 PetriNetUnfolderBase]: 10698/15156 cut-off events. [2024-06-27 20:05:42,597 INFO L125 PetriNetUnfolderBase]: For 804673/804713 co-relation queries the response was YES. [2024-06-27 20:05:42,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114155 conditions, 15156 events. 10698/15156 cut-off events. For 804673/804713 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86043 event pairs, 4033 based on Foata normal form. 32/15181 useless extension candidates. Maximal degree in co-relation 114085. Up to 14388 conditions per place. [2024-06-27 20:05:42,753 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 202 selfloop transitions, 65 changer transitions 0/274 dead transitions. [2024-06-27 20:05:42,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 3334 flow [2024-06-27 20:05:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 20:05:42,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-27 20:05:42,754 INFO L175 Difference]: Start difference. First operand has 173 places, 246 transitions, 2702 flow. Second operand 7 states and 172 transitions. [2024-06-27 20:05:42,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 3334 flow [2024-06-27 20:05:43,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 274 transitions, 3102 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:43,358 INFO L231 Difference]: Finished difference. Result has 174 places, 246 transitions, 2609 flow [2024-06-27 20:05:43,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2609, PETRI_PLACES=174, PETRI_TRANSITIONS=246} [2024-06-27 20:05:43,358 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 119 predicate places. [2024-06-27 20:05:43,358 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 246 transitions, 2609 flow [2024-06-27 20:05:43,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 20:05:43,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:43,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:43,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:05:43,359 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:43,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash -709046789, now seen corresponding path program 1 times [2024-06-27 20:05:43,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:43,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342090189] [2024-06-27 20:05:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:43,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:44,399 INFO 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 20:05:44,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:44,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342090189] [2024-06-27 20:05:44,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342090189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:44,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:44,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:05:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257440443] [2024-06-27 20:05:44,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:44,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:05:44,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:05:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:05:44,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-27 20:05:44,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 246 transitions, 2609 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 20:05:44,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:44,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-27 20:05:44,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:46,278 INFO L124 PetriNetUnfolderBase]: 8555/12784 cut-off events. [2024-06-27 20:05:46,278 INFO L125 PetriNetUnfolderBase]: For 695239/695408 co-relation queries the response was YES. [2024-06-27 20:05:46,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97331 conditions, 12784 events. 8555/12784 cut-off events. For 695239/695408 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 79200 event pairs, 3226 based on Foata normal form. 17/12587 useless extension candidates. Maximal degree in co-relation 97260. Up to 11548 conditions per place. [2024-06-27 20:05:46,436 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 207 selfloop transitions, 14 changer transitions 0/263 dead transitions. [2024-06-27 20:05:46,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 263 transitions, 3165 flow [2024-06-27 20:05:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:05:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:05:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 20:05:46,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-27 20:05:46,437 INFO L175 Difference]: Start difference. First operand has 174 places, 246 transitions, 2609 flow. Second operand 6 states and 152 transitions. [2024-06-27 20:05:46,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 263 transitions, 3165 flow [2024-06-27 20:05:47,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 263 transitions, 3039 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:47,033 INFO L231 Difference]: Finished difference. Result has 175 places, 250 transitions, 2602 flow [2024-06-27 20:05:47,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2602, PETRI_PLACES=175, PETRI_TRANSITIONS=250} [2024-06-27 20:05:47,034 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2024-06-27 20:05:47,034 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 250 transitions, 2602 flow [2024-06-27 20:05:47,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 20:05:47,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:47,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:47,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:05:47,034 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:47,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:47,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1902443274, now seen corresponding path program 1 times [2024-06-27 20:05:47,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:47,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747153511] [2024-06-27 20:05:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:47,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:47,993 INFO 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 20:05:47,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:47,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747153511] [2024-06-27 20:05:47,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747153511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:47,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:47,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:47,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94790649] [2024-06-27 20:05:47,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:47,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:47,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:47,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:47,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:48,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:05:48,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 250 transitions, 2602 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:05:48,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:48,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:05:48,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:50,209 INFO L124 PetriNetUnfolderBase]: 10764/15228 cut-off events. [2024-06-27 20:05:50,209 INFO L125 PetriNetUnfolderBase]: For 858834/858844 co-relation queries the response was YES. [2024-06-27 20:05:50,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117796 conditions, 15228 events. 