./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_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.2024-05-21_14-57-05.files/mutex-meet/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_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-bcb38a6-m [2024-06-04 16:01:10,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:01:10,531 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:01:10,541 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:01:10,542 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:01:10,576 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:01:10,578 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:01:10,578 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:01:10,579 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:01:10,582 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:01:10,583 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:01:10,583 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:01:10,584 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:01:10,585 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:01:10,585 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:01:10,586 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:01:10,586 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:01:10,586 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:01:10,586 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:01:10,587 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:01:10,587 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:01:10,587 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:01:10,588 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:01:10,588 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:01:10,588 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:01:10,589 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:01:10,589 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:01:10,589 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:01:10,590 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:01:10,590 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:01:10,591 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:01:10,591 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:01:10,591 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:01:10,591 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:01:10,592 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:01:10,592 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:01:10,592 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:01:10,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:01:10,593 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:01:10,593 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:01:10,593 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:01:10,593 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:01:10,594 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:01:10,594 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:01:10,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:01:10,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:01:10,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:01:10,880 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:01:10,881 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:01:10,882 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 16:01:11,093 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:01:11,093 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:01:11,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:01:12,246 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:01:12,508 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:01:12,509 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:01:12,531 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b26e84df/bf61b7e206774bfc848ee93232e05f25/FLAG39b033a00 [2024-06-04 16:01:12,550 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b26e84df/bf61b7e206774bfc848ee93232e05f25 [2024-06-04 16:01:12,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:01:12,553 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:01:12,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:01:12,556 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:01:12,560 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:01:12,561 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:11" (1/2) ... [2024-06-04 16:01:12,562 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cbeb76f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:12, skipping insertion in model container [2024-06-04 16:01:12,562 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:11" (1/2) ... [2024-06-04 16:01:12,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@465c868 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:12, skipping insertion in model container [2024-06-04 16:01:12,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:01:12" (2/2) ... [2024-06-04 16:01:12,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cbeb76f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:12, skipping insertion in model container [2024-06-04 16:01:12,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:01:12" (2/2) ... [2024-06-04 16:01:12,566 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:01:12,646 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:01:12,647 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:01:12,648 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:01:12,648 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:01:12,648 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:01:12,649 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-04 16:01:12,688 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:01:12,978 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:01:12,996 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:01:13,175 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:01:13,212 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:01:13,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13 WrapperNode [2024-06-04 16:01:13,212 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:01:13,213 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:01:13,213 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:01:13,214 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:01:13,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,233 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,266 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-04 16:01:13,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:01:13,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:01:13,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:01:13,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:01:13,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,281 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,296 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 16:01:13,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,303 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,308 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:01:13,312 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:01:13,312 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:01:13,312 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:01:13,313 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (1/1) ... [2024-06-04 16:01:13,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:01:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:01:13,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 16:01:13,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 16:01:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:01:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:01:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:01:13,381 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:01:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:01:13,381 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:01:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:01:13,382 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:01:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:01:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:01:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:01:13,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:01:13,384 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:01:13,495 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:01:13,497 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:01:13,925 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:01:13,926 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:01:14,029 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:01:14,029 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:01:14,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:01:14 BoogieIcfgContainer [2024-06-04 16:01:14,030 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:01:14,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:01:14,032 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:01:14,035 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:01:14,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:11" (1/4) ... [2024-06-04 16:01:14,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7849d92 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:01:14, skipping insertion in model container [2024-06-04 16:01:14,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:01:12" (2/4) ... [2024-06-04 16:01:14,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7849d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:01:14, skipping insertion in model container [2024-06-04 16:01:14,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:13" (3/4) ... [2024-06-04 16:01:14,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7849d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:01:14, skipping insertion in model container [2024-06-04 16:01:14,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:01:14" (4/4) ... [2024-06-04 16:01:14,038 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:01:14,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:01:14,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:01:14,054 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:01:14,121 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:01:14,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:01:14,210 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 16:01:14,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:01:14,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:01:14,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:01:14,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 16:01:14,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:01:14,241 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;@641e599a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:01:14,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:01:14,245 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:01:14,246 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:01:14,246 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:01:14,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:14,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:01:14,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:14,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:14,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1786995326, now seen corresponding path program 1 times [2024-06-04 16:01:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:14,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290114028] [2024-06-04 16:01:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:14,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:15,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:15,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290114028] [2024-06-04 16:01:15,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290114028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:15,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:15,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:01:15,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393091577] [2024-06-04 16:01:15,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:15,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:01:15,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:01:15,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:01:15,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-04 16:01:15,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:15,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:15,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-04 16:01:15,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:15,606 INFO L124 PetriNetUnfolderBase]: 471/808 cut-off events. [2024-06-04 16:01:15,607 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-04 16:01:15,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 808 events. 471/808 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3897 event pairs, 288 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-04 16:01:15,622 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-04 16:01:15,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-04 16:01:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:01:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:01:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-04 16:01:15,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-04 16:01:15,636 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-04 16:01:15,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-04 16:01:15,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:15,643 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 16:01:15,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-04 16:01:15,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 16:01:15,649 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 16:01:15,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:15,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:15,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:15,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:01:15,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:15,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:15,652 INFO L85 PathProgramCache]: Analyzing trace with hash -257083245, now seen corresponding path program 1 times [2024-06-04 16:01:15,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:15,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497140353] [2024-06-04 16:01:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:15,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:16,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:16,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497140353] [2024-06-04 16:01:16,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497140353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:16,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:16,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:16,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975648908] [2024-06-04 16:01:16,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:16,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:16,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:16,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:16,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:16,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:16,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:16,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:16,377 INFO L124 PetriNetUnfolderBase]: 754/1257 cut-off events. [2024-06-04 16:01:16,377 INFO L125 PetriNetUnfolderBase]: For 195/205 co-relation queries the response was YES. [2024-06-04 16:01:16,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 1257 events. 754/1257 cut-off events. For 195/205 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6122 event pairs, 318 based on Foata normal form. 6/1260 useless extension candidates. Maximal degree in co-relation 2846. Up to 1124 conditions per place. [2024-06-04 16:01:16,386 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-04 16:01:16,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 256 flow [2024-06-04 16:01:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-04 16:01:16,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-04 16:01:16,388 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 105 transitions. [2024-06-04 16:01:16,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 256 flow [2024-06-04 16:01:16,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:16,391 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-04 16:01:16,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-04 16:01:16,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-04 16:01:16,392 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-04 16:01:16,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:16,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:16,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:16,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:01:16,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:16,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:16,393 INFO L85 PathProgramCache]: Analyzing trace with hash 995354032, now seen corresponding path program 1 times [2024-06-04 16:01:16,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:16,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083249970] [2024-06-04 16:01:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:16,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:16,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:16,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083249970] [2024-06-04 16:01:16,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083249970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:16,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:16,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332247420] [2024-06-04 16:01:16,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:16,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:16,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:16,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:16,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:16,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:16,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:16,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:17,067 INFO L124 PetriNetUnfolderBase]: 745/1242 cut-off events. [2024-06-04 16:01:17,068 INFO L125 PetriNetUnfolderBase]: For 591/633 co-relation queries the response was YES. [2024-06-04 16:01:17,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 1242 events. 745/1242 cut-off events. For 591/633 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6050 event pairs, 218 based on Foata normal form. 19/1258 useless extension candidates. Maximal degree in co-relation 3157. Up to 1079 conditions per place. [2024-06-04 16:01:17,077 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2024-06-04 16:01:17,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 316 flow [2024-06-04 16:01:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-04 16:01:17,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:01:17,080 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 125 transitions. [2024-06-04 16:01:17,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 316 flow [2024-06-04 16:01:17,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 314 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:17,083 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 183 flow [2024-06-04 16:01:17,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-04 16:01:17,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-04 16:01:17,084 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 183 flow [2024-06-04 16:01:17,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:17,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:17,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:17,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:01:17,085 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:17,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:17,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1465943599, now seen corresponding path program 1 times [2024-06-04 16:01:17,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:17,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104143498] [2024-06-04 16:01:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:17,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:17,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:17,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104143498] [2024-06-04 16:01:17,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104143498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:17,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:17,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:17,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270304818] [2024-06-04 16:01:17,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:17,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:17,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:17,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:17,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:17,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:17,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:17,916 INFO L124 PetriNetUnfolderBase]: 697/1163 cut-off events. [2024-06-04 16:01:17,916 INFO L125 PetriNetUnfolderBase]: For 1029/1029 co-relation queries the response was YES. [2024-06-04 16:01:17,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3248 conditions, 1163 events. 697/1163 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5805 event pairs, 308 based on Foata normal form. 2/1164 useless extension candidates. Maximal degree in co-relation 3227. Up to 1047 conditions per place. [2024-06-04 16:01:17,926 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 46 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-04 16:01:17,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 356 flow [2024-06-04 16:01:17,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-04 16:01:17,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:01:17,928 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 183 flow. Second operand 4 states and 100 transitions. [2024-06-04 16:01:17,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 356 flow [2024-06-04 16:01:17,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 331 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:17,932 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 231 flow [2024-06-04 16:01:17,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-04 16:01:17,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-04 16:01:17,934 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 231 flow [2024-06-04 16:01:17,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:17,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:17,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:17,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:01:17,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:17,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:17,935 INFO L85 PathProgramCache]: Analyzing trace with hash 609729492, now seen corresponding path program 1 times [2024-06-04 16:01:17,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:17,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328572835] [2024-06-04 16:01:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:17,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:18,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:18,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328572835] [2024-06-04 16:01:18,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328572835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:18,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:18,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:18,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135931824] [2024-06-04 16:01:18,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:18,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:18,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:18,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:18,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:18,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:18,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:18,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:18,796 INFO L124 PetriNetUnfolderBase]: 826/1388 cut-off events. [2024-06-04 16:01:18,797 INFO L125 PetriNetUnfolderBase]: For 1903/1945 co-relation queries the response was YES. [2024-06-04 16:01:18,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4182 conditions, 1388 events. 826/1388 cut-off events. For 1903/1945 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6978 event pairs, 293 based on Foata normal form. 16/1385 useless extension candidates. Maximal degree in co-relation 4159. Up to 1177 conditions per place. [2024-06-04 16:01:18,808 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-04 16:01:18,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 465 flow [2024-06-04 16:01:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 16:01:18,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-04 16:01:18,811 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 231 flow. Second operand 5 states and 128 transitions. [2024-06-04 16:01:18,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 465 flow [2024-06-04 16:01:18,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 463 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:18,815 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 311 flow [2024-06-04 16:01:18,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-04 16:01:18,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-04 16:01:18,816 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 311 flow [2024-06-04 16:01:18,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:18,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:18,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:18,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:01:18,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:18,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash 631097172, now seen corresponding path program 2 times [2024-06-04 16:01:18,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:18,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067041584] [2024-06-04 16:01:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:18,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:19,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:19,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067041584] [2024-06-04 16:01:19,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067041584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:19,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:19,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:19,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274155597] [2024-06-04 16:01:19,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:19,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:19,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:19,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:19,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:19,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:19,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 311 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:19,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:19,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:19,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:19,618 INFO L124 PetriNetUnfolderBase]: 821/1381 cut-off events. [2024-06-04 16:01:19,619 INFO L125 PetriNetUnfolderBase]: For 3010/3058 co-relation queries the response was YES. [2024-06-04 16:01:19,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4573 conditions, 1381 events. 821/1381 cut-off events. For 3010/3058 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6942 event pairs, 293 based on Foata normal form. 18/1381 useless extension candidates. Maximal degree in co-relation 4547. Up to 1181 conditions per place. [2024-06-04 16:01:19,632 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-06-04 16:01:19,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 471 flow [2024-06-04 16:01:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-04 16:01:19,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-04 16:01:19,634 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 311 flow. Second operand 4 states and 105 transitions. [2024-06-04 16:01:19,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 471 flow [2024-06-04 16:01:19,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 446 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:19,640 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 330 flow [2024-06-04 16:01:19,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-04 16:01:19,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-04 16:01:19,642 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 330 flow [2024-06-04 16:01:19,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:19,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:19,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:19,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:01:19,643 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:19,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1033237428, now seen corresponding path program 1 times [2024-06-04 16:01:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:19,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145371512] [2024-06-04 16:01:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:20,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:20,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145371512] [2024-06-04 16:01:20,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145371512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:20,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:20,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:20,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700810153] [2024-06-04 16:01:20,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:20,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:20,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:20,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:20,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:20,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:20,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:20,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:20,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:20,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:20,413 INFO L124 PetriNetUnfolderBase]: 697/1171 cut-off events. [2024-06-04 16:01:20,413 INFO L125 PetriNetUnfolderBase]: For 3078/3080 co-relation queries the response was YES. [2024-06-04 16:01:20,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 1171 events. 697/1171 cut-off events. For 3078/3080 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5863 event pairs, 278 based on Foata normal form. 6/1176 useless extension candidates. Maximal degree in co-relation 4027. Up to 1029 conditions per place. [2024-06-04 16:01:20,423 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 57 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-04 16:01:20,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 74 transitions, 519 flow [2024-06-04 16:01:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-04 16:01:20,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-04 16:01:20,426 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 330 flow. Second operand 5 states and 121 transitions. [2024-06-04 16:01:20,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 74 transitions, 519 flow [2024-06-04 16:01:20,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 489 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:20,431 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 341 flow [2024-06-04 16:01:20,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-04 16:01:20,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-04 16:01:20,433 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 341 flow [2024-06-04 16:01:20,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:20,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:20,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:20,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:01:20,434 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:20,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:20,434 INFO L85 PathProgramCache]: Analyzing trace with hash -508420352, now seen corresponding path program 1 times [2024-06-04 16:01:20,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:20,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750804161] [2024-06-04 16:01:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:20,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:20,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:20,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750804161] [2024-06-04 16:01:20,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750804161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:20,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:20,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:20,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161133290] [2024-06-04 16:01:20,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:20,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:20,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:20,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:20,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:20,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:20,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:20,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:21,211 INFO L124 PetriNetUnfolderBase]: 888/1472 cut-off events. [2024-06-04 16:01:21,216 INFO L125 PetriNetUnfolderBase]: For 4343/4347 co-relation queries the response was YES. [2024-06-04 16:01:21,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5178 conditions, 1472 events. 888/1472 cut-off events. For 4343/4347 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7234 event pairs, 323 based on Foata normal form. 6/1476 useless extension candidates. Maximal degree in co-relation 5149. Up to 1228 conditions per place. [2024-06-04 16:01:21,230 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-04 16:01:21,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 96 transitions, 695 flow [2024-06-04 16:01:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:01:21,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:01:21,233 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 341 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:01:21,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 96 transitions, 695 flow [2024-06-04 16:01:21,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 672 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:21,243 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 467 flow [2024-06-04 16:01:21,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-04 16:01:21,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-04 16:01:21,246 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 467 flow [2024-06-04 16:01:21,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:21,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:21,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:21,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:01:21,247 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:21,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:21,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1910817844, now seen corresponding path program 2 times [2024-06-04 16:01:21,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:21,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800953192] [2024-06-04 16:01:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:21,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:21,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800953192] [2024-06-04 16:01:21,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800953192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:21,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:21,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:21,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529545155] [2024-06-04 16:01:21,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:21,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:21,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:21,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:21,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:21,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 467 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:21,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:21,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:21,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:22,046 INFO L124 PetriNetUnfolderBase]: 899/1495 cut-off events. [2024-06-04 16:01:22,047 INFO L125 PetriNetUnfolderBase]: For 5629/5639 co-relation queries the response was YES. [2024-06-04 16:01:22,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5645 conditions, 1495 events. 899/1495 cut-off events. For 5629/5639 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7406 event pairs, 310 based on Foata normal form. 12/1507 useless extension candidates. Maximal degree in co-relation 5613. Up to 1258 conditions per place. [2024-06-04 16:01:22,060 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2024-06-04 16:01:22,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 815 flow [2024-06-04 16:01:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:01:22,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-04 16:01:22,065 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 467 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:01:22,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 815 flow [2024-06-04 16:01:22,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 779 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:22,074 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 525 flow [2024-06-04 16:01:22,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2024-06-04 16:01:22,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-04 16:01:22,076 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 525 flow [2024-06-04 16:01:22,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:22,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:22,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:22,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:01:22,077 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:22,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1910823424, now seen corresponding path program 3 times [2024-06-04 16:01:22,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:22,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977915889] [2024-06-04 16:01:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:22,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:22,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:22,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977915889] [2024-06-04 16:01:22,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977915889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:22,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:22,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:22,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733574062] [2024-06-04 16:01:22,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:22,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:22,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:22,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:22,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:22,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 525 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:22,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:22,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:22,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:22,890 INFO L124 PetriNetUnfolderBase]: 894/1486 cut-off events. [2024-06-04 16:01:22,890 INFO L125 PetriNetUnfolderBase]: For 6653/6659 co-relation queries the response was YES. [2024-06-04 16:01:22,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5746 conditions, 1486 events. 894/1486 cut-off events. For 6653/6659 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7329 event pairs, 323 based on Foata normal form. 8/1492 useless extension candidates. Maximal degree in co-relation 5712. Up to 1253 conditions per place. [2024-06-04 16:01:22,908 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-04 16:01:22,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 754 flow [2024-06-04 16:01:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 16:01:22,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-04 16:01:22,910 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 525 flow. Second operand 5 states and 124 transitions. [2024-06-04 16:01:22,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 754 flow [2024-06-04 16:01:22,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 700 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:22,922 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 515 flow [2024-06-04 16:01:22,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=515, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-04 16:01:22,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-04 16:01:22,924 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 515 flow [2024-06-04 16:01:22,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:22,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:22,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:22,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:01:22,925 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:22,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:22,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1619345834, now seen corresponding path program 1 times [2024-06-04 16:01:22,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:22,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639286808] [2024-06-04 16:01:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:22,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:23,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:23,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639286808] [2024-06-04 16:01:23,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639286808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:23,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:23,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869568838] [2024-06-04 16:01:23,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:23,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:23,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:23,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:23,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 515 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:23,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:23,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:23,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:23,651 INFO L124 PetriNetUnfolderBase]: 832/1382 cut-off events. [2024-06-04 16:01:23,651 INFO L125 PetriNetUnfolderBase]: For 7418/7420 co-relation queries the response was YES. [2024-06-04 16:01:23,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5520 conditions, 1382 events. 832/1382 cut-off events. For 7418/7420 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6843 event pairs, 278 based on Foata normal form. 3/1372 useless extension candidates. Maximal degree in co-relation 5485. Up to 1228 conditions per place. [2024-06-04 16:01:23,669 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 71 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-06-04 16:01:23,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 745 flow [2024-06-04 16:01:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-04 16:01:23,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:01:23,671 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 515 flow. Second operand 4 states and 96 transitions. [2024-06-04 16:01:23,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 745 flow [2024-06-04 16:01:23,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 707 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:23,681 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 567 flow [2024-06-04 16:01:23,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=567, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-04 16:01:23,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-04 16:01:23,682 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 567 flow [2024-06-04 16:01:23,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:23,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:23,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:23,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:01:23,683 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:23,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:23,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1734872291, now seen corresponding path program 1 times [2024-06-04 16:01:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:23,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109244406] [2024-06-04 16:01:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:23,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:24,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:24,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109244406] [2024-06-04 16:01:24,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109244406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:24,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:24,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:24,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555913963] [2024-06-04 16:01:24,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:24,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:24,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:24,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:24,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:24,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:24,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 567 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) [2024-06-04 16:01:24,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:24,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:24,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:24,442 INFO L124 PetriNetUnfolderBase]: 854/1424 cut-off events. [2024-06-04 16:01:24,442 INFO L125 PetriNetUnfolderBase]: For 9336/9348 co-relation queries the response was YES. [2024-06-04 16:01:24,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6024 conditions, 1424 events. 854/1424 cut-off events. For 9336/9348 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7196 event pairs, 180 based on Foata normal form. 14/1390 useless extension candidates. Maximal degree in co-relation 5987. Up to 1100 conditions per place. [2024-06-04 16:01:24,455 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 32 changer transitions 0/112 dead transitions. [2024-06-04 16:01:24,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 903 flow [2024-06-04 16:01:24,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:01:24,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:01:24,457 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 567 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:01:24,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 903 flow [2024-06-04 16:01:24,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 899 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:24,471 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 674 flow [2024-06-04 16:01:24,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-04 16:01:24,473 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-04 16:01:24,473 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 674 flow [2024-06-04 16:01:24,473 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) [2024-06-04 16:01:24,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:24,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:24,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:01:24,474 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:24,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1834507795, now seen corresponding path program 2 times [2024-06-04 16:01:24,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:24,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431859679] [2024-06-04 16:01:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:24,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:24,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:24,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431859679] [2024-06-04 16:01:24,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431859679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:24,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:24,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:24,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386089903] [2024-06-04 16:01:24,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:24,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:24,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:24,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:24,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:24,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:24,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 674 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) [2024-06-04 16:01:24,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:24,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:24,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:25,221 INFO L124 PetriNetUnfolderBase]: 871/1451 cut-off events. [2024-06-04 16:01:25,222 INFO L125 PetriNetUnfolderBase]: For 11627/11646 co-relation queries the response was YES. [2024-06-04 16:01:25,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6503 conditions, 1451 events. 871/1451 cut-off events. For 11627/11646 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7348 event pairs, 252 based on Foata normal form. 12/1411 useless extension candidates. Maximal degree in co-relation 6463. Up to 1198 conditions per place. [2024-06-04 16:01:25,234 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 66 selfloop transitions, 30 changer transitions 0/111 dead transitions. [2024-06-04 16:01:25,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 111 transitions, 946 flow [2024-06-04 16:01:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:01:25,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:01:25,236 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 674 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:01:25,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 111 transitions, 946 flow [2024-06-04 16:01:25,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 111 transitions, 894 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:25,255 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 716 flow [2024-06-04 16:01:25,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=716, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-04 16:01:25,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-04 16:01:25,257 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 716 flow [2024-06-04 16:01:25,257 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) [2024-06-04 16:01:25,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:25,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:25,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:01:25,258 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:25,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:25,258 INFO L85 PathProgramCache]: Analyzing trace with hash 894011795, now seen corresponding path program 3 times [2024-06-04 16:01:25,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:25,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377091630] [2024-06-04 16:01:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:25,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:25,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:25,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377091630] [2024-06-04 16:01:25,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377091630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:25,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:25,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:25,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704443557] [2024-06-04 16:01:25,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:25,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:25,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:25,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 716 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) [2024-06-04 16:01:25,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:25,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:25,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:26,040 INFO L124 PetriNetUnfolderBase]: 859/1435 cut-off events. [2024-06-04 16:01:26,040 INFO L125 PetriNetUnfolderBase]: For 12686/12705 co-relation queries the response was YES. [2024-06-04 16:01:26,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6519 conditions, 1435 events. 859/1435 cut-off events. For 12686/12705 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7239 event pairs, 175 based on Foata normal form. 19/1405 useless extension candidates. Maximal degree in co-relation 6477. Up to 1161 conditions per place. [2024-06-04 16:01:26,054 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 27 changer transitions 0/107 dead transitions. [2024-06-04 16:01:26,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 948 flow [2024-06-04 16:01:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-04 16:01:26,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-04 16:01:26,056 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 716 flow. Second operand 5 states and 127 transitions. [2024-06-04 16:01:26,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 948 flow [2024-06-04 16:01:26,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 874 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:26,075 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 708 flow [2024-06-04 16:01:26,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=708, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-06-04 16:01:26,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-04 16:01:26,077 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 708 flow [2024-06-04 16:01:26,077 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) [2024-06-04 16:01:26,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:26,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:26,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:01:26,078 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:26,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash 946601761, now seen corresponding path program 1 times [2024-06-04 16:01:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:26,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265857640] [2024-06-04 16:01:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:26,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:26,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:26,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265857640] [2024-06-04 16:01:26,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265857640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:26,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:26,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:26,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557994257] [2024-06-04 16:01:26,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:26,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:26,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:26,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:26,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 708 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) [2024-06-04 16:01:26,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:26,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:26,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:26,940 INFO L124 PetriNetUnfolderBase]: 1027/1715 cut-off events. [2024-06-04 16:01:26,940 INFO L125 PetriNetUnfolderBase]: For 14612/14618 co-relation queries the response was YES. [2024-06-04 16:01:26,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7480 conditions, 1715 events. 1027/1715 cut-off events. For 14612/14618 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8881 event pairs, 225 based on Foata normal form. 18/1732 useless extension candidates. Maximal degree in co-relation 7437. Up to 1134 conditions per place. [2024-06-04 16:01:26,955 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 26 changer transitions 0/134 dead transitions. [2024-06-04 16:01:26,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 1180 flow [2024-06-04 16:01:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:01:26,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:01:26,957 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 708 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:01:26,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 1180 flow [2024-06-04 16:01:26,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 134 transitions, 1111 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:26,981 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 755 flow [2024-06-04 16:01:26,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=755, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2024-06-04 16:01:26,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-04 16:01:26,982 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 755 flow [2024-06-04 16:01:26,982 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) [2024-06-04 16:01:26,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:26,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:26,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:01:26,983 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:26,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:26,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1035167521, now seen corresponding path program 2 times [2024-06-04 16:01:26,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:26,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662169483] [2024-06-04 16:01:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:26,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:27,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:27,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662169483] [2024-06-04 16:01:27,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662169483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:27,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:27,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:27,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089670950] [2024-06-04 16:01:27,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:27,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:27,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:27,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:27,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 755 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) [2024-06-04 16:01:27,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:27,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:27,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:27,880 INFO L124 PetriNetUnfolderBase]: 1154/1928 cut-off events. [2024-06-04 16:01:27,881 INFO L125 PetriNetUnfolderBase]: For 18386/18392 co-relation queries the response was YES. [2024-06-04 16:01:27,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8654 conditions, 1928 events. 1154/1928 cut-off events. For 18386/18392 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10353 event pairs, 334 based on Foata normal form. 18/1945 useless extension candidates. Maximal degree in co-relation 8608. Up to 1458 conditions per place. [2024-06-04 16:01:27,897 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 25 changer transitions 0/134 dead transitions. [2024-06-04 16:01:27,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1204 flow [2024-06-04 16:01:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:01:27,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:01:27,899 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 755 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:01:27,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1204 flow [2024-06-04 16:01:27,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 134 transitions, 1174 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:27,933 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 813 flow [2024-06-04 16:01:27,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=813, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2024-06-04 16:01:27,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-04 16:01:27,934 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 813 flow [2024-06-04 16:01:27,934 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) [2024-06-04 16:01:27,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:27,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:27,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:01:27,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:27,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:27,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1035171241, now seen corresponding path program 3 times [2024-06-04 16:01:27,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:27,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023641383] [2024-06-04 16:01:27,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:27,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:28,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:28,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023641383] [2024-06-04 16:01:28,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023641383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:28,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:28,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956468236] [2024-06-04 16:01:28,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:28,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:28,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:28,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 813 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) [2024-06-04 16:01:28,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:28,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:28,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:28,828 INFO L124 PetriNetUnfolderBase]: 1126/1884 cut-off events. [2024-06-04 16:01:28,828 INFO L125 PetriNetUnfolderBase]: For 19358/19364 co-relation queries the response was YES. [2024-06-04 16:01:28,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8588 conditions, 1884 events. 1126/1884 cut-off events. For 19358/19364 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10022 event pairs, 335 based on Foata normal form. 22/1905 useless extension candidates. Maximal degree in co-relation 8539. Up to 1537 conditions per place. [2024-06-04 16:01:28,847 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 100 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2024-06-04 16:01:28,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 130 transitions, 1171 flow [2024-06-04 16:01:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:01:28,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:01:28,849 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 813 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:01:28,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 130 transitions, 1171 flow [2024-06-04 16:01:28,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 130 transitions, 1139 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:28,887 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 850 flow [2024-06-04 16:01:28,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2024-06-04 16:01:28,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-04 16:01:28,888 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 850 flow [2024-06-04 16:01:28,888 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) [2024-06-04 16:01:28,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:28,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:28,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:01:28,889 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:28,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1950072843, now seen corresponding path program 4 times [2024-06-04 16:01:28,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:28,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188755082] [2024-06-04 16:01:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:29,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:29,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188755082] [2024-06-04 16:01:29,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188755082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:29,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:29,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:29,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572487184] [2024-06-04 16:01:29,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:29,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:29,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:29,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:29,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:29,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:29,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 850 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) [2024-06-04 16:01:29,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:29,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:29,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:29,755 INFO L124 PetriNetUnfolderBase]: 1184/1983 cut-off events. [2024-06-04 16:01:29,755 INFO L125 PetriNetUnfolderBase]: For 21617/21625 co-relation queries the response was YES. [2024-06-04 16:01:29,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9140 conditions, 1983 events. 1184/1983 cut-off events. For 21617/21625 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10736 event pairs, 339 based on Foata normal form. 24/2007 useless extension candidates. Maximal degree in co-relation 9089. Up to 1653 conditions per place. [2024-06-04 16:01:29,776 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 108 selfloop transitions, 21 changer transitions 0/135 dead transitions. [2024-06-04 16:01:29,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 1227 flow [2024-06-04 16:01:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:01:29,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-04 16:01:29,778 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 850 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:01:29,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 1227 flow [2024-06-04 16:01:29,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 135 transitions, 1182 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:29,816 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 867 flow [2024-06-04 16:01:29,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=867, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2024-06-04 16:01:29,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-04 16:01:29,817 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 867 flow [2024-06-04 16:01:29,817 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) [2024-06-04 16:01:29,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:29,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:01:29,818 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:29,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1944710463, now seen corresponding path program 5 times [2024-06-04 16:01:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014397191] [2024-06-04 16:01:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:29,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:30,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:30,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014397191] [2024-06-04 16:01:30,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014397191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:30,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:30,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:30,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352404673] [2024-06-04 16:01:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:30,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:30,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:30,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:30,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:30,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 98 transitions, 867 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) [2024-06-04 16:01:30,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:30,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:30,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:30,740 INFO L124 PetriNetUnfolderBase]: 1217/2051 cut-off events. [2024-06-04 16:01:30,741 INFO L125 PetriNetUnfolderBase]: For 23504/23510 co-relation queries the response was YES. [2024-06-04 16:01:30,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9443 conditions, 2051 events. 1217/2051 cut-off events. For 23504/23510 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11240 event pairs, 360 based on Foata normal form. 22/2072 useless extension candidates. Maximal degree in co-relation 9391. Up to 1712 conditions per place. [2024-06-04 16:01:30,761 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 19 changer transitions 0/128 dead transitions. [2024-06-04 16:01:30,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 128 transitions, 1212 flow [2024-06-04 16:01:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:01:30,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:01:30,764 INFO L175 Difference]: Start difference. First operand has 104 places, 98 transitions, 867 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:01:30,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 128 transitions, 1212 flow [2024-06-04 16:01:30,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1169 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:30,802 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 884 flow [2024-06-04 16:01:30,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=884, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-06-04 16:01:30,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-04 16:01:30,803 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 884 flow [2024-06-04 16:01:30,803 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) [2024-06-04 16:01:30,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:30,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:30,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:01:30,804 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:30,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1944562593, now seen corresponding path program 6 times [2024-06-04 16:01:30,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:30,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677100845] [2024-06-04 16:01:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:31,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677100845] [2024-06-04 16:01:31,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677100845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:31,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:31,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:31,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238998697] [2024-06-04 16:01:31,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:31,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:31,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:31,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:31,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:31,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:31,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 884 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) [2024-06-04 16:01:31,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:31,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:31,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:31,692 INFO L124 PetriNetUnfolderBase]: 1197/2019 cut-off events. [2024-06-04 16:01:31,692 INFO L125 PetriNetUnfolderBase]: For 23089/23095 co-relation queries the response was YES. [2024-06-04 16:01:31,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9230 conditions, 2019 events. 