10764/15228 cut-off events. For 858834/858844 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 86442 event pairs, 3999 based on Foata normal form. 12/15237 useless extension candidates. Maximal degree in co-relation 117724. Up to 14490 conditions per place. [2024-06-27 20:05:50,669 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 242 selfloop transitions, 58 changer transitions 0/307 dead transitions. [2024-06-27 20:05:50,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 307 transitions, 3686 flow [2024-06-27 20:05:50,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 20:05:50,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072115384615384 [2024-06-27 20:05:50,670 INFO L175 Difference]: Start difference. First operand has 175 places, 250 transitions, 2602 flow. Second operand 8 states and 211 transitions. [2024-06-27 20:05:50,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 307 transitions, 3686 flow [2024-06-27 20:05:51,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 307 transitions, 3595 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:05:51,476 INFO L231 Difference]: Finished difference. Result has 180 places, 259 transitions, 2835 flow [2024-06-27 20:05:51,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2835, PETRI_PLACES=180, PETRI_TRANSITIONS=259} [2024-06-27 20:05:51,476 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-27 20:05:51,476 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 259 transitions, 2835 flow [2024-06-27 20:05:51,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:05:51,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:51,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:51,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:05:51,477 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:51,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1205981484, now seen corresponding path program 2 times [2024-06-27 20:05:51,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:51,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896005136] [2024-06-27 20:05:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:51,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:52,397 INFO 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 20:05:52,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:52,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896005136] [2024-06-27 20:05:52,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896005136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:52,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:52,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:52,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766194755] [2024-06-27 20:05:52,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:52,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:52,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:52,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:52,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:52,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:05:52,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 259 transitions, 2835 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:05:52,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:52,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:05:52,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:55,069 INFO L124 PetriNetUnfolderBase]: 10828/15322 cut-off events. [2024-06-27 20:05:55,069 INFO L125 PetriNetUnfolderBase]: For 907387/907397 co-relation queries the response was YES. [2024-06-27 20:05:55,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121700 conditions, 15322 events. 10828/15322 cut-off events. For 907387/907397 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 87070 event pairs, 3999 based on Foata normal form. 12/15331 useless extension candidates. Maximal degree in co-relation 121626. Up to 14538 conditions per place. [2024-06-27 20:05:55,241 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 249 selfloop transitions, 69 changer transitions 0/325 dead transitions. [2024-06-27 20:05:55,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 325 transitions, 3948 flow [2024-06-27 20:05:55,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:05:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:05:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 20:05:55,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-27 20:05:55,242 INFO L175 Difference]: Start difference. First operand has 180 places, 259 transitions, 2835 flow. Second operand 10 states and 255 transitions. [2024-06-27 20:05:55,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 325 transitions, 3948 flow [2024-06-27 20:05:56,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 325 transitions, 3697 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:56,252 INFO L231 Difference]: Finished difference. Result has 185 places, 267 transitions, 2860 flow [2024-06-27 20:05:56,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2860, PETRI_PLACES=185, PETRI_TRANSITIONS=267} [2024-06-27 20:05:56,253 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-27 20:05:56,253 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 267 transitions, 2860 flow [2024-06-27 20:05:56,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:05:56,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:56,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:56,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:05:56,254 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:05:56,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:56,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1197407628, now seen corresponding path program 1 times [2024-06-27 20:05:56,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:56,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874748589] [2024-06-27 20:05:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:56,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:57,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:57,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874748589] [2024-06-27 20:05:57,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874748589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:57,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:57,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:57,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683827036] [2024-06-27 20:05:57,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:57,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:57,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:57,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:05:57,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 267 transitions, 2860 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:05:57,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:57,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:05:57,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:59,938 INFO L124 PetriNetUnfolderBase]: 11029/15593 cut-off events. [2024-06-27 20:05:59,938 INFO L125 PetriNetUnfolderBase]: For 973331/973341 co-relation queries the response was YES. [2024-06-27 20:06:00,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125136 conditions, 15593 events. 