1197/2019 cut-off events. For 23089/23095 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11034 event pairs, 251 based on Foata normal form. 18/2036 useless extension candidates. Maximal degree in co-relation 9177. Up to 1471 conditions per place. [2024-06-04 16:01:31,711 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 104 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-04 16:01:31,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1256 flow [2024-06-04 16:01:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:01:31,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-04 16:01:31,713 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 884 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:01:31,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1256 flow [2024-06-04 16:01:31,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 1211 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:31,750 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 924 flow [2024-06-04 16:01:31,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=924, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2024-06-04 16:01:31,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-04 16:01:31,750 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 924 flow [2024-06-04 16:01:31,751 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) [2024-06-04 16:01:31,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:31,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:31,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:01:31,751 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:31,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:31,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1950288045, now seen corresponding path program 1 times [2024-06-04 16:01:31,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:31,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850541079] [2024-06-04 16:01:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:31,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:32,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:32,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850541079] [2024-06-04 16:01:32,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850541079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:32,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:32,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:32,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840426209] [2024-06-04 16:01:32,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:32,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:32,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:32,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:32,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 924 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) [2024-06-04 16:01:32,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:32,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:32,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:32,629 INFO L124 PetriNetUnfolderBase]: 1177/1988 cut-off events. [2024-06-04 16:01:32,629 INFO L125 PetriNetUnfolderBase]: For 23054/23062 co-relation queries the response was YES. [2024-06-04 16:01:32,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9074 conditions, 1988 events. 1177/1988 cut-off events. For 23054/23062 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10803 event pairs, 285 based on Foata normal form. 20/2008 useless extension candidates. Maximal degree in co-relation 9019. Up to 1441 conditions per place. [2024-06-04 16:01:32,647 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 110 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-06-04 16:01:32,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 141 transitions, 1278 flow [2024-06-04 16:01:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:01:32,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 16:01:32,650 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 924 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:01:32,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 141 transitions, 1278 flow [2024-06-04 16:01:32,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 141 transitions, 1202 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:32,681 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 862 flow [2024-06-04 16:01:32,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=862, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2024-06-04 16:01:32,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-04 16:01:32,682 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 862 flow [2024-06-04 16:01:32,682 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) [2024-06-04 16:01:32,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:32,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:32,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:01:32,683 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:32,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1240255241, now seen corresponding path program 1 times [2024-06-04 16:01:32,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:32,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308202954] [2024-06-04 16:01:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:32,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:33,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:33,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308202954] [2024-06-04 16:01:33,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308202954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:33,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:33,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:33,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752421752] [2024-06-04 16:01:33,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:33,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:33,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:33,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:33,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 862 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:33,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:33,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:33,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:33,510 INFO L124 PetriNetUnfolderBase]: 1127/1918 cut-off events. [2024-06-04 16:01:33,510 INFO L125 PetriNetUnfolderBase]: For 22664/22667 co-relation queries the response was YES. [2024-06-04 16:01:33,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8746 conditions, 1918 events. 1127/1918 cut-off events. For 22664/22667 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10559 event pairs, 308 based on Foata normal form. 5/1908 useless extension candidates. Maximal degree in co-relation 8691. Up to 1703 conditions per place. [2024-06-04 16:01:33,529 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 80 selfloop transitions, 19 changer transitions 0/111 dead transitions. [2024-06-04 16:01:33,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 1102 flow [2024-06-04 16:01:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-04 16:01:33,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:01:33,530 INFO L175 Difference]: Start difference. First operand has 109 places, 100 transitions, 862 flow. Second operand 4 states and 97 transitions. [2024-06-04 16:01:33,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 1102 flow [2024-06-04 16:01:33,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 1032 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:33,565 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 870 flow [2024-06-04 16:01:33,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=870, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2024-06-04 16:01:33,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-04 16:01:33,566 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 870 flow [2024-06-04 16:01:33,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:33,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:33,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:01:33,567 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:33,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1551885911, now seen corresponding path program 2 times [2024-06-04 16:01:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:33,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708480824] [2024-06-04 16:01:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:34,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:34,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708480824] [2024-06-04 16:01:34,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708480824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:34,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:34,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:34,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327712063] [2024-06-04 16:01:34,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:34,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:34,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:34,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:34,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:34,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:34,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 870 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:34,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:34,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:34,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:34,404 INFO L124 PetriNetUnfolderBase]: 1121/1907 cut-off events. [2024-06-04 16:01:34,405 INFO L125 PetriNetUnfolderBase]: For 23401/23406 co-relation queries the response was YES. [2024-06-04 16:01:34,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8692 conditions, 1907 events. 1121/1907 cut-off events. For 23401/23406 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10512 event pairs, 296 based on Foata normal form. 5/1899 useless extension candidates. Maximal degree in co-relation 8637. Up to 1690 conditions per place. [2024-06-04 16:01:34,423 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 89 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-06-04 16:01:34,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 124 transitions, 1169 flow [2024-06-04 16:01:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 16:01:34,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-04 16:01:34,426 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 870 flow. Second operand 7 states and 156 transitions. [2024-06-04 16:01:34,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 124 transitions, 1169 flow [2024-06-04 16:01:34,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 124 transitions, 1119 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:34,470 INFO L231 Difference]: Finished difference. Result has 111 places, 106 transitions, 906 flow [2024-06-04 16:01:34,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=906, PETRI_PLACES=111, PETRI_TRANSITIONS=106} [2024-06-04 16:01:34,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-04 16:01:34,471 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 106 transitions, 906 flow [2024-06-04 16:01:34,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:34,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:34,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:34,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:01:34,472 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:34,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:34,472 INFO L85 PathProgramCache]: Analyzing trace with hash -100791535, now seen corresponding path program 1 times [2024-06-04 16:01:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:34,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180992480] [2024-06-04 16:01:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:34,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:34,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:34,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180992480] [2024-06-04 16:01:34,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180992480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:34,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:34,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:34,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246141367] [2024-06-04 16:01:34,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:34,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:34,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:35,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:35,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 106 transitions, 906 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:35,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:35,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:35,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:35,212 INFO L124 PetriNetUnfolderBase]: 1109/1924 cut-off events. [2024-06-04 16:01:35,212 INFO L125 PetriNetUnfolderBase]: For 23977/23979 co-relation queries the response was YES. [2024-06-04 16:01:35,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8835 conditions, 1924 events. 1109/1924 cut-off events. For 23977/23979 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10766 event pairs, 306 based on Foata normal form. 4/1927 useless extension candidates. Maximal degree in co-relation 8779. Up to 1700 conditions per place. [2024-06-04 16:01:35,229 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 94 selfloop transitions, 22 changer transitions 0/125 dead transitions. [2024-06-04 16:01:35,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 125 transitions, 1274 flow [2024-06-04 16:01:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-04 16:01:35,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-04 16:01:35,230 INFO L175 Difference]: Start difference. First operand has 111 places, 106 transitions, 906 flow. Second operand 5 states and 119 transitions. [2024-06-04 16:01:35,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 125 transitions, 1274 flow [2024-06-04 16:01:35,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 1182 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:35,274 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 930 flow [2024-06-04 16:01:35,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=930, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-06-04 16:01:35,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-04 16:01:35,275 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 930 flow [2024-06-04 16:01:35,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:35,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:35,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:35,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:01:35,276 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:35,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash -57282415, now seen corresponding path program 2 times [2024-06-04 16:01:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:35,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022383304] [2024-06-04 16:01:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:35,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:35,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022383304] [2024-06-04 16:01:35,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022383304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:35,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:35,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:35,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54523926] [2024-06-04 16:01:35,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:35,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:35,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:35,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:35,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:35,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 930 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:35,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:35,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:35,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:36,099 INFO L124 PetriNetUnfolderBase]: 1104/1917 cut-off events. [2024-06-04 16:01:36,100 INFO L125 PetriNetUnfolderBase]: For 25770/25772 co-relation queries the response was YES. [2024-06-04 16:01:36,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8990 conditions, 1917 events. 1104/1917 cut-off events. For 25770/25772 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10754 event pairs, 306 based on Foata normal form. 4/1920 useless extension candidates. Maximal degree in co-relation 8936. Up to 1701 conditions per place. [2024-06-04 16:01:36,119 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 95 selfloop transitions, 19 changer transitions 0/123 dead transitions. [2024-06-04 16:01:36,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 123 transitions, 1186 flow [2024-06-04 16:01:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-04 16:01:36,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:01:36,121 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 930 flow. Second operand 4 states and 100 transitions. [2024-06-04 16:01:36,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 123 transitions, 1186 flow [2024-06-04 16:01:36,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 123 transitions, 1131 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:36,177 INFO L231 Difference]: Finished difference. Result has 112 places, 112 transitions, 925 flow [2024-06-04 16:01:36,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=925, PETRI_PLACES=112, PETRI_TRANSITIONS=112} [2024-06-04 16:01:36,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-04 16:01:36,178 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 112 transitions, 925 flow [2024-06-04 16:01:36,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:36,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:36,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:36,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:01:36,180 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:36,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1551871031, now seen corresponding path program 1 times [2024-06-04 16:01:36,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:36,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970749411] [2024-06-04 16:01:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:36,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:36,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:36,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970749411] [2024-06-04 16:01:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970749411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:36,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:36,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:36,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584232756] [2024-06-04 16:01:36,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:36,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:36,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:36,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:36,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:36,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:36,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 112 transitions, 925 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:36,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:36,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:36,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:36,868 INFO L124 PetriNetUnfolderBase]: 1111/1912 cut-off events. [2024-06-04 16:01:36,868 INFO L125 PetriNetUnfolderBase]: For 27231/27236 co-relation queries the response was YES. [2024-06-04 16:01:36,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8948 conditions, 1912 events. 1111/1912 cut-off events. For 27231/27236 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10594 event pairs, 292 based on Foata normal form. 7/1906 useless extension candidates. Maximal degree in co-relation 8892. Up to 1704 conditions per place. [2024-06-04 16:01:36,884 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 102 selfloop transitions, 11 changer transitions 0/125 dead transitions. [2024-06-04 16:01:36,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 125 transitions, 1196 flow [2024-06-04 16:01:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-04 16:01:36,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-04 16:01:36,885 INFO L175 Difference]: Start difference. First operand has 112 places, 112 transitions, 925 flow. Second operand 5 states and 113 transitions. [2024-06-04 16:01:36,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 125 transitions, 1196 flow [2024-06-04 16:01:36,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 125 transitions, 1158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:36,930 INFO L231 Difference]: Finished difference. Result has 114 places, 114 transitions, 934 flow [2024-06-04 16:01:36,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=934, PETRI_PLACES=114, PETRI_TRANSITIONS=114} [2024-06-04 16:01:36,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-04 16:01:36,931 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 114 transitions, 934 flow [2024-06-04 16:01:36,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:36,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:36,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:36,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:01:36,932 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:36,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:36,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1195761377, now seen corresponding path program 1 times [2024-06-04 16:01:36,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:36,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793393851] [2024-06-04 16:01:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:36,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:37,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:37,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793393851] [2024-06-04 16:01:37,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793393851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:37,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:37,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:37,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132368744] [2024-06-04 16:01:37,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:37,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:37,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:37,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:37,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:37,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 114 transitions, 934 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:37,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:37,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:37,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:37,797 INFO L124 PetriNetUnfolderBase]: 1193/2032 cut-off events. [2024-06-04 16:01:37,797 INFO L125 PetriNetUnfolderBase]: For 28770/28776 co-relation queries the response was YES. [2024-06-04 16:01:37,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9603 conditions, 2032 events. 1193/2032 cut-off events. For 28770/28776 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11235 event pairs, 308 based on Foata normal form. 7/2039 useless extension candidates. Maximal degree in co-relation 9546. Up to 1807 conditions per place. [2024-06-04 16:01:37,810 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 118 selfloop transitions, 26 changer transitions 0/150 dead transitions. [2024-06-04 16:01:37,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 150 transitions, 1441 flow [2024-06-04 16:01:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:37,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-04 16:01:37,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-04 16:01:37,811 INFO L175 Difference]: Start difference. First operand has 114 places, 114 transitions, 934 flow. Second operand 8 states and 170 transitions. [2024-06-04 16:01:37,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 150 transitions, 1441 flow [2024-06-04 16:01:37,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 150 transitions, 1405 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:37,858 INFO L231 Difference]: Finished difference. Result has 121 places, 129 transitions, 1100 flow [2024-06-04 16:01:37,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1100, PETRI_PLACES=121, PETRI_TRANSITIONS=129} [2024-06-04 16:01:37,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-04 16:01:37,859 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 129 transitions, 1100 flow [2024-06-04 16:01:37,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:37,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:37,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:37,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:01:37,860 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:37,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash -163904445, now seen corresponding path program 2 times [2024-06-04 16:01:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:37,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678132238] [2024-06-04 16:01:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:37,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:38,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:38,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678132238] [2024-06-04 16:01:38,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678132238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:38,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:38,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:38,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373956780] [2024-06-04 16:01:38,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:38,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:38,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:38,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:38,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 129 transitions, 1100 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:38,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:38,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:38,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:38,661 INFO L124 PetriNetUnfolderBase]: 1198/2041 cut-off events. [2024-06-04 16:01:38,661 INFO L125 PetriNetUnfolderBase]: For 31530/31538 co-relation queries the response was YES. [2024-06-04 16:01:38,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 2041 events. 1198/2041 cut-off events. For 31530/31538 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11296 event pairs, 308 based on Foata normal form. 9/2050 useless extension candidates. Maximal degree in co-relation 9916. Up to 1813 conditions per place. [2024-06-04 16:01:38,674 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 118 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2024-06-04 16:01:38,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 152 transitions, 1524 flow [2024-06-04 16:01:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-04 16:01:38,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-04 16:01:38,676 INFO L175 Difference]: Start difference. First operand has 121 places, 129 transitions, 1100 flow. Second operand 7 states and 153 transitions. [2024-06-04 16:01:38,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 152 transitions, 1524 flow [2024-06-04 16:01:38,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 152 transitions, 1460 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:38,715 INFO L231 Difference]: Finished difference. Result has 125 places, 132 transitions, 1128 flow [2024-06-04 16:01:38,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1128, PETRI_PLACES=125, PETRI_TRANSITIONS=132} [2024-06-04 16:01:38,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-04 16:01:38,716 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 132 transitions, 1128 flow [2024-06-04 16:01:38,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:38,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:38,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:38,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:01:38,717 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:38,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash -163893285, now seen corresponding path program 3 times [2024-06-04 16:01:38,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:38,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871597824] [2024-06-04 16:01:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:38,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:39,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:39,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871597824] [2024-06-04 16:01:39,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871597824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:39,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:39,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909702522] [2024-06-04 16:01:39,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:39,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:39,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:39,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 132 transitions, 1128 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:39,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:39,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:39,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:39,425 INFO L124 PetriNetUnfolderBase]: 1195/2034 cut-off events. [2024-06-04 16:01:39,425 INFO L125 PetriNetUnfolderBase]: For 33326/33326 co-relation queries the response was YES. [2024-06-04 16:01:39,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9975 conditions, 2034 events. 1195/2034 cut-off events. For 33326/33326 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11197 event pairs, 317 based on Foata normal form. 1/2034 useless extension candidates. Maximal degree in co-relation 9914. Up to 1810 conditions per place. [2024-06-04 16:01:39,438 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 26 changer transitions 0/143 dead transitions. [2024-06-04 16:01:39,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 143 transitions, 1434 flow [2024-06-04 16:01:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-04 16:01:39,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-04 16:01:39,440 INFO L175 Difference]: Start difference. First operand has 125 places, 132 transitions, 1128 flow. Second operand 5 states and 113 transitions. [2024-06-04 16:01:39,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 143 transitions, 1434 flow [2024-06-04 16:01:39,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 143 transitions, 1368 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:39,482 INFO L231 Difference]: Finished difference. Result has 125 places, 132 transitions, 1120 flow [2024-06-04 16:01:39,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1120, PETRI_PLACES=125, PETRI_TRANSITIONS=132} [2024-06-04 16:01:39,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-04 16:01:39,483 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 132 transitions, 1120 flow [2024-06-04 16:01:39,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:39,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:39,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:39,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:01:39,483 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:39,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:39,483 INFO L85 PathProgramCache]: Analyzing trace with hash -863822117, now seen corresponding path program 4 times [2024-06-04 16:01:39,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:39,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003678714] [2024-06-04 16:01:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:39,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:39,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:39,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003678714] [2024-06-04 16:01:39,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003678714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:39,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:39,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:39,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351932019] [2024-06-04 16:01:39,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:39,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:39,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:39,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:39,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:39,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:39,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 132 transitions, 1120 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:39,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:39,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:39,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:40,273 INFO L124 PetriNetUnfolderBase]: 1192/2018 cut-off events. [2024-06-04 16:01:40,273 INFO L125 PetriNetUnfolderBase]: For 32509/32509 co-relation queries the response was YES. [2024-06-04 16:01:40,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9899 conditions, 2018 events. 1192/2018 cut-off events. For 32509/32509 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11060 event pairs, 298 based on Foata normal form. 1/2019 useless extension candidates. Maximal degree in co-relation 9838. Up to 1800 conditions per place. [2024-06-04 16:01:40,286 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 121 selfloop transitions, 34 changer transitions 0/161 dead transitions. [2024-06-04 16:01:40,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 161 transitions, 1541 flow [2024-06-04 16:01:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-04 16:01:40,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-04 16:01:40,287 INFO L175 Difference]: Start difference. First operand has 125 places, 132 transitions, 1120 flow. Second operand 8 states and 169 transitions. [2024-06-04 16:01:40,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 161 transitions, 1541 flow [2024-06-04 16:01:40,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 161 transitions, 1485 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:40,331 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 1215 flow [2024-06-04 16:01:40,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1215, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2024-06-04 16:01:40,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-04 16:01:40,332 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 1215 flow [2024-06-04 16:01:40,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:40,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:40,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:40,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:01:40,333 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:40,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:40,333 INFO L85 PathProgramCache]: Analyzing trace with hash 653254931, now seen corresponding path program 1 times [2024-06-04 16:01:40,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:40,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597420656] [2024-06-04 16:01:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:40,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:40,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:40,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597420656] [2024-06-04 16:01:40,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597420656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:40,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:40,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908447921] [2024-06-04 16:01:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:40,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:40,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:40,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:40,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 1215 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:40,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:40,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:40,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:41,024 INFO L124 PetriNetUnfolderBase]: 1197/2028 cut-off events. [2024-06-04 16:01:41,025 INFO L125 PetriNetUnfolderBase]: For 34732/34734 co-relation queries the response was YES. [2024-06-04 16:01:41,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10263 conditions, 2028 events. 1197/2028 cut-off events. For 34732/34734 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11131 event pairs, 306 based on Foata normal form. 3/2031 useless extension candidates. Maximal degree in co-relation 10199. Up to 1823 conditions per place. [2024-06-04 16:01:41,037 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 141 selfloop transitions, 22 changer transitions 0/169 dead transitions. [2024-06-04 16:01:41,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 169 transitions, 1733 flow [2024-06-04 16:01:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-04 16:01:41,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-04 16:01:41,039 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 1215 flow. Second operand 6 states and 134 transitions. [2024-06-04 16:01:41,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 169 transitions, 1733 flow [2024-06-04 16:01:41,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 169 transitions, 1711 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:41,090 INFO L231 Difference]: Finished difference. Result has 139 places, 153 transitions, 1364 flow [2024-06-04 16:01:41,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1364, PETRI_PLACES=139, PETRI_TRANSITIONS=153} [2024-06-04 16:01:41,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-04 16:01:41,090 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 153 transitions, 1364 flow [2024-06-04 16:01:41,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:41,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:41,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:41,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:01:41,091 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:41,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:41,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1775753625, now seen corresponding path program 2 times [2024-06-04 16:01:41,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:41,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873833562] [2024-06-04 16:01:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:41,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:41,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:41,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873833562] [2024-06-04 16:01:41,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873833562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:41,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:41,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:41,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945457841] [2024-06-04 16:01:41,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:41,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:41,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:41,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:41,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:41,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 153 transitions, 1364 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:41,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:41,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:41,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:42,082 INFO L124 PetriNetUnfolderBase]: 1202/2037 cut-off events. [2024-06-04 16:01:42,083 INFO L125 PetriNetUnfolderBase]: For 37824/37828 co-relation queries the response was YES. [2024-06-04 16:01:42,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10700 conditions, 2037 events. 1202/2037 cut-off events. For 37824/37828 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11197 event pairs, 306 based on Foata normal form. 5/2042 useless extension candidates. Maximal degree in co-relation 10631. Up to 1835 conditions per place. [2024-06-04 16:01:42,098 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 145 selfloop transitions, 20 changer transitions 0/171 dead transitions. [2024-06-04 16:01:42,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 171 transitions, 1827 flow [2024-06-04 16:01:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:42,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-04 16:01:42,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-04 16:01:42,099 INFO L175 Difference]: Start difference. First operand has 139 places, 153 transitions, 1364 flow. Second operand 5 states and 117 transitions. [2024-06-04 16:01:42,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 171 transitions, 1827 flow [2024-06-04 16:01:42,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 171 transitions, 1775 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:42,153 INFO L231 Difference]: Finished difference. Result has 143 places, 157 transitions, 1408 flow [2024-06-04 16:01:42,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1408, PETRI_PLACES=143, PETRI_TRANSITIONS=157} [2024-06-04 16:01:42,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-04 16:01:42,154 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 157 transitions, 1408 flow [2024-06-04 16:01:42,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:42,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:42,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:42,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:01:42,155 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:42,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:42,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1775748045, now seen corresponding path program 3 times [2024-06-04 16:01:42,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:42,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213757117] [2024-06-04 16:01:42,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:42,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:42,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:42,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213757117] [2024-06-04 16:01:42,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213757117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:42,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:42,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:42,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538485533] [2024-06-04 16:01:42,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:42,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:42,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:42,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:42,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 157 transitions, 1408 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:42,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:42,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:42,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:42,894 INFO L124 PetriNetUnfolderBase]: 1199/2033 cut-off events. [2024-06-04 16:01:42,894 INFO L125 PetriNetUnfolderBase]: For 39684/39688 co-relation queries the response was YES. [2024-06-04 16:01:42,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10713 conditions, 2033 events. 1199/2033 cut-off events. For 39684/39688 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11164 event pairs, 304 based on Foata normal form. 5/2038 useless extension candidates. Maximal degree in co-relation 10642. Up to 1832 conditions per place. [2024-06-04 16:01:42,908 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 23 changer transitions 0/173 dead transitions. [2024-06-04 16:01:42,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 173 transitions, 1791 flow [2024-06-04 16:01:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-04 16:01:42,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-04 16:01:42,909 INFO L175 Difference]: Start difference. First operand has 143 places, 157 transitions, 1408 flow. Second operand 7 states and 149 transitions. [2024-06-04 16:01:42,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 173 transitions, 1791 flow [2024-06-04 16:01:43,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 173 transitions, 1727 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:43,011 INFO L231 Difference]: Finished difference. Result has 147 places, 158 transitions, 1406 flow [2024-06-04 16:01:43,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1406, PETRI_PLACES=147, PETRI_TRANSITIONS=158} [2024-06-04 16:01:43,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-04 16:01:43,012 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 158 transitions, 1406 flow [2024-06-04 16:01:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:43,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:43,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:43,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:01:43,012 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:43,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:43,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1408165366, now seen corresponding path program 1 times [2024-06-04 16:01:43,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:43,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730566504] [2024-06-04 16:01:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:43,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:43,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:43,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730566504] [2024-06-04 16:01:43,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730566504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:43,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:43,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:43,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678073238] [2024-06-04 16:01:43,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:43,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:43,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:43,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:43,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:43,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:43,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 158 transitions, 1406 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-04 16:01:43,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:43,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:43,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:43,892 INFO L124 PetriNetUnfolderBase]: 1186/2014 cut-off events. [2024-06-04 16:01:43,892 INFO L125 PetriNetUnfolderBase]: For 43872/43877 co-relation queries the response was YES. [2024-06-04 16:01:43,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10724 conditions, 2014 events. 1186/2014 cut-off events. For 43872/43877 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11185 event pairs, 308 based on Foata normal form. 9/2007 useless extension candidates. Maximal degree in co-relation 10652. Up to 1725 conditions per place. [2024-06-04 16:01:43,908 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 122 selfloop transitions, 27 changer transitions 0/170 dead transitions. [2024-06-04 16:01:43,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 170 transitions, 1756 flow [2024-06-04 16:01:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-04 16:01:43,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-04 16:01:43,910 INFO L175 Difference]: Start difference. First operand has 147 places, 158 transitions, 1406 flow. Second operand 5 states and 116 transitions. [2024-06-04 16:01:43,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 170 transitions, 1756 flow [2024-06-04 16:01:44,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 170 transitions, 1704 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:44,022 INFO L231 Difference]: Finished difference. Result has 147 places, 160 transitions, 1450 flow [2024-06-04 16:01:44,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1450, PETRI_PLACES=147, PETRI_TRANSITIONS=160} [2024-06-04 16:01:44,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-04 16:01:44,022 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 160 transitions, 1450 flow [2024-06-04 16:01:44,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-04 16:01:44,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:44,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:44,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:01:44,023 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:44,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:44,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1008668056, now seen corresponding path program 2 times [2024-06-04 16:01:44,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:44,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515667662] [2024-06-04 16:01:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:44,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:44,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:44,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515667662] [2024-06-04 16:01:44,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515667662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:44,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:44,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:44,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418491282] [2024-06-04 16:01:44,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:44,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:44,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:44,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:44,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 160 transitions, 1450 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-04 16:01:44,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:44,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:44,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:44,898 INFO L124 PetriNetUnfolderBase]: 1184/2017 cut-off events. [2024-06-04 16:01:44,898 INFO L125 PetriNetUnfolderBase]: For 46551/46551 co-relation queries the response was YES. [2024-06-04 16:01:44,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 2017 events. 1184/2017 cut-off events. For 46551/46551 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11215 event pairs, 296 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 10860. Up to 1739 conditions per place. [2024-06-04 16:01:44,913 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 129 selfloop transitions, 32 changer transitions 0/182 dead transitions. [2024-06-04 16:01:44,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 182 transitions, 1855 flow [2024-06-04 16:01:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 16:01:44,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:01:44,914 INFO L175 Difference]: Start difference. First operand has 147 places, 160 transitions, 1450 flow. Second operand 8 states and 174 transitions. [2024-06-04 16:01:44,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 182 transitions, 1855 flow [2024-06-04 16:01:44,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 182 transitions, 1787 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:45,002 INFO L231 Difference]: Finished difference. Result has 152 places, 162 transitions, 1488 flow [2024-06-04 16:01:45,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1488, PETRI_PLACES=152, PETRI_TRANSITIONS=162} [2024-06-04 16:01:45,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-04 16:01:45,003 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 162 transitions, 1488 flow [2024-06-04 16:01:45,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-04 16:01:45,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:45,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:45,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:01:45,004 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:45,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:45,004 INFO L85 PathProgramCache]: Analyzing trace with hash -994383256, now seen corresponding path program 3 times [2024-06-04 16:01:45,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:45,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770616572] [2024-06-04 16:01:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:45,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:45,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:45,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770616572] [2024-06-04 16:01:45,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770616572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:45,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:45,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:45,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497725565] [2024-06-04 16:01:45,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:45,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:45,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:45,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:45,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 162 transitions, 1488 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-04 16:01:45,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:45,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:45,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:45,802 INFO L124 PetriNetUnfolderBase]: 1174/2003 cut-off events. [2024-06-04 16:01:45,802 INFO L125 PetriNetUnfolderBase]: For 47065/47065 co-relation queries the response was YES. [2024-06-04 16:01:45,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10845 conditions, 2003 events. 1174/2003 cut-off events. For 47065/47065 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11143 event pairs, 290 based on Foata normal form. 4/1993 useless extension candidates. Maximal degree in co-relation 10771. Up to 1687 conditions per place. [2024-06-04 16:01:45,817 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 126 selfloop transitions, 38 changer transitions 0/185 dead transitions. [2024-06-04 16:01:45,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 185 transitions, 1905 flow [2024-06-04 16:01:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-04 16:01:45,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-04 16:01:45,818 INFO L175 Difference]: Start difference. First operand has 152 places, 162 transitions, 1488 flow. Second operand 8 states and 175 transitions. [2024-06-04 16:01:45,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 185 transitions, 1905 flow [2024-06-04 16:01:45,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 185 transitions, 1817 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:45,890 INFO L231 Difference]: Finished difference. Result has 154 places, 164 transitions, 1521 flow [2024-06-04 16:01:45,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1521, PETRI_PLACES=154, PETRI_TRANSITIONS=164} [2024-06-04 16:01:45,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-04 16:01:45,890 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 164 transitions, 1521 flow [2024-06-04 16:01:45,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-04 16:01:45,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:45,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:45,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:01:45,891 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:45,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1479793488, now seen corresponding path program 1 times [2024-06-04 16:01:45,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:45,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119577601] [2024-06-04 16:01:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:45,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:46,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:46,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119577601] [2024-06-04 16:01:46,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119577601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:46,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:46,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:46,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092971906] [2024-06-04 16:01:46,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:46,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:46,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:46,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:46,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:46,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 164 transitions, 1521 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:46,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:46,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:46,630 INFO L124 PetriNetUnfolderBase]: 1186/2028 cut-off events. [2024-06-04 16:01:46,631 INFO L125 PetriNetUnfolderBase]: For 50375/50379 co-relation queries the response was YES. [2024-06-04 16:01:46,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11076 conditions, 2028 events. 1186/2028 cut-off events. For 50375/50379 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11320 event pairs, 268 based on Foata normal form. 8/2029 useless extension candidates. Maximal degree in co-relation 11001. Up to 1686 conditions per place. [2024-06-04 16:01:46,642 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 138 selfloop transitions, 32 changer transitions 0/187 dead transitions. [2024-06-04 16:01:46,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 187 transitions, 2043 flow [2024-06-04 16:01:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 16:01:46,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:01:46,649 INFO L175 Difference]: Start difference. First operand has 154 places, 164 transitions, 1521 flow. Second operand 6 states and 141 transitions. [2024-06-04 16:01:46,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 187 transitions, 2043 flow [2024-06-04 16:01:46,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 187 transitions, 1938 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:46,736 INFO L231 Difference]: Finished difference. Result has 154 places, 168 transitions, 1557 flow [2024-06-04 16:01:46,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1557, PETRI_PLACES=154, PETRI_TRANSITIONS=168} [2024-06-04 16:01:46,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-04 16:01:46,737 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 168 transitions, 1557 flow [2024-06-04 16:01:46,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:46,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:46,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:01:46,737 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:46,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1920820914, now seen corresponding path program 2 times [2024-06-04 16:01:46,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:46,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205401014] [2024-06-04 16:01:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:46,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:47,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:47,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205401014] [2024-06-04 16:01:47,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205401014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:47,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:47,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:47,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543066343] [2024-06-04 16:01:47,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:47,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:47,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:47,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:47,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 168 transitions, 1557 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:47,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:47,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:47,471 INFO L124 PetriNetUnfolderBase]: 1200/2050 cut-off events. [2024-06-04 16:01:47,471 INFO L125 PetriNetUnfolderBase]: For 53259/53263 co-relation queries the response was YES. [2024-06-04 16:01:47,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11274 conditions, 2050 events. 1200/2050 cut-off events. For 53259/53263 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11505 event pairs, 305 based on Foata normal form. 8/2051 useless extension candidates. Maximal degree in co-relation 11198. Up to 1768 conditions per place. [2024-06-04 16:01:47,487 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 137 selfloop transitions, 30 changer transitions 0/184 dead transitions. [2024-06-04 16:01:47,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 184 transitions, 1963 flow [2024-06-04 16:01:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:47,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-04 16:01:47,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-04 16:01:47,488 INFO L175 Difference]: Start difference. First operand has 154 places, 168 transitions, 1557 flow. Second operand 6 states and 136 transitions. [2024-06-04 16:01:47,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 184 transitions, 1963 flow [2024-06-04 16:01:47,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 184 transitions, 1887 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:47,580 INFO L231 Difference]: Finished difference. Result has 158 places, 170 transitions, 1589 flow [2024-06-04 16:01:47,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1589, PETRI_PLACES=158, PETRI_TRANSITIONS=170} [2024-06-04 16:01:47,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-04 16:01:47,580 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 170 transitions, 1589 flow [2024-06-04 16:01:47,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:47,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:47,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:01:47,581 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:47,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash 786208784, now seen corresponding path program 3 times [2024-06-04 16:01:47,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:47,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23177028] [2024-06-04 16:01:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:47,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:47,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23177028] [2024-06-04 16:01:47,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23177028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:47,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:47,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:47,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045760490] [2024-06-04 16:01:47,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:47,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:47,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:47,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:47,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:48,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:48,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 170 transitions, 1589 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:48,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:48,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:48,312 INFO L124 PetriNetUnfolderBase]: 1190/2036 cut-off events. [2024-06-04 16:01:48,312 INFO L125 PetriNetUnfolderBase]: For 53376/53380 co-relation queries the response was YES. [2024-06-04 16:01:48,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11088 conditions, 2036 events. 1190/2036 cut-off events. For 53376/53380 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11417 event pairs, 266 based on Foata normal form. 8/2037 useless extension candidates. Maximal degree in co-relation 11010. Up to 1726 conditions per place. [2024-06-04 16:01:48,328 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 142 selfloop transitions, 27 changer transitions 0/186 dead transitions. [2024-06-04 16:01:48,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 186 transitions, 1967 flow [2024-06-04 16:01:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-04 16:01:48,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-04 16:01:48,329 INFO L175 Difference]: Start difference. First operand has 158 places, 170 transitions, 1589 flow. Second operand 5 states and 122 transitions. [2024-06-04 16:01:48,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 186 transitions, 1967 flow [2024-06-04 16:01:48,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 186 transitions, 1869 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:48,409 INFO L231 Difference]: Finished difference. Result has 159 places, 170 transitions, 1555 flow [2024-06-04 16:01:48,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1555, PETRI_PLACES=159, PETRI_TRANSITIONS=170} [2024-06-04 16:01:48,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-04 16:01:48,410 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 170 transitions, 1555 flow [2024-06-04 16:01:48,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:48,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:48,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:01:48,411 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:48,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2104420354, now seen corresponding path program 1 times [2024-06-04 16:01:48,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:48,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690561020] [2024-06-04 16:01:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:48,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:48,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:48,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690561020] [2024-06-04 16:01:48,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690561020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:48,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:48,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:48,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138704831] [2024-06-04 16:01:48,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:48,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:48,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:48,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:48,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:48,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:48,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 170 transitions, 1555 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:01:48,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:48,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:48,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:49,251 INFO L124 PetriNetUnfolderBase]: 1317/2220 cut-off events. [2024-06-04 16:01:49,252 INFO L125 PetriNetUnfolderBase]: For 62711/62719 co-relation queries the response was YES. [2024-06-04 16:01:49,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12149 conditions, 2220 events. 1317/2220 cut-off events. For 62711/62719 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12401 event pairs, 246 based on Foata normal form. 14/2234 useless extension candidates. Maximal degree in co-relation 12070. Up to 1866 conditions per place. [2024-06-04 16:01:49,268 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 37 changer transitions 0/207 dead transitions. [2024-06-04 16:01:49,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 207 transitions, 2182 flow [2024-06-04 16:01:49,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-04 16:01:49,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-04 16:01:49,269 INFO L175 Difference]: Start difference. First operand has 159 places, 170 transitions, 1555 flow. Second operand 9 states and 195 transitions. [2024-06-04 16:01:49,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 207 transitions, 2182 flow [2024-06-04 16:01:49,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 207 transitions, 2120 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:49,369 INFO L231 Difference]: Finished difference. Result has 166 places, 175 transitions, 1637 flow [2024-06-04 16:01:49,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1637, PETRI_PLACES=166, PETRI_TRANSITIONS=175} [2024-06-04 16:01:49,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-04 16:01:49,370 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 175 transitions, 1637 flow [2024-06-04 16:01:49,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:01:49,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:49,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:49,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:01:49,370 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:49,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1277062914, now seen corresponding path program 2 times [2024-06-04 16:01:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:49,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085925720] [2024-06-04 16:01:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:49,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:49,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085925720] [2024-06-04 16:01:49,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085925720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:49,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:49,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487926122] [2024-06-04 16:01:49,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:49,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:49,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:49,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:49,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:49,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 175 transitions, 1637 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:49,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:49,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:49,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:50,196 INFO L124 PetriNetUnfolderBase]: 1345/2268 cut-off events. [2024-06-04 16:01:50,197 INFO L125 PetriNetUnfolderBase]: For 67831/67839 co-relation queries the response was YES. [2024-06-04 16:01:50,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12583 conditions, 2268 events. 