11029/15593 cut-off events. For 973331/973341 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 88423 event pairs, 3406 based on Foata normal form. 24/15614 useless extension candidates. Maximal degree in co-relation 125062. Up to 14596 conditions per place. [2024-06-27 20:06:00,096 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 265 selfloop transitions, 54 changer transitions 0/326 dead transitions. [2024-06-27 20:06:00,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 326 transitions, 4010 flow [2024-06-27 20:06:00,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 20:06:00,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-27 20:06:00,097 INFO L175 Difference]: Start difference. First operand has 185 places, 267 transitions, 2860 flow. Second operand 8 states and 214 transitions. [2024-06-27 20:06:00,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 326 transitions, 4010 flow [2024-06-27 20:06:00,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 326 transitions, 3830 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:00,774 INFO L231 Difference]: Finished difference. Result has 186 places, 271 transitions, 2939 flow [2024-06-27 20:06:00,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2680, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2939, PETRI_PLACES=186, PETRI_TRANSITIONS=271} [2024-06-27 20:06:00,774 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-27 20:06:00,775 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 271 transitions, 2939 flow [2024-06-27 20:06:00,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:06:00,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:00,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:00,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:06:00,775 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:06:00,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:00,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1028955602, now seen corresponding path program 2 times [2024-06-27 20:06:00,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:00,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369479797] [2024-06-27 20:06:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:00,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:01,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:01,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369479797] [2024-06-27 20:06:01,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369479797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:01,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:01,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016462867] [2024-06-27 20:06:01,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:01,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:01,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:01,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:01,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:01,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:06:01,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 271 transitions, 2939 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:06:01,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:01,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:06:01,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:04,634 INFO L124 PetriNetUnfolderBase]: 11154/15788 cut-off events. [2024-06-27 20:06:04,634 INFO L125 PetriNetUnfolderBase]: For 1027575/1027585 co-relation queries the response was YES. [2024-06-27 20:06:04,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128286 conditions, 15788 events. 11154/15788 cut-off events. For 1027575/1027585 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 89907 event pairs, 4042 based on Foata normal form. 28/15813 useless extension candidates. Maximal degree in co-relation 128211. Up to 14999 conditions per place. [2024-06-27 20:06:04,796 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 261 selfloop transitions, 52 changer transitions 0/320 dead transitions. [2024-06-27 20:06:04,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 320 transitions, 3817 flow [2024-06-27 20:06:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 20:06:04,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-27 20:06:04,798 INFO L175 Difference]: Start difference. First operand has 186 places, 271 transitions, 2939 flow. Second operand 8 states and 207 transitions. [2024-06-27 20:06:04,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 320 transitions, 3817 flow [2024-06-27 20:06:05,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 320 transitions, 3702 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:06:05,453 INFO L231 Difference]: Finished difference. Result has 190 places, 273 transitions, 3014 flow [2024-06-27 20:06:05,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3014, PETRI_PLACES=190, PETRI_TRANSITIONS=273} [2024-06-27 20:06:05,454 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-06-27 20:06:05,454 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 273 transitions, 3014 flow [2024-06-27 20:06:05,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:06:05,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:05,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:05,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:06:05,454 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:06:05,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:05,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1721553992, now seen corresponding path program 1 times [2024-06-27 20:06:05,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:05,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987423849] [2024-06-27 20:06:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:05,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:06,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:06,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987423849] [2024-06-27 20:06:06,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987423849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:06,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:06,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:06,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669303284] [2024-06-27 20:06:06,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:06,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:06,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:06,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:06,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:06,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:06:06,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 273 transitions, 3014 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:06:06,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:06,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:06:06,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:09,260 INFO L124 PetriNetUnfolderBase]: 11186/15849 cut-off events. [2024-06-27 20:06:09,260 INFO L125 PetriNetUnfolderBase]: For 1053156/1053164 co-relation queries the response was YES. [2024-06-27 20:06:09,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129395 conditions, 15849 events. 