1345/2268 cut-off events. For 67831/67839 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12763 event pairs, 327 based on Foata normal form. 16/2284 useless extension candidates. Maximal degree in co-relation 12501. Up to 2010 conditions per place. [2024-06-04 16:01:50,215 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 32 changer transitions 0/200 dead transitions. [2024-06-04 16:01:50,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 200 transitions, 2115 flow [2024-06-04 16:01:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-04 16:01:50,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-04 16:01:50,217 INFO L175 Difference]: Start difference. First operand has 166 places, 175 transitions, 1637 flow. Second operand 9 states and 188 transitions. [2024-06-04 16:01:50,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 200 transitions, 2115 flow [2024-06-04 16:01:50,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 200 transitions, 2068 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:50,344 INFO L231 Difference]: Finished difference. Result has 171 places, 176 transitions, 1672 flow [2024-06-04 16:01:50,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1672, PETRI_PLACES=171, PETRI_TRANSITIONS=176} [2024-06-04 16:01:50,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-04 16:01:50,344 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 176 transitions, 1672 flow [2024-06-04 16:01:50,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:50,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:50,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:01:50,345 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:50,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1018448514, now seen corresponding path program 3 times [2024-06-04 16:01:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:50,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582294822] [2024-06-04 16:01:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:50,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:50,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582294822] [2024-06-04 16:01:50,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582294822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:50,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:50,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:50,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469977616] [2024-06-04 16:01:50,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:50,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:50,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:50,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:50,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 176 transitions, 1672 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:50,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:50,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:51,126 INFO L124 PetriNetUnfolderBase]: 1373/2312 cut-off events. [2024-06-04 16:01:51,126 INFO L125 PetriNetUnfolderBase]: For 69808/69816 co-relation queries the response was YES. [2024-06-04 16:01:51,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12924 conditions, 2312 events. 1373/2312 cut-off events. For 69808/69816 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13019 event pairs, 325 based on Foata normal form. 14/2326 useless extension candidates. Maximal degree in co-relation 12840. Up to 2024 conditions per place. [2024-06-04 16:01:51,144 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 166 selfloop transitions, 35 changer transitions 0/207 dead transitions. [2024-06-04 16:01:51,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 207 transitions, 2204 flow [2024-06-04 16:01:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:01:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:01:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-04 16:01:51,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-04 16:01:51,145 INFO L175 Difference]: Start difference. First operand has 171 places, 176 transitions, 1672 flow. Second operand 10 states and 207 transitions. [2024-06-04 16:01:51,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 207 transitions, 2204 flow [2024-06-04 16:01:51,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 207 transitions, 2141 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:51,289 INFO L231 Difference]: Finished difference. Result has 175 places, 179 transitions, 1728 flow [2024-06-04 16:01:51,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1728, PETRI_PLACES=175, PETRI_TRANSITIONS=179} [2024-06-04 16:01:51,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 16:01:51,290 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 179 transitions, 1728 flow [2024-06-04 16:01:51,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:51,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:51,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:51,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:01:51,290 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:51,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1099577064, now seen corresponding path program 1 times [2024-06-04 16:01:51,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:51,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947456716] [2024-06-04 16:01:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:51,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:51,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:51,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947456716] [2024-06-04 16:01:51,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947456716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:51,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:51,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:51,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929697670] [2024-06-04 16:01:51,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:51,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:51,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:51,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:51,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:51,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 179 transitions, 1728 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:51,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:51,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:51,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:52,009 INFO L124 PetriNetUnfolderBase]: 1386/2341 cut-off events. [2024-06-04 16:01:52,009 INFO L125 PetriNetUnfolderBase]: For 70709/70717 co-relation queries the response was YES. [2024-06-04 16:01:52,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13247 conditions, 2341 events. 1386/2341 cut-off events. For 70709/70717 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13292 event pairs, 356 based on Foata normal form. 9/2349 useless extension candidates. Maximal degree in co-relation 13161. Up to 1969 conditions per place. [2024-06-04 16:01:52,030 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 153 selfloop transitions, 54 changer transitions 0/213 dead transitions. [2024-06-04 16:01:52,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 213 transitions, 2478 flow [2024-06-04 16:01:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:01:52,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-04 16:01:52,033 INFO L175 Difference]: Start difference. First operand has 175 places, 179 transitions, 1728 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:01:52,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 213 transitions, 2478 flow [2024-06-04 16:01:52,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 213 transitions, 2408 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:52,185 INFO L231 Difference]: Finished difference. Result has 175 places, 188 transitions, 1892 flow [2024-06-04 16:01:52,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1892, PETRI_PLACES=175, PETRI_TRANSITIONS=188} [2024-06-04 16:01:52,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 16:01:52,186 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 188 transitions, 1892 flow [2024-06-04 16:01:52,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:52,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:52,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:52,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:01:52,186 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:52,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:52,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1099697034, now seen corresponding path program 2 times [2024-06-04 16:01:52,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:52,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972046623] [2024-06-04 16:01:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:52,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:52,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:52,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972046623] [2024-06-04 16:01:52,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972046623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:52,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:52,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:52,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573385270] [2024-06-04 16:01:52,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:52,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:52,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:52,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:52,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:52,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:52,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 188 transitions, 1892 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:52,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:52,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:52,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:52,944 INFO L124 PetriNetUnfolderBase]: 1396/2358 cut-off events. [2024-06-04 16:01:52,944 INFO L125 PetriNetUnfolderBase]: For 75059/75071 co-relation queries the response was YES. [2024-06-04 16:01:52,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13683 conditions, 2358 events. 1396/2358 cut-off events. For 75059/75071 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13418 event pairs, 344 based on Foata normal form. 13/2371 useless extension candidates. Maximal degree in co-relation 13596. Up to 2064 conditions per place. [2024-06-04 16:01:52,963 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 38 changer transitions 0/214 dead transitions. [2024-06-04 16:01:52,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 214 transitions, 2431 flow [2024-06-04 16:01:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:52,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-04 16:01:52,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-04 16:01:52,965 INFO L175 Difference]: Start difference. First operand has 175 places, 188 transitions, 1892 flow. Second operand 7 states and 157 transitions. [2024-06-04 16:01:52,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 214 transitions, 2431 flow [2024-06-04 16:01:53,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 214 transitions, 2326 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:53,149 INFO L231 Difference]: Finished difference. Result has 180 places, 194 transitions, 1948 flow [2024-06-04 16:01:53,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1948, PETRI_PLACES=180, PETRI_TRANSITIONS=194} [2024-06-04 16:01:53,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-04 16:01:53,149 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 194 transitions, 1948 flow [2024-06-04 16:01:53,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:53,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:53,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:53,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:01:53,150 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:53,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:53,151 INFO L85 PathProgramCache]: Analyzing trace with hash -198973430, now seen corresponding path program 1 times [2024-06-04 16:01:53,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:53,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721777820] [2024-06-04 16:01:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:53,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:53,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:53,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721777820] [2024-06-04 16:01:53,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721777820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:53,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:53,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:53,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667866675] [2024-06-04 16:01:53,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:53,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:53,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:53,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:53,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:53,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:53,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 194 transitions, 1948 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:53,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:53,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:53,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:53,998 INFO L124 PetriNetUnfolderBase]: 1417/2393 cut-off events. [2024-06-04 16:01:53,999 INFO L125 PetriNetUnfolderBase]: For 80441/80453 co-relation queries the response was YES. [2024-06-04 16:01:54,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14104 conditions, 2393 events. 1417/2393 cut-off events. For 80441/80453 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13654 event pairs, 343 based on Foata normal form. 13/2406 useless extension candidates. Maximal degree in co-relation 14015. Up to 2052 conditions per place. [2024-06-04 16:01:54,019 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 63 changer transitions 0/228 dead transitions. [2024-06-04 16:01:54,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 228 transitions, 2758 flow [2024-06-04 16:01:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:01:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:01:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-04 16:01:54,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-04 16:01:54,021 INFO L175 Difference]: Start difference. First operand has 180 places, 194 transitions, 1948 flow. Second operand 10 states and 213 transitions. [2024-06-04 16:01:54,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 228 transitions, 2758 flow [2024-06-04 16:01:54,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 228 transitions, 2668 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:54,175 INFO L231 Difference]: Finished difference. Result has 186 places, 203 transitions, 2134 flow [2024-06-04 16:01:54,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2134, PETRI_PLACES=186, PETRI_TRANSITIONS=203} [2024-06-04 16:01:54,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-04 16:01:54,175 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 203 transitions, 2134 flow [2024-06-04 16:01:54,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:54,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:54,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:54,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:01:54,176 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:54,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1276828554, now seen corresponding path program 3 times [2024-06-04 16:01:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:54,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554569011] [2024-06-04 16:01:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:54,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:54,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554569011] [2024-06-04 16:01:54,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554569011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:54,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:54,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:54,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082923525] [2024-06-04 16:01:54,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:54,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:54,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:54,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:54,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 203 transitions, 2134 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:54,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:54,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:54,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:55,015 INFO L124 PetriNetUnfolderBase]: 1440/2429 cut-off events. [2024-06-04 16:01:55,015 INFO L125 PetriNetUnfolderBase]: For 86037/86049 co-relation queries the response was YES. [2024-06-04 16:01:55,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14686 conditions, 2429 events. 1440/2429 cut-off events. For 86037/86049 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 13885 event pairs, 343 based on Foata normal form. 13/2442 useless extension candidates. Maximal degree in co-relation 14596. Up to 2116 conditions per place. [2024-06-04 16:01:55,048 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 50 changer transitions 0/234 dead transitions. [2024-06-04 16:01:55,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 234 transitions, 2861 flow [2024-06-04 16:01:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 16:01:55,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:01:55,049 INFO L175 Difference]: Start difference. First operand has 186 places, 203 transitions, 2134 flow. Second operand 8 states and 172 transitions. [2024-06-04 16:01:55,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 234 transitions, 2861 flow [2024-06-04 16:01:55,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 234 transitions, 2730 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:55,224 INFO L231 Difference]: Finished difference. Result has 190 places, 215 transitions, 2268 flow [2024-06-04 16:01:55,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2268, PETRI_PLACES=190, PETRI_TRANSITIONS=215} [2024-06-04 16:01:55,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-04 16:01:55,225 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 215 transitions, 2268 flow [2024-06-04 16:01:55,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:55,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:55,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:55,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:01:55,225 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:55,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1275876598, now seen corresponding path program 2 times [2024-06-04 16:01:55,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:55,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810268989] [2024-06-04 16:01:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:55,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:55,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810268989] [2024-06-04 16:01:55,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810268989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:55,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:55,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:55,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836625580] [2024-06-04 16:01:55,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:55,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:55,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:55,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:55,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 215 transitions, 2268 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:55,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:55,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:55,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:56,036 INFO L124 PetriNetUnfolderBase]: 1461/2464 cut-off events. [2024-06-04 16:01:56,037 INFO L125 PetriNetUnfolderBase]: For 91692/91704 co-relation queries the response was YES. [2024-06-04 16:01:56,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15104 conditions, 2464 events. 1461/2464 cut-off events. For 91692/91704 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14168 event pairs, 343 based on Foata normal form. 13/2477 useless extension candidates. Maximal degree in co-relation 15011. Up to 2102 conditions per place. [2024-06-04 16:01:56,061 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 75 changer transitions 0/245 dead transitions. [2024-06-04 16:01:56,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 245 transitions, 3084 flow [2024-06-04 16:01:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-04 16:01:56,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-04 16:01:56,062 INFO L175 Difference]: Start difference. First operand has 190 places, 215 transitions, 2268 flow. Second operand 9 states and 194 transitions. [2024-06-04 16:01:56,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 245 transitions, 3084 flow [2024-06-04 16:01:56,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 245 transitions, 2990 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:56,225 INFO L231 Difference]: Finished difference. Result has 197 places, 224 transitions, 2442 flow [2024-06-04 16:01:56,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2442, PETRI_PLACES=197, PETRI_TRANSITIONS=224} [2024-06-04 16:01:56,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-04 16:01:56,225 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 224 transitions, 2442 flow [2024-06-04 16:01:56,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:56,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:56,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:56,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:01:56,226 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:56,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:56,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1276828740, now seen corresponding path program 3 times [2024-06-04 16:01:56,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:56,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437230258] [2024-06-04 16:01:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:56,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:56,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:56,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437230258] [2024-06-04 16:01:56,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437230258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:56,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:56,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:56,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316683674] [2024-06-04 16:01:56,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:56,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:56,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:56,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:56,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:56,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 224 transitions, 2442 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:56,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:56,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:56,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:57,077 INFO L124 PetriNetUnfolderBase]: 1458/2460 cut-off events. [2024-06-04 16:01:57,078 INFO L125 PetriNetUnfolderBase]: For 94715/94727 co-relation queries the response was YES. [2024-06-04 16:01:57,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15166 conditions, 2460 events. 1458/2460 cut-off events. For 94715/94727 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14114 event pairs, 343 based on Foata normal form. 13/2473 useless extension candidates. Maximal degree in co-relation 15072. Up to 2099 conditions per place. [2024-06-04 16:01:57,100 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 76 changer transitions 0/247 dead transitions. [2024-06-04 16:01:57,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 247 transitions, 3158 flow [2024-06-04 16:01:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:01:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:01:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-04 16:01:57,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055432372505543 [2024-06-04 16:01:57,102 INFO L175 Difference]: Start difference. First operand has 197 places, 224 transitions, 2442 flow. Second operand 11 states and 228 transitions. [2024-06-04 16:01:57,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 247 transitions, 3158 flow [2024-06-04 16:01:57,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 247 transitions, 3019 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:57,312 INFO L231 Difference]: Finished difference. Result has 203 places, 224 transitions, 2461 flow [2024-06-04 16:01:57,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2461, PETRI_PLACES=203, PETRI_TRANSITIONS=224} [2024-06-04 16:01:57,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-04 16:01:57,312 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 224 transitions, 2461 flow [2024-06-04 16:01:57,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:57,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:57,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:57,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:01:57,313 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:57,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:57,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1401647106, now seen corresponding path program 4 times [2024-06-04 16:01:57,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:57,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096563427] [2024-06-04 16:01:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:57,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:57,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:57,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096563427] [2024-06-04 16:01:57,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096563427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:57,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:57,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:57,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068800599] [2024-06-04 16:01:57,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:57,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:57,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:57,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:57,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:57,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:57,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 224 transitions, 2461 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:57,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:57,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:57,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:58,140 INFO L124 PetriNetUnfolderBase]: 1486/2500 cut-off events. [2024-06-04 16:01:58,140 INFO L125 PetriNetUnfolderBase]: For 105982/105990 co-relation queries the response was YES. [2024-06-04 16:01:58,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15486 conditions, 2500 events. 1486/2500 cut-off events. For 105982/105990 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14309 event pairs, 333 based on Foata normal form. 16/2516 useless extension candidates. Maximal degree in co-relation 15391. Up to 2184 conditions per place. [2024-06-04 16:01:58,160 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 210 selfloop transitions, 32 changer transitions 0/248 dead transitions. [2024-06-04 16:01:58,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 248 transitions, 3041 flow [2024-06-04 16:01:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-04 16:01:58,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-04 16:01:58,161 INFO L175 Difference]: Start difference. First operand has 203 places, 224 transitions, 2461 flow. Second operand 8 states and 171 transitions. [2024-06-04 16:01:58,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 248 transitions, 3041 flow [2024-06-04 16:01:58,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 248 transitions, 2865 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 16:01:58,392 INFO L231 Difference]: Finished difference. Result has 202 places, 225 transitions, 2372 flow [2024-06-04 16:01:58,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2372, PETRI_PLACES=202, PETRI_TRANSITIONS=225} [2024-06-04 16:01:58,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-04 16:01:58,393 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 225 transitions, 2372 flow [2024-06-04 16:01:58,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:58,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:58,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:58,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:01:58,393 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:58,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:58,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1412371866, now seen corresponding path program 5 times [2024-06-04 16:01:58,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:58,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440287141] [2024-06-04 16:01:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:58,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:58,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:58,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440287141] [2024-06-04 16:01:58,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440287141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:58,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:58,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:58,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766034319] [2024-06-04 16:01:58,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:58,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:58,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:58,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:58,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 225 transitions, 2372 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:58,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:58,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:58,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:59,168 INFO L124 PetriNetUnfolderBase]: 1501/2526 cut-off events. [2024-06-04 16:01:59,169 INFO L125 PetriNetUnfolderBase]: For 108049/108049 co-relation queries the response was YES. [2024-06-04 16:01:59,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15562 conditions, 2526 events. 1501/2526 cut-off events. For 108049/108049 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14506 event pairs, 347 based on Foata normal form. 8/2533 useless extension candidates. Maximal degree in co-relation 15466. Up to 2241 conditions per place. [2024-06-04 16:01:59,191 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 29 changer transitions 0/241 dead transitions. [2024-06-04 16:01:59,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 241 transitions, 2920 flow [2024-06-04 16:01:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:59,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-04 16:01:59,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:01:59,192 INFO L175 Difference]: Start difference. First operand has 202 places, 225 transitions, 2372 flow. Second operand 6 states and 132 transitions. [2024-06-04 16:01:59,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 241 transitions, 2920 flow [2024-06-04 16:01:59,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 241 transitions, 2852 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:59,478 INFO L231 Difference]: Finished difference. Result has 202 places, 226 transitions, 2384 flow [2024-06-04 16:01:59,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2306, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2384, PETRI_PLACES=202, PETRI_TRANSITIONS=226} [2024-06-04 16:01:59,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-04 16:01:59,479 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 226 transitions, 2384 flow [2024-06-04 16:01:59,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:59,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:59,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:59,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:01:59,479 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:59,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1401320676, now seen corresponding path program 6 times [2024-06-04 16:01:59,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:59,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230392424] [2024-06-04 16:01:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:59,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:59,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:59,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230392424] [2024-06-04 16:01:59,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230392424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:59,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:59,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:59,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312185967] [2024-06-04 16:01:59,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:59,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:59,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:59,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:59,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:59,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:59,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 226 transitions, 2384 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:59,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:59,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:59,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:00,348 INFO L124 PetriNetUnfolderBase]: 1488/2510 cut-off events. [2024-06-04 16:02:00,349 INFO L125 PetriNetUnfolderBase]: For 98891/98899 co-relation queries the response was YES. [2024-06-04 16:02:00,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15142 conditions, 2510 events. 1488/2510 cut-off events. For 98891/98899 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14432 event pairs, 246 based on Foata normal form. 14/2524 useless extension candidates. Maximal degree in co-relation 15045. Up to 2036 conditions per place. [2024-06-04 16:02:00,371 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 43 changer transitions 0/255 dead transitions. [2024-06-04 16:02:00,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 255 transitions, 2991 flow [2024-06-04 16:02:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-04 16:02:00,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-04 16:02:00,373 INFO L175 Difference]: Start difference. First operand has 202 places, 226 transitions, 2384 flow. Second operand 8 states and 177 transitions. [2024-06-04 16:02:00,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 255 transitions, 2991 flow [2024-06-04 16:02:00,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 255 transitions, 2926 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:00,632 INFO L231 Difference]: Finished difference. Result has 206 places, 226 transitions, 2413 flow [2024-06-04 16:02:00,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2413, PETRI_PLACES=206, PETRI_TRANSITIONS=226} [2024-06-04 16:02:00,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-04 16:02:00,633 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 226 transitions, 2413 flow [2024-06-04 16:02:00,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:00,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:00,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:00,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:02:00,633 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:00,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash -55203056, now seen corresponding path program 4 times [2024-06-04 16:02:00,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:00,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842938355] [2024-06-04 16:02:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:00,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:01,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842938355] [2024-06-04 16:02:01,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842938355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:01,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:01,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:01,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883034380] [2024-06-04 16:02:01,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:01,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:01,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:01,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:01,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:01,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:01,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 226 transitions, 2413 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:01,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:01,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:01,440 INFO L124 PetriNetUnfolderBase]: 1501/2532 cut-off events. [2024-06-04 16:02:01,440 INFO L125 PetriNetUnfolderBase]: For 98966/98978 co-relation queries the response was YES. [2024-06-04 16:02:01,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15492 conditions, 2532 events. 1501/2532 cut-off events. For 98966/98978 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14632 event pairs, 345 based on Foata normal form. 13/2545 useless extension candidates. Maximal degree in co-relation 15394. Up to 2161 conditions per place. [2024-06-04 16:02:01,464 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 59 changer transitions 0/261 dead transitions. [2024-06-04 16:02:01,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 261 transitions, 3271 flow [2024-06-04 16:02:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:02:01,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-04 16:02:01,466 INFO L175 Difference]: Start difference. First operand has 206 places, 226 transitions, 2413 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:02:01,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 261 transitions, 3271 flow [2024-06-04 16:02:01,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 261 transitions, 3171 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:01,706 INFO L231 Difference]: Finished difference. Result has 207 places, 232 transitions, 2529 flow [2024-06-04 16:02:01,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2529, PETRI_PLACES=207, PETRI_TRANSITIONS=232} [2024-06-04 16:02:01,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-04 16:02:01,707 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 232 transitions, 2529 flow [2024-06-04 16:02:01,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:01,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:01,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:02:01,707 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:01,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 457335230, now seen corresponding path program 5 times [2024-06-04 16:02:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:01,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308145967] [2024-06-04 16:02:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:02,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:02,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308145967] [2024-06-04 16:02:02,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308145967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:02,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:02,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:02,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640675355] [2024-06-04 16:02:02,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:02,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:02,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:02,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:02,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 232 transitions, 2529 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:02,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:02,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:02,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:02,535 INFO L124 PetriNetUnfolderBase]: 1514/2554 cut-off events. [2024-06-04 16:02:02,536 INFO L125 PetriNetUnfolderBase]: For 96568/96580 co-relation queries the response was YES. [2024-06-04 16:02:02,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15553 conditions, 2554 events. 1514/2554 cut-off events. For 96568/96580 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14815 event pairs, 345 based on Foata normal form. 13/2567 useless extension candidates. Maximal degree in co-relation 15455. Up to 2176 conditions per place. [2024-06-04 16:02:02,565 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 191 selfloop transitions, 68 changer transitions 0/265 dead transitions. [2024-06-04 16:02:02,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 265 transitions, 3397 flow [2024-06-04 16:02:02,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:02:02,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-04 16:02:02,566 INFO L175 Difference]: Start difference. First operand has 207 places, 232 transitions, 2529 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:02:02,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 265 transitions, 3397 flow [2024-06-04 16:02:02,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 265 transitions, 3181 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:02,817 INFO L231 Difference]: Finished difference. Result has 211 places, 238 transitions, 2551 flow [2024-06-04 16:02:02,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2551, PETRI_PLACES=211, PETRI_TRANSITIONS=238} [2024-06-04 16:02:02,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-04 16:02:02,817 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 238 transitions, 2551 flow [2024-06-04 16:02:02,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:02,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:02,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:02,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:02:02,818 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:02,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:02,819 INFO L85 PathProgramCache]: Analyzing trace with hash -854065210, now seen corresponding path program 6 times [2024-06-04 16:02:02,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:02,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738589493] [2024-06-04 16:02:02,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:02,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:03,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:03,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738589493] [2024-06-04 16:02:03,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738589493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:03,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:03,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:03,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705077911] [2024-06-04 16:02:03,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:03,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:03,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:03,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:03,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:03,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 238 transitions, 2551 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:03,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:03,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:03,667 INFO L124 PetriNetUnfolderBase]: 1511/2549 cut-off events. [2024-06-04 16:02:03,668 INFO L125 PetriNetUnfolderBase]: For 98353/98361 co-relation queries the response was YES. [2024-06-04 16:02:03,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15474 conditions, 2549 events. 1511/2549 cut-off events. For 98353/98361 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14756 event pairs, 357 based on Foata normal form. 9/2557 useless extension candidates. Maximal degree in co-relation 15375. Up to 2173 conditions per place. [2024-06-04 16:02:03,689 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 61 changer transitions 0/259 dead transitions. [2024-06-04 16:02:03,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 259 transitions, 3301 flow [2024-06-04 16:02:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 16:02:03,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:02:03,690 INFO L175 Difference]: Start difference. First operand has 211 places, 238 transitions, 2551 flow. Second operand 6 states and 144 transitions. [2024-06-04 16:02:03,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 259 transitions, 3301 flow [2024-06-04 16:02:03,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 259 transitions, 3159 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:03,935 INFO L231 Difference]: Finished difference. Result has 212 places, 238 transitions, 2537 flow [2024-06-04 16:02:03,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2537, PETRI_PLACES=212, PETRI_TRANSITIONS=238} [2024-06-04 16:02:03,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-04 16:02:03,936 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 238 transitions, 2537 flow [2024-06-04 16:02:03,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:03,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:03,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:02:03,936 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:03,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:03,937 INFO L85 PathProgramCache]: Analyzing trace with hash -853945240, now seen corresponding path program 7 times [2024-06-04 16:02:03,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:03,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144060426] [2024-06-04 16:02:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:03,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:04,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:04,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144060426] [2024-06-04 16:02:04,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144060426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:04,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:04,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:04,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551827615] [2024-06-04 16:02:04,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:04,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:04,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:04,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:04,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:04,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 238 transitions, 2537 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:04,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:04,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:04,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:04,816 INFO L124 PetriNetUnfolderBase]: 1508/2546 cut-off events. [2024-06-04 16:02:04,816 INFO L125 PetriNetUnfolderBase]: For 100826/100838 co-relation queries the response was YES. [2024-06-04 16:02:04,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15450 conditions, 2546 events. 1508/2546 cut-off events. For 100826/100838 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14748 event pairs, 345 based on Foata normal form. 13/2559 useless extension candidates. Maximal degree in co-relation 15350. Up to 2244 conditions per place. [2024-06-04 16:02:04,842 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 214 selfloop transitions, 34 changer transitions 0/254 dead transitions. [2024-06-04 16:02:04,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 254 transitions, 3073 flow [2024-06-04 16:02:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 16:02:04,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-04 16:02:04,843 INFO L175 Difference]: Start difference. First operand has 212 places, 238 transitions, 2537 flow. Second operand 6 states and 137 transitions. [2024-06-04 16:02:04,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 254 transitions, 3073 flow [2024-06-04 16:02:05,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 254 transitions, 2933 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:05,088 INFO L231 Difference]: Finished difference. Result has 213 places, 238 transitions, 2471 flow [2024-06-04 16:02:05,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2471, PETRI_PLACES=213, PETRI_TRANSITIONS=238} [2024-06-04 16:02:05,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-04 16:02:05,089 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 238 transitions, 2471 flow [2024-06-04 16:02:05,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:05,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:05,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:02:05,090 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:05,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash -848403928, now seen corresponding path program 1 times [2024-06-04 16:02:05,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:05,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67740766] [2024-06-04 16:02:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:05,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:05,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:05,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67740766] [2024-06-04 16:02:05,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67740766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:05,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:05,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:05,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154992492] [2024-06-04 16:02:05,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:05,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:05,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:05,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:05,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:05,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 238 transitions, 2471 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:05,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:05,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:05,902 INFO L124 PetriNetUnfolderBase]: 1521/2568 cut-off events. [2024-06-04 16:02:05,903 INFO L125 PetriNetUnfolderBase]: For 105757/105769 co-relation queries the response was YES. [2024-06-04 16:02:05,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15638 conditions, 2568 events. 1521/2568 cut-off events. For 105757/105769 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14904 event pairs, 344 based on Foata normal form. 13/2581 useless extension candidates. Maximal degree in co-relation 15537. Up to 2228 conditions per place. [2024-06-04 16:02:05,927 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 201 selfloop transitions, 53 changer transitions 0/260 dead transitions. [2024-06-04 16:02:05,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 260 transitions, 3213 flow [2024-06-04 16:02:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-04 16:02:05,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-04 16:02:05,928 INFO L175 Difference]: Start difference. First operand has 213 places, 238 transitions, 2471 flow. Second operand 8 states and 173 transitions. [2024-06-04 16:02:05,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 260 transitions, 3213 flow [2024-06-04 16:02:06,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 260 transitions, 3133 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:06,192 INFO L231 Difference]: Finished difference. Result has 216 places, 244 transitions, 2609 flow [2024-06-04 16:02:06,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2609, PETRI_PLACES=216, PETRI_TRANSITIONS=244} [2024-06-04 16:02:06,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-04 16:02:06,193 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 244 transitions, 2609 flow [2024-06-04 16:02:06,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:06,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:06,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:06,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:02:06,193 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:06,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash -853945054, now seen corresponding path program 4 times [2024-06-04 16:02:06,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:06,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164570445] [2024-06-04 16:02:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:06,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:06,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:06,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164570445] [2024-06-04 16:02:06,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164570445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:06,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:06,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:06,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889805951] [2024-06-04 16:02:06,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:06,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:06,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:06,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:06,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 244 transitions, 2609 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:06,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:06,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:06,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:06,996 INFO L124 PetriNetUnfolderBase]: 1518/2562 cut-off events. [2024-06-04 16:02:06,996 INFO L125 PetriNetUnfolderBase]: For 109289/109301 co-relation queries the response was YES. [2024-06-04 16:02:07,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15896 conditions, 2562 events. 1518/2562 cut-off events. For 109289/109301 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14856 event pairs, 344 based on Foata normal form. 13/2575 useless extension candidates. Maximal degree in co-relation 15794. Up to 2227 conditions per place. [2024-06-04 16:02:07,020 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 202 selfloop transitions, 54 changer transitions 0/262 dead transitions. [2024-06-04 16:02:07,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 262 transitions, 3267 flow [2024-06-04 16:02:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 16:02:07,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-04 16:02:07,021 INFO L175 Difference]: Start difference. First operand has 216 places, 244 transitions, 2609 flow. Second operand 7 states and 159 transitions. [2024-06-04 16:02:07,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 262 transitions, 3267 flow [2024-06-04 16:02:07,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 262 transitions, 3135 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:07,284 INFO L231 Difference]: Finished difference. Result has 218 places, 244 transitions, 2597 flow [2024-06-04 16:02:07,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2597, PETRI_PLACES=218, PETRI_TRANSITIONS=244} [2024-06-04 16:02:07,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-04 16:02:07,285 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 244 transitions, 2597 flow [2024-06-04 16:02:07,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:07,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:07,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:07,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:02:07,286 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:07,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:07,286 INFO L85 PathProgramCache]: Analyzing trace with hash 500384372, now seen corresponding path program 2 times [2024-06-04 16:02:07,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:07,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707032231] [2024-06-04 16:02:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:07,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:07,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707032231] [2024-06-04 16:02:07,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707032231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:07,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:07,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:07,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640184421] [2024-06-04 16:02:07,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:07,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:07,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:07,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:07,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:07,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 244 transitions, 2597 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:07,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:07,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:07,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:08,080 INFO L124 PetriNetUnfolderBase]: 1547/2609 cut-off events. [2024-06-04 16:02:08,080 INFO L125 PetriNetUnfolderBase]: For 111097/111109 co-relation queries the response was YES. [2024-06-04 16:02:08,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16296 conditions, 2609 events. 1547/2609 cut-off events. For 111097/111109 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15146 event pairs, 344 based on Foata normal form. 13/2622 useless extension candidates. Maximal degree in co-relation 16193. Up to 2285 conditions per place. [2024-06-04 16:02:08,103 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 219 selfloop transitions, 46 changer transitions 0/271 dead transitions. [2024-06-04 16:02:08,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 271 transitions, 3422 flow [2024-06-04 16:02:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-04 16:02:08,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-04 16:02:08,105 INFO L175 Difference]: Start difference. First operand has 218 places, 244 transitions, 2597 flow. Second operand 7 states and 155 transitions. [2024-06-04 16:02:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 271 transitions, 3422 flow [2024-06-04 16:02:08,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 271 transitions, 3335 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:08,382 INFO L231 Difference]: Finished difference. Result has 221 places, 256 transitions, 2802 flow [2024-06-04 16:02:08,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2802, PETRI_PLACES=221, PETRI_TRANSITIONS=256} [2024-06-04 16:02:08,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-04 16:02:08,382 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 256 transitions, 2802 flow [2024-06-04 16:02:08,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:08,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:08,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:08,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:02:08,383 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:08,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:08,384 INFO L85 PathProgramCache]: Analyzing trace with hash 500372840, now seen corresponding path program 8 times [2024-06-04 16:02:08,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:08,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021110551] [2024-06-04 16:02:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:08,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:08,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:08,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021110551] [2024-06-04 16:02:08,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021110551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:08,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:08,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:08,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126333102] [2024-06-04 16:02:08,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:08,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:08,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:08,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:08,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:08,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:08,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 256 transitions, 2802 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:08,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:08,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:08,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:09,248 INFO L124 PetriNetUnfolderBase]: 1544/2605 cut-off events. [2024-06-04 16:02:09,248 INFO L125 PetriNetUnfolderBase]: For 113893/113907 co-relation queries the response was YES. [2024-06-04 16:02:09,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16377 conditions, 2605 events. 1544/2605 cut-off events. For 113893/113907 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15151 event pairs, 344 based on Foata normal form. 15/2620 useless extension candidates. Maximal degree in co-relation 16272. Up to 2227 conditions per place. [2024-06-04 16:02:09,275 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 217 selfloop transitions, 60 changer transitions 0/283 dead transitions. [2024-06-04 16:02:09,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 283 transitions, 3528 flow [2024-06-04 16:02:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:02:09,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 16:02:09,277 INFO L175 Difference]: Start difference. First operand has 221 places, 256 transitions, 2802 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:02:09,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 283 transitions, 3528 flow [2024-06-04 16:02:09,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 283 transitions, 3457 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:09,583 INFO L231 Difference]: Finished difference. Result has 225 places, 256 transitions, 2867 flow [2024-06-04 16:02:09,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2733, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2867, PETRI_PLACES=225, PETRI_TRANSITIONS=256} [2024-06-04 16:02:09,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-04 16:02:09,583 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 256 transitions, 2867 flow [2024-06-04 16:02:09,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:09,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:09,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:09,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:02:09,584 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:09,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:09,584 INFO L85 PathProgramCache]: Analyzing trace with hash 500384186, now seen corresponding path program 5 times [2024-06-04 16:02:09,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:09,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475485979] [2024-06-04 16:02:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:09,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:10,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:10,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475485979] [2024-06-04 16:02:10,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475485979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:10,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:10,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:10,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933450828] [2024-06-04 16:02:10,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:10,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:10,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:10,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:10,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 256 transitions, 2867 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:10,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:10,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:10,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:10,485 INFO L124 PetriNetUnfolderBase]: 1549/2614 cut-off events. [2024-06-04 16:02:10,485 INFO L125 PetriNetUnfolderBase]: For 114350/114364 co-relation queries the response was YES. [2024-06-04 16:02:10,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16580 conditions, 2614 events. 1549/2614 cut-off events. For 114350/114364 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 15194 event pairs, 344 based on Foata normal form. 15/2629 useless extension candidates. Maximal degree in co-relation 16474. Up to 2270 conditions per place. [2024-06-04 16:02:10,511 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 214 selfloop transitions, 57 changer transitions 0/277 dead transitions. [2024-06-04 16:02:10,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 277 transitions, 3603 flow [2024-06-04 16:02:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-04 16:02:10,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-04 16:02:10,513 INFO L175 Difference]: Start difference. First operand has 225 places, 256 transitions, 2867 flow. Second operand 7 states and 158 transitions. [2024-06-04 16:02:10,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 277 transitions, 3603 flow [2024-06-04 16:02:10,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 277 transitions, 3441 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:02:10,843 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 2879 flow [2024-06-04 16:02:10,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2879, PETRI_PLACES=223, PETRI_TRANSITIONS=259} [2024-06-04 16:02:10,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-04 16:02:10,844 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 2879 flow [2024-06-04 16:02:10,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:10,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:10,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:10,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:02:10,845 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:10,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:10,845 INFO L85 PathProgramCache]: Analyzing trace with hash 500378792, now seen corresponding path program 3 times [2024-06-04 16:02:10,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:10,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537519749] [2024-06-04 16:02:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:10,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:11,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537519749] [2024-06-04 16:02:11,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537519749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:11,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:11,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:11,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50257502] [2024-06-04 16:02:11,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:11,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:11,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:11,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:11,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:11,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 2879 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:11,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:11,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:11,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:11,668 INFO L124 PetriNetUnfolderBase]: 1546/2608 cut-off events. [2024-06-04 16:02:11,668 INFO L125 PetriNetUnfolderBase]: For 108964/108978 co-relation queries the response was YES. [2024-06-04 16:02:11,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16359 conditions, 2608 events. 1546/2608 cut-off events. For 108964/108978 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15142 event pairs, 344 based on Foata normal form. 15/2623 useless extension candidates. Maximal degree in co-relation 16254. Up to 2285 conditions per place. [2024-06-04 16:02:11,693 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 220 selfloop transitions, 46 changer transitions 0/272 dead transitions. [2024-06-04 16:02:11,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 272 transitions, 3443 flow [2024-06-04 16:02:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 16:02:11,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-04 16:02:11,694 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 2879 flow. Second operand 6 states and 137 transitions. [2024-06-04 16:02:11,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 272 transitions, 3443 flow [2024-06-04 16:02:12,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 272 transitions, 3275 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:12,018 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 2813 flow [2024-06-04 16:02:12,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2711, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2813, PETRI_PLACES=223, PETRI_TRANSITIONS=259} [2024-06-04 16:02:12,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-04 16:02:12,019 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 2813 flow [2024-06-04 16:02:12,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:12,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:12,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:12,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:02:12,019 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:12,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:12,020 INFO L85 PathProgramCache]: Analyzing trace with hash 500378420, now seen corresponding path program 9 times [2024-06-04 16:02:12,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:12,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402768645] [2024-06-04 16:02:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:12,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:12,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:12,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402768645] [2024-06-04 16:02:12,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402768645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:12,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:12,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:12,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886310875] [2024-06-04 16:02:12,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:12,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:12,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:12,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:12,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:12,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 2813 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:12,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:12,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:12,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:12,890 INFO L124 PetriNetUnfolderBase]: 1543/2606 cut-off events. [2024-06-04 16:02:12,890 INFO L125 PetriNetUnfolderBase]: For 107316/107330 co-relation queries the response was YES. [2024-06-04 16:02:12,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16223 conditions, 2606 events. 1543/2606 cut-off events. For 107316/107330 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 15178 event pairs, 344 based on Foata normal form. 15/2621 useless extension candidates. Maximal degree in co-relation 16118. Up to 2227 conditions per place. [2024-06-04 16:02:12,914 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 60 changer transitions 0/281 dead transitions. [2024-06-04 16:02:12,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 281 transitions, 3419 flow [2024-06-04 16:02:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:12,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:02:12,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:02:12,915 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 2813 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:02:12,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 281 transitions, 3419 flow [2024-06-04 16:02:13,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 281 transitions, 3309 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:13,217 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 2835 flow [2024-06-04 16:02:13,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2835, PETRI_PLACES=223, PETRI_TRANSITIONS=259} [2024-06-04 16:02:13,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-04 16:02:13,217 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 2835 flow [2024-06-04 16:02:13,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:13,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:13,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:13,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:02:13,218 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:13,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:13,218 INFO L85 PathProgramCache]: Analyzing trace with hash 500373026, now seen corresponding path program 6 times [2024-06-04 16:02:13,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:13,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558729892] [2024-06-04 16:02:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:13,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:13,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:13,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558729892] [2024-06-04 16:02:13,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558729892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:13,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:13,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:13,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776465930] [2024-06-04 16:02:13,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:13,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:13,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:13,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:13,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:13,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:13,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 2835 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:13,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:13,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:13,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:14,018 INFO L124 PetriNetUnfolderBase]: 1540/2600 cut-off events. [2024-06-04 16:02:14,019 INFO L125 PetriNetUnfolderBase]: For 106383/106397 co-relation queries the response was YES. [2024-06-04 16:02:14,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16201 conditions, 2600 events. 1540/2600 cut-off events. For 106383/106397 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15109 event pairs, 344 based on Foata normal form. 15/2615 useless extension candidates. Maximal degree in co-relation 16096. Up to 2259 conditions per place. [2024-06-04 16:02:14,044 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 57 changer transitions 0/275 dead transitions. [2024-06-04 16:02:14,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 275 transitions, 3413 flow [2024-06-04 16:02:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-04 16:02:14,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:02:14,045 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 2835 flow. Second operand 6 states and 140 transitions. [2024-06-04 16:02:14,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 275 transitions, 3413 flow [2024-06-04 16:02:14,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 275 transitions, 3262 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:14,343 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 2816 flow [2024-06-04 16:02:14,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2816, PETRI_PLACES=223, PETRI_TRANSITIONS=259} [2024-06-04 16:02:14,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-04 16:02:14,344 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 2816 flow [2024-06-04 16:02:14,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:14,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:14,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:14,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:02:14,344 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:14,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:14,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1412374842, now seen corresponding path program 7 times [2024-06-04 16:02:14,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:14,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446089061] [2024-06-04 16:02:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:14,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:14,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:14,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446089061] [2024-06-04 16:02:14,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446089061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:14,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:14,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:14,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574854347] [2024-06-04 16:02:14,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:14,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:14,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:14,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:14,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:14,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:14,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 2816 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:14,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:14,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:14,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:15,325 INFO L124 PetriNetUnfolderBase]: 1545/2605 cut-off events. [2024-06-04 16:02:15,325 INFO L125 PetriNetUnfolderBase]: For 106472/106478 co-relation queries the response was YES. [2024-06-04 16:02:15,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16198 conditions, 2605 events. 1545/2605 cut-off events. For 106472/106478 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 15110 event pairs, 366 based on Foata normal form. 7/2611 useless extension candidates. Maximal degree in co-relation 16093. Up to 2230 conditions per place. [2024-06-04 16:02:15,349 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 193 selfloop transitions, 74 changer transitions 0/273 dead transitions. [2024-06-04 16:02:15,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 273 transitions, 3517 flow [2024-06-04 16:02:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-04 16:02:15,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-04 16:02:15,351 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 2816 flow. Second operand 6 states and 134 transitions. [2024-06-04 16:02:15,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 273 transitions, 3517 flow [2024-06-04 16:02:15,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 273 transitions, 3379 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:15,667 INFO L231 Difference]: Finished difference. Result has 222 places, 262 transitions, 2875 flow [2024-06-04 16:02:15,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2875, PETRI_PLACES=222, PETRI_TRANSITIONS=262} [2024-06-04 16:02:15,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-04 16:02:15,667 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 262 transitions, 2875 flow [2024-06-04 16:02:15,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:15,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:15,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:15,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:02:15,668 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:15,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:15,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1401650082, now seen corresponding path program 8 times [2024-06-04 16:02:15,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:15,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557952378] [2024-06-04 16:02:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:15,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:16,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:16,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557952378] [2024-06-04 16:02:16,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557952378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:16,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:16,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072426952] [2024-06-04 16:02:16,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:16,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:16,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:16,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:16,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:16,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:16,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 2875 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:16,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:16,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:16,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:16,444 INFO L124 PetriNetUnfolderBase]: 1550/2616 cut-off events. [2024-06-04 16:02:16,444 INFO L125 PetriNetUnfolderBase]: For 102736/102750 co-relation queries the response was YES. [2024-06-04 16:02:16,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16192 conditions, 2616 events. 1550/2616 cut-off events. For 102736/102750 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15263 event pairs, 344 based on Foata normal form. 15/2631 useless extension candidates. Maximal degree in co-relation 16088. Up to 2236 conditions per place. [2024-06-04 16:02:16,469 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 82 changer transitions 0/284 dead transitions. [2024-06-04 16:02:16,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 284 transitions, 3622 flow [2024-06-04 16:02:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-04 16:02:16,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-04 16:02:16,470 INFO L175 Difference]: Start difference. First operand has 222 places, 262 transitions, 2875 flow. Second operand 8 states and 175 transitions. [2024-06-04 16:02:16,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 284 transitions, 3622 flow [2024-06-04 16:02:16,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 284 transitions, 3494 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:16,847 INFO L231 Difference]: Finished difference. Result has 227 places, 265 transitions, 2966 flow [2024-06-04 16:02:16,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2966, PETRI_PLACES=227, PETRI_TRANSITIONS=265} [2024-06-04 16:02:16,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-04 16:02:16,848 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 265 transitions, 2966 flow [2024-06-04 16:02:16,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:16,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:16,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:02:16,849 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:16,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1401412746, now seen corresponding path program 10 times [2024-06-04 16:02:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:16,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101711725] [2024-06-04 16:02:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:16,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:17,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:17,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101711725] [2024-06-04 16:02:17,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101711725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:17,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:17,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:17,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87305804] [2024-06-04 16:02:17,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:17,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:17,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:17,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:17,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:17,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:17,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 265 transitions, 2966 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:17,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:17,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:17,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:17,652 INFO L124 PetriNetUnfolderBase]: 1547/2612 cut-off events. [2024-06-04 16:02:17,652 INFO L125 PetriNetUnfolderBase]: For 105261/105275 co-relation queries the response was YES. [2024-06-04 16:02:17,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16220 conditions, 2612 events. 1547/2612 cut-off events. For 105261/105275 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15166 event pairs, 344 based on Foata normal form. 15/2627 useless extension candidates. Maximal degree in co-relation 16115. Up to 2197 conditions per place. [2024-06-04 16:02:17,678 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 206 selfloop transitions, 83 changer transitions 0/295 dead transitions. [2024-06-04 16:02:17,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 295 transitions, 3620 flow [2024-06-04 16:02:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:02:17,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 16:02:17,679 INFO L175 Difference]: Start difference. First operand has 227 places, 265 transitions, 2966 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:02:17,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 295 transitions, 3620 flow [2024-06-04 16:02:17,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 295 transitions, 3404 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:17,936 INFO L231 Difference]: Finished difference. Result has 228 places, 265 transitions, 2934 flow [2024-06-04 16:02:17,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2934, PETRI_PLACES=228, PETRI_TRANSITIONS=265} [2024-06-04 16:02:17,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-04 16:02:17,937 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 265 transitions, 2934 flow [2024-06-04 16:02:17,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:17,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:17,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:17,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:02:17,937 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:17,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:17,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1160144280, now seen corresponding path program 9 times [2024-06-04 16:02:17,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:17,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497869985] [2024-06-04 16:02:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:17,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:18,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:18,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497869985] [2024-06-04 16:02:18,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497869985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:18,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:18,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:18,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676101845] [2024-06-04 16:02:18,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:18,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:18,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:18,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:18,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:18,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:18,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 265 transitions, 2934 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:18,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:18,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:18,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:18,825 INFO L124 PetriNetUnfolderBase]: 1544/2608 cut-off events. [2024-06-04 16:02:18,826 INFO L125 PetriNetUnfolderBase]: For 103849/103863 co-relation queries the response was YES. [2024-06-04 16:02:18,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16165 conditions, 2608 events. 1544/2608 cut-off events. For 103849/103863 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15184 event pairs, 344 based on Foata normal form. 15/2623 useless extension candidates. Maximal degree in co-relation 16060. Up to 2229 conditions per place. [2024-06-04 16:02:18,855 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 195 selfloop transitions, 86 changer transitions 0/287 dead transitions. [2024-06-04 16:02:18,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 287 transitions, 3550 flow [2024-06-04 16:02:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:18,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-04 16:02:18,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-04 16:02:18,856 INFO L175 Difference]: Start difference. First operand has 228 places, 265 transitions, 2934 flow. Second operand 9 states and 194 transitions. [2024-06-04 16:02:18,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 287 transitions, 3550 flow [2024-06-04 16:02:19,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 287 transitions, 3350 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:19,144 INFO L231 Difference]: Finished difference. Result has 229 places, 265 transitions, 2920 flow [2024-06-04 16:02:19,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2920, PETRI_PLACES=229, PETRI_TRANSITIONS=265} [2024-06-04 16:02:19,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-04 16:02:19,145 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 265 transitions, 2920 flow [2024-06-04 16:02:19,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:19,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:19,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:19,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:02:19,146 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:19,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:19,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1412771580, now seen corresponding path program 1 times [2024-06-04 16:02:19,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:19,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363416276] [2024-06-04 16:02:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:19,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:19,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:19,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363416276] [2024-06-04 16:02:19,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363416276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:19,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:19,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392448274] [2024-06-04 16:02:19,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:19,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:19,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:19,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:19,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 265 transitions, 2920 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:19,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:19,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:19,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:20,108 INFO L124 PetriNetUnfolderBase]: 1564/2635 cut-off events. [2024-06-04 16:02:20,108 INFO L125 PetriNetUnfolderBase]: For 102796/102796 co-relation queries the response was YES. [2024-06-04 16:02:20,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16115 conditions, 2635 events. 1564/2635 cut-off events. For 102796/102796 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 15247 event pairs, 335 based on Foata normal form. 6/2640 useless extension candidates. Maximal degree in co-relation 16010. Up to 2234 conditions per place. [2024-06-04 16:02:20,134 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 34 changer transitions 0/287 dead transitions. [2024-06-04 16:02:20,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 287 transitions, 3599 flow [2024-06-04 16:02:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-04 16:02:20,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:02:20,136 INFO L175 Difference]: Start difference. First operand has 229 places, 265 transitions, 2920 flow. Second operand 6 states and 135 transitions. [2024-06-04 16:02:20,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 287 transitions, 3599 flow [2024-06-04 16:02:20,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 287 transitions, 3399 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 16:02:20,419 INFO L231 Difference]: Finished difference. Result has 226 places, 269 transitions, 2844 flow [2024-06-04 16:02:20,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2844, PETRI_PLACES=226, PETRI_TRANSITIONS=269} [2024-06-04 16:02:20,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-04 16:02:20,420 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 269 transitions, 2844 flow [2024-06-04 16:02:20,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:20,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:20,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:20,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:02:20,421 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:20,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:20,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1204337510, now seen corresponding path program 7 times [2024-06-04 16:02:20,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:20,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669940263] [2024-06-04 16:02:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:20,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:20,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:20,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669940263] [2024-06-04 16:02:20,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669940263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:20,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:20,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:20,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210955413] [2024-06-04 16:02:20,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:20,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:20,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:20,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:20,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 269 transitions, 2844 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:20,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:20,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:20,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:21,324 INFO L124 PetriNetUnfolderBase]: 1579/2665 cut-off events. [2024-06-04 16:02:21,324 INFO L125 PetriNetUnfolderBase]: For 99153/99153 co-relation queries the response was YES. [2024-06-04 16:02:21,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16105 conditions, 2665 events. 1579/2665 cut-off events. For 99153/99153 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15523 event pairs, 329 based on Foata normal form. 8/2673 useless extension candidates. Maximal degree in co-relation 16000. Up to 2353 conditions per place. [2024-06-04 16:02:21,349 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 254 selfloop transitions, 35 changer transitions 0/295 dead transitions. [2024-06-04 16:02:21,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 295 transitions, 3526 flow [2024-06-04 16:02:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-04 16:02:21,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-04 16:02:21,351 INFO L175 Difference]: Start difference. First operand has 226 places, 269 transitions, 2844 flow. Second operand 9 states and 188 transitions. [2024-06-04 16:02:21,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 295 transitions, 3526 flow [2024-06-04 16:02:21,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 295 transitions, 3485 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:21,626 INFO L231 Difference]: Finished difference. Result has 233 places, 270 transitions, 2892 flow [2024-06-04 16:02:21,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2892, PETRI_PLACES=233, PETRI_TRANSITIONS=270} [2024-06-04 16:02:21,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-04 16:02:21,627 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 270 transitions, 2892 flow [2024-06-04 16:02:21,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:21,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:21,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:21,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:02:21,627 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:21,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:21,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1282336186, now seen corresponding path program 4 times [2024-06-04 16:02:21,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:21,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982118674] [2024-06-04 16:02:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:21,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:22,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:22,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982118674] [2024-06-04 16:02:22,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982118674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:22,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:22,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:22,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030367302] [2024-06-04 16:02:22,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:22,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:22,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:22,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:22,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:22,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:22,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 270 transitions, 2892 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:22,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:22,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:22,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:22,500 INFO L124 PetriNetUnfolderBase]: 1584/2673 cut-off events. [2024-06-04 16:02:22,501 INFO L125 PetriNetUnfolderBase]: For 94702/94708 co-relation queries the response was YES. [2024-06-04 16:02:22,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16329 conditions, 2673 events. 1584/2673 cut-off events. For 94702/94708 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15565 event pairs, 338 based on Foata normal form. 7/2680 useless extension candidates. Maximal degree in co-relation 16222. Up to 2296 conditions per place. [2024-06-04 16:02:22,527 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 226 selfloop transitions, 73 changer transitions 0/305 dead transitions. [2024-06-04 16:02:22,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 305 transitions, 3769 flow [2024-06-04 16:02:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:22,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-04 16:02:22,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516629711751663 [2024-06-04 16:02:22,528 INFO L175 Difference]: Start difference. First operand has 233 places, 270 transitions, 2892 flow. Second operand 11 states and 233 transitions. [2024-06-04 16:02:22,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 305 transitions, 3769 flow [2024-06-04 16:02:22,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 305 transitions, 3694 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:22,805 INFO L231 Difference]: Finished difference. Result has 237 places, 276 transitions, 3083 flow [2024-06-04 16:02:22,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3083, PETRI_PLACES=237, PETRI_TRANSITIONS=276} [2024-06-04 16:02:22,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-04 16:02:22,806 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 276 transitions, 3083 flow [2024-06-04 16:02:22,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:22,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:22,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:22,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:02:22,807 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:22,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:22,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1397607000, now seen corresponding path program 5 times [2024-06-04 16:02:22,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:22,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573739378] [2024-06-04 16:02:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:22,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:23,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:23,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573739378] [2024-06-04 16:02:23,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573739378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:23,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:23,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:23,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247731099] [2024-06-04 16:02:23,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:23,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:23,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:23,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:23,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:23,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 276 transitions, 3083 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:23,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:23,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:23,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:23,713 INFO L124 PetriNetUnfolderBase]: 1581/2672 cut-off events. [2024-06-04 16:02:23,713 INFO L125 PetriNetUnfolderBase]: For 98333/98343 co-relation queries the response was YES. [2024-06-04 16:02:23,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16560 conditions, 2672 events. 1581/2672 cut-off events. For 98333/98343 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15637 event pairs, 353 based on Foata normal form. 11/2683 useless extension candidates. Maximal degree in co-relation 16452. Up to 2350 conditions per place. [2024-06-04 16:02:23,740 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 38 changer transitions 0/288 dead transitions. [2024-06-04 16:02:23,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 288 transitions, 3677 flow [2024-06-04 16:02:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-04 16:02:23,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-04 16:02:23,741 INFO L175 Difference]: Start difference. First operand has 237 places, 276 transitions, 3083 flow. Second operand 5 states and 117 transitions. [2024-06-04 16:02:23,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 288 transitions, 3677 flow [2024-06-04 16:02:24,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 288 transitions, 3475 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-04 16:02:24,063 INFO L231 Difference]: Finished difference. Result has 233 places, 276 transitions, 2971 flow [2024-06-04 16:02:24,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2971, PETRI_PLACES=233, PETRI_TRANSITIONS=276} [2024-06-04 16:02:24,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-04 16:02:24,064 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 276 transitions, 2971 flow [2024-06-04 16:02:24,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:24,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:24,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:24,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:02:24,065 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:24,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1397191290, now seen corresponding path program 6 times [2024-06-04 16:02:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:24,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598904234] [2024-06-04 16:02:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:24,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:24,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:24,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598904234] [2024-06-04 16:02:24,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598904234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:24,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:24,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:24,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189499099] [2024-06-04 16:02:24,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:24,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:24,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:24,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:24,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:24,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 276 transitions, 2971 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:24,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:24,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:24,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:24,931 INFO L124 PetriNetUnfolderBase]: 1586/2678 cut-off events. [2024-06-04 16:02:24,931 INFO L125 PetriNetUnfolderBase]: For 99782/99784 co-relation queries the response was YES. [2024-06-04 16:02:24,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16403 conditions, 2678 events. 1586/2678 cut-off events. For 99782/99784 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15629 event pairs, 338 based on Foata normal form. 3/2681 useless extension candidates. Maximal degree in co-relation 16295. Up to 2318 conditions per place. [2024-06-04 16:02:24,957 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 62 changer transitions 0/301 dead transitions. [2024-06-04 16:02:24,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 301 transitions, 3772 flow [2024-06-04 16:02:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 16:02:24,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-04 16:02:24,958 INFO L175 Difference]: Start difference. First operand has 233 places, 276 transitions, 2971 flow. Second operand 7 states and 162 transitions. [2024-06-04 16:02:24,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 301 transitions, 3772 flow [2024-06-04 16:02:25,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 301 transitions, 3676 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:25,236 INFO L231 Difference]: Finished difference. Result has 235 places, 279 transitions, 3059 flow [2024-06-04 16:02:25,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3059, PETRI_PLACES=235, PETRI_TRANSITIONS=279} [2024-06-04 16:02:25,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-04 16:02:25,236 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 279 transitions, 3059 flow [2024-06-04 16:02:25,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:25,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:25,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:25,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:02:25,237 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:25,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:25,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1392066060, now seen corresponding path program 7 times [2024-06-04 16:02:25,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:25,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661289016] [2024-06-04 16:02:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:25,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:25,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:25,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661289016] [2024-06-04 16:02:25,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661289016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:25,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:25,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234723498] [2024-06-04 16:02:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:25,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:25,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:25,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:25,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 279 transitions, 3059 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:25,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:25,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:25,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:26,174 INFO L124 PetriNetUnfolderBase]: 1591/2685 cut-off events. [2024-06-04 16:02:26,175 INFO L125 PetriNetUnfolderBase]: For 100040/100042 co-relation queries the response was YES. [2024-06-04 16:02:26,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16523 conditions, 2685 events. 1591/2685 cut-off events. For 100040/100042 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15673 event pairs, 336 based on Foata normal form. 3/2688 useless extension candidates. Maximal degree in co-relation 16415. Up to 2324 conditions per place. [2024-06-04 16:02:26,202 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 232 selfloop transitions, 70 changer transitions 0/308 dead transitions. [2024-06-04 16:02:26,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 308 transitions, 3888 flow [2024-06-04 16:02:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-04 16:02:26,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-04 16:02:26,203 INFO L175 Difference]: Start difference. First operand has 235 places, 279 transitions, 3059 flow. Second operand 11 states and 230 transitions. [2024-06-04 16:02:26,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 308 transitions, 3888 flow [2024-06-04 16:02:26,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 308 transitions, 3756 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:26,500 INFO L231 Difference]: Finished difference. Result has 242 places, 282 transitions, 3131 flow [2024-06-04 16:02:26,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3131, PETRI_PLACES=242, PETRI_TRANSITIONS=282} [2024-06-04 16:02:26,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-04 16:02:26,501 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 282 transitions, 3131 flow [2024-06-04 16:02:26,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:26,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:26,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:26,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:02:26,501 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:26,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:26,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1392066246, now seen corresponding path program 10 times [2024-06-04 16:02:26,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:26,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286367605] [2024-06-04 16:02:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:26,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:26,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:26,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286367605] [2024-06-04 16:02:26,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286367605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:26,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:26,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:26,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83058025] [2024-06-04 16:02:26,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:26,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:26,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:26,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:26,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 282 transitions, 3131 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:26,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:26,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:26,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:27,370 INFO L124 PetriNetUnfolderBase]: 1658/2795 cut-off events. [2024-06-04 16:02:27,370 INFO L125 PetriNetUnfolderBase]: For 104284/104286 co-relation queries the response was YES. [2024-06-04 16:02:27,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17325 conditions, 2795 events. 1658/2795 cut-off events. For 104284/104286 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 16419 event pairs, 336 based on Foata normal form. 3/2798 useless extension candidates. Maximal degree in co-relation 17216. Up to 2431 conditions per place. [2024-06-04 16:02:27,399 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 261 selfloop transitions, 67 changer transitions 0/334 dead transitions. [2024-06-04 16:02:27,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 334 transitions, 4249 flow [2024-06-04 16:02:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-04 16:02:27,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-04 16:02:27,400 INFO L175 Difference]: Start difference. First operand has 242 places, 282 transitions, 3131 flow. Second operand 8 states and 175 transitions. [2024-06-04 16:02:27,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 334 transitions, 4249 flow [2024-06-04 16:02:27,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 334 transitions, 3993 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-04 16:02:27,712 INFO L231 Difference]: Finished difference. Result has 244 places, 310 transitions, 3483 flow [2024-06-04 16:02:27,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2900, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3483, PETRI_PLACES=244, PETRI_TRANSITIONS=310} [2024-06-04 16:02:27,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-04 16:02:27,713 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 310 transitions, 3483 flow [2024-06-04 16:02:27,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:27,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:27,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:27,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:02:27,714 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:27,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:27,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1391828910, now seen corresponding path program 8 times [2024-06-04 16:02:27,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:27,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15949519] [2024-06-04 16:02:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:27,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:28,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:28,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15949519] [2024-06-04 16:02:28,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15949519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:28,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:28,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663712393] [2024-06-04 16:02:28,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:28,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:28,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:28,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:28,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 310 transitions, 3483 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:28,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:28,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:28,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:28,627 INFO L124 PetriNetUnfolderBase]: 1655/2793 cut-off events. [2024-06-04 16:02:28,627 INFO L125 PetriNetUnfolderBase]: For 106891/106893 co-relation queries the response was YES. [2024-06-04 16:02:28,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17500 conditions, 2793 events. 1655/2793 cut-off events. For 106891/106893 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 16380 event pairs, 336 based on Foata normal form. 3/2796 useless extension candidates. Maximal degree in co-relation 17388. Up to 2394 conditions per place. [2024-06-04 16:02:28,657 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 251 selfloop transitions, 77 changer transitions 0/334 dead transitions. [2024-06-04 16:02:28,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 334 transitions, 4200 flow [2024-06-04 16:02:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-04 16:02:28,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-04 16:02:28,658 INFO L175 Difference]: Start difference. First operand has 244 places, 310 transitions, 3483 flow. Second operand 10 states and 212 transitions. [2024-06-04 16:02:28,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 334 transitions, 4200 flow [2024-06-04 16:02:28,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 334 transitions, 4061 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:28,919 INFO L231 Difference]: Finished difference. Result has 251 places, 310 transitions, 3504 flow [2024-06-04 16:02:28,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3504, PETRI_PLACES=251, PETRI_TRANSITIONS=310} [2024-06-04 16:02:28,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-04 16:02:28,919 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 310 transitions, 3504 flow [2024-06-04 16:02:28,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:28,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:28,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:28,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:02:28,920 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:28,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1750224682, now seen corresponding path program 11 times [2024-06-04 16:02:28,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:28,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611453001] [2024-06-04 16:02:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:28,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:29,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:29,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611453001] [2024-06-04 16:02:29,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611453001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:29,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:29,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:29,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245456129] [2024-06-04 16:02:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:29,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:29,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:29,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:29,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 310 transitions, 3504 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:29,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:29,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:29,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:29,962 INFO L124 PetriNetUnfolderBase]: 1660/2800 cut-off events. [2024-06-04 16:02:29,962 INFO L125 PetriNetUnfolderBase]: For 110631/110633 co-relation queries the response was YES. [2024-06-04 16:02:29,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17642 conditions, 2800 events. 1660/2800 cut-off events. For 110631/110633 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 16442 event pairs, 336 based on Foata normal form. 3/2803 useless extension candidates. Maximal degree in co-relation 17529. Up to 2469 conditions per place. [2024-06-04 16:02:29,988 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 285 selfloop transitions, 42 changer transitions 0/333 dead transitions. [2024-06-04 16:02:29,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 333 transitions, 4269 flow [2024-06-04 16:02:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-04 16:02:29,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:02:29,989 INFO L175 Difference]: Start difference. First operand has 251 places, 310 transitions, 3504 flow. Second operand 9 states and 189 transitions. [2024-06-04 16:02:29,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 333 transitions, 4269 flow [2024-06-04 16:02:30,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 333 transitions, 4063 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-04 16:02:30,272 INFO L231 Difference]: Finished difference. Result has 250 places, 313 transitions, 3454 flow [2024-06-04 16:02:30,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3454, PETRI_PLACES=250, PETRI_TRANSITIONS=313} [2024-06-04 16:02:30,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-04 16:02:30,273 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 313 transitions, 3454 flow [2024-06-04 16:02:30,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:30,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:30,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:30,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:02:30,274 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:30,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1204334534, now seen corresponding path program 12 times [2024-06-04 16:02:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:30,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710817487] [2024-06-04 16:02:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:30,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:30,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:30,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710817487] [2024-06-04 16:02:30,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710817487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:30,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:30,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:30,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151670873] [2024-06-04 16:02:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:30,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:30,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:30,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:30,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:30,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:30,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 313 transitions, 3454 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:30,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:30,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:30,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:31,145 INFO L124 PetriNetUnfolderBase]: 1657/2796 cut-off events. [2024-06-04 16:02:31,146 INFO L125 PetriNetUnfolderBase]: For 108949/108951 co-relation queries the response was YES. [2024-06-04 16:02:31,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17464 conditions, 2796 events. 1657/2796 cut-off events. For 108949/108951 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 16421 event pairs, 336 based on Foata normal form. 3/2799 useless extension candidates. Maximal degree in co-relation 17350. Up to 2342 conditions per place. [2024-06-04 16:02:31,175 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 118 changer transitions 0/336 dead transitions. [2024-06-04 16:02:31,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 336 transitions, 4227 flow [2024-06-04 16:02:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-04 16:02:31,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 16:02:31,177 INFO L175 Difference]: Start difference. First operand has 250 places, 313 transitions, 3454 flow. Second operand 9 states and 192 transitions. [2024-06-04 16:02:31,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 336 transitions, 4227 flow [2024-06-04 16:02:31,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 336 transitions, 4077 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:31,455 INFO L231 Difference]: Finished difference. Result has 251 places, 316 transitions, 3614 flow [2024-06-04 16:02:31,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3304, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3614, PETRI_PLACES=251, PETRI_TRANSITIONS=316} [2024-06-04 16:02:31,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-04 16:02:31,456 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 316 transitions, 3614 flow [2024-06-04 16:02:31,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:31,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:31,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:31,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:02:31,457 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:31,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:31,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1203937796, now seen corresponding path program 2 times [2024-06-04 16:02:31,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:31,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062996163] [2024-06-04 16:02:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:31,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:31,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:31,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062996163] [2024-06-04 16:02:31,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062996163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:31,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:31,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:31,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001320176] [2024-06-04 16:02:31,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:31,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:31,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:31,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:31,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:31,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 316 transitions, 3614 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:31,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:31,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:31,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:32,387 INFO L124 PetriNetUnfolderBase]: 1677/2831 cut-off events. [2024-06-04 16:02:32,387 INFO L125 PetriNetUnfolderBase]: For 121051/121051 co-relation queries the response was YES. [2024-06-04 16:02:32,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18002 conditions, 2831 events. 1677/2831 cut-off events. For 121051/121051 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16646 event pairs, 329 based on Foata normal form. 6/2837 useless extension candidates. Maximal degree in co-relation 17888. Up to 2466 conditions per place. [2024-06-04 16:02:32,415 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 304 selfloop transitions, 37 changer transitions 0/347 dead transitions. [2024-06-04 16:02:32,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 347 transitions, 4452 flow [2024-06-04 16:02:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-04 16:02:32,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-04 16:02:32,416 INFO L175 Difference]: Start difference. First operand has 251 places, 316 transitions, 3614 flow. Second operand 9 states and 191 transitions. [2024-06-04 16:02:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 347 transitions, 4452 flow [2024-06-04 16:02:32,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 347 transitions, 4164 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:32,713 INFO L231 Difference]: Finished difference. Result has 254 places, 319 transitions, 3446 flow [2024-06-04 16:02:32,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3446, PETRI_PLACES=254, PETRI_TRANSITIONS=319} [2024-06-04 16:02:32,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-04 16:02:32,713 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 319 transitions, 3446 flow [2024-06-04 16:02:32,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:32,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:32,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:32,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:02:32,714 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:32,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1763446120, now seen corresponding path program 3 times [2024-06-04 16:02:32,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:32,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860904828] [2024-06-04 16:02:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:32,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:33,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:33,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860904828] [2024-06-04 16:02:33,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860904828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:33,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:33,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:33,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666820048] [2024-06-04 16:02:33,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:33,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:33,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:33,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:33,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:33,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:33,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 319 transitions, 3446 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:33,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:33,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:33,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:33,628 INFO L124 PetriNetUnfolderBase]: 1664/2812 cut-off events. [2024-06-04 16:02:33,628 INFO L125 PetriNetUnfolderBase]: For 115227/115227 co-relation queries the response was YES. [2024-06-04 16:02:33,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17490 conditions, 2812 events. 1664/2812 cut-off events. For 115227/115227 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16521 event pairs, 320 based on Foata normal form. 6/2818 useless extension candidates. Maximal degree in co-relation 17374. Up to 2283 conditions per place. [2024-06-04 16:02:33,659 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 299 selfloop transitions, 45 changer transitions 0/350 dead transitions. [2024-06-04 16:02:33,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 350 transitions, 4280 flow [2024-06-04 16:02:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-04 16:02:33,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-04 16:02:33,660 INFO L175 Difference]: Start difference. First operand has 254 places, 319 transitions, 3446 flow. Second operand 9 states and 191 transitions. [2024-06-04 16:02:33,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 350 transitions, 4280 flow [2024-06-04 16:02:34,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 350 transitions, 4192 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:34,012 INFO L231 Difference]: Finished difference. Result has 258 places, 321 transitions, 3477 flow [2024-06-04 16:02:34,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3477, PETRI_PLACES=258, PETRI_TRANSITIONS=321} [2024-06-04 16:02:34,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-04 16:02:34,013 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 321 transitions, 3477 flow [2024-06-04 16:02:34,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 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) [2024-06-04 16:02:34,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:34,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:34,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:02:34,013 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:34,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:34,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1758104902, now seen corresponding path program 1 times [2024-06-04 16:02:34,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:34,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953570708] [2024-06-04 16:02:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:34,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:34,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:34,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953570708] [2024-06-04 16:02:34,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953570708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:34,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:34,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:34,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222827009] [2024-06-04 16:02:34,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:34,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:34,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:34,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:34,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:34,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 321 transitions, 3477 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:34,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:34,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:34,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:34,845 INFO L124 PetriNetUnfolderBase]: 1717/2899 cut-off events. [2024-06-04 16:02:34,845 INFO L125 PetriNetUnfolderBase]: For 128715/128717 co-relation queries the response was YES. [2024-06-04 16:02:34,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18251 conditions, 2899 events. 1717/2899 cut-off events. For 128715/128717 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 17155 event pairs, 348 based on Foata normal form. 8/2907 useless extension candidates. Maximal degree in co-relation 18133. Up to 2480 conditions per place. [2024-06-04 16:02:34,874 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 320 selfloop transitions, 29 changer transitions 0/355 dead transitions. [2024-06-04 16:02:34,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 355 transitions, 4443 flow [2024-06-04 16:02:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 16:02:34,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-04 16:02:34,875 INFO L175 Difference]: Start difference. First operand has 258 places, 321 transitions, 3477 flow. Second operand 7 states and 159 transitions. [2024-06-04 16:02:34,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 355 transitions, 4443 flow [2024-06-04 16:02:35,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 355 transitions, 4288 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:35,190 INFO L231 Difference]: Finished difference. Result has 259 places, 326 transitions, 3435 flow [2024-06-04 16:02:35,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3435, PETRI_PLACES=259, PETRI_TRANSITIONS=326} [2024-06-04 16:02:35,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-04 16:02:35,190 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 326 transitions, 3435 flow [2024-06-04 16:02:35,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:35,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:35,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:35,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:02:35,191 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:35,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:35,192 INFO L85 PathProgramCache]: Analyzing trace with hash -497400760, now seen corresponding path program 2 times [2024-06-04 16:02:35,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:35,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464745716] [2024-06-04 16:02:35,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:35,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:35,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:35,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464745716] [2024-06-04 16:02:35,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464745716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:35,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:35,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001528796] [2024-06-04 16:02:35,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:35,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:35,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:35,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:35,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:35,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:35,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 326 transitions, 3435 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:35,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:35,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:35,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:36,097 INFO L124 PetriNetUnfolderBase]: 1783/3006 cut-off events. [2024-06-04 16:02:36,097 INFO L125 PetriNetUnfolderBase]: For 146243/146245 co-relation queries the response was YES. [2024-06-04 16:02:36,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18981 conditions, 3006 events. 1783/3006 cut-off events. For 146243/146245 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17906 event pairs, 366 based on Foata normal form. 8/3014 useless extension candidates. Maximal degree in co-relation 18862. Up to 2630 conditions per place. [2024-06-04 16:02:36,128 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 318 selfloop transitions, 28 changer transitions 0/352 dead transitions. [2024-06-04 16:02:36,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 352 transitions, 4369 flow [2024-06-04 16:02:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:36,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 16:02:36,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-04 16:02:36,129 INFO L175 Difference]: Start difference. First operand has 259 places, 326 transitions, 3435 flow. Second operand 7 states and 156 transitions. [2024-06-04 16:02:36,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 352 transitions, 4369 flow [2024-06-04 16:02:36,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 352 transitions, 4336 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:36,654 INFO L231 Difference]: Finished difference. Result has 265 places, 329 transitions, 3494 flow [2024-06-04 16:02:36,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3494, PETRI_PLACES=265, PETRI_TRANSITIONS=329} [2024-06-04 16:02:36,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-04 16:02:36,655 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 329 transitions, 3494 flow [2024-06-04 16:02:36,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:36,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:36,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:36,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:02:36,656 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:36,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash -497252890, now seen corresponding path program 3 times [2024-06-04 16:02:36,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:36,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761231020] [2024-06-04 16:02:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:36,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:37,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:37,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761231020] [2024-06-04 16:02:37,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761231020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:37,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:37,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:37,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664451018] [2024-06-04 16:02:37,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:37,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:37,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:37,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:37,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 329 transitions, 3494 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:37,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:37,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:37,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:37,542 INFO L124 PetriNetUnfolderBase]: 1765/2980 cut-off events. [2024-06-04 16:02:37,542 INFO L125 PetriNetUnfolderBase]: For 140935/140937 co-relation queries the response was YES. [2024-06-04 16:02:37,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18628 conditions, 2980 events. 1765/2980 cut-off events. For 140935/140937 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17719 event pairs, 364 based on Foata normal form. 10/2990 useless extension candidates. Maximal degree in co-relation 18506. Up to 2652 conditions per place. [2024-06-04 16:02:37,576 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 316 selfloop transitions, 27 changer transitions 0/349 dead transitions. [2024-06-04 16:02:37,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 349 transitions, 4269 flow [2024-06-04 16:02:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-04 16:02:37,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-04 16:02:37,578 INFO L175 Difference]: Start difference. First operand has 265 places, 329 transitions, 3494 flow. Second operand 7 states and 152 transitions. [2024-06-04 16:02:