11186/15849 cut-off events. For 1053156/1053164 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 90482 event pairs, 4115 based on Foata normal form. 12/15856 useless extension candidates. Maximal degree in co-relation 129318. Up to 15214 conditions per place. [2024-06-27 20:06:09,444 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 268 selfloop transitions, 43 changer transitions 0/318 dead transitions. [2024-06-27 20:06:09,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 318 transitions, 3870 flow [2024-06-27 20:06:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 20:06:09,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-27 20:06:09,445 INFO L175 Difference]: Start difference. First operand has 190 places, 273 transitions, 3014 flow. Second operand 8 states and 202 transitions. [2024-06-27 20:06:09,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 318 transitions, 3870 flow [2024-06-27 20:06:10,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 318 transitions, 3736 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:10,442 INFO L231 Difference]: Finished difference. Result has 192 places, 277 transitions, 3079 flow [2024-06-27 20:06:10,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2880, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3079, PETRI_PLACES=192, PETRI_TRANSITIONS=277} [2024-06-27 20:06:10,442 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 137 predicate places. [2024-06-27 20:06:10,443 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 277 transitions, 3079 flow [2024-06-27 20:06:10,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:06:10,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:10,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:10,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:06:10,443 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:06:10,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1315558734, now seen corresponding path program 3 times [2024-06-27 20:06:10,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:10,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007021881] [2024-06-27 20:06:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:10,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:11,435 INFO 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 20:06:11,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007021881] [2024-06-27 20:06:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007021881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:11,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:11,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500176375] [2024-06-27 20:06:11,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:11,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:11,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:06:11,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 277 transitions, 3079 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:06:11,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:11,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:06:11,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:14,303 INFO L124 PetriNetUnfolderBase]: 11264/15964 cut-off events. [2024-06-27 20:06:14,304 INFO L125 PetriNetUnfolderBase]: For 1104400/1104409 co-relation queries the response was YES. [2024-06-27 20:06:14,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132857 conditions, 15964 events. 11264/15964 cut-off events. For 1104400/1104409 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 91222 event pairs, 4011 based on Foata normal form. 8/15968 useless extension candidates. Maximal degree in co-relation 132779. Up to 14767 conditions per place. [2024-06-27 20:06:14,466 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 217 selfloop transitions, 113 changer transitions 0/337 dead transitions. [2024-06-27 20:06:14,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 337 transitions, 4691 flow [2024-06-27 20:06:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-27 20:06:14,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-27 20:06:14,468 INFO L175 Difference]: Start difference. First operand has 192 places, 277 transitions, 3079 flow. Second operand 8 states and 216 transitions. [2024-06-27 20:06:14,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 337 transitions, 4691 flow [2024-06-27 20:06:15,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 337 transitions, 4522 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:15,182 INFO L231 Difference]: Finished difference. Result has 194 places, 289 transitions, 3441 flow [2024-06-27 20:06:15,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3441, PETRI_PLACES=194, PETRI_TRANSITIONS=289} [2024-06-27 20:06:15,183 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-06-27 20:06:15,183 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 289 transitions, 3441 flow [2024-06-27 20:06:15,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:06:15,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:15,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:15,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:06:15,184 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:06:15,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1786853388, now seen corresponding path program 2 times [2024-06-27 20:06:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:15,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066633405] [2024-06-27 20:06:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:15,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:16,243 INFO 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 20:06:16,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:16,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066633405] [2024-06-27 20:06:16,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066633405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:16,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:16,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:16,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611276519] [2024-06-27 20:06:16,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:16,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:16,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:06:16,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 289 transitions, 3441 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 20:06:16,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:16,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:06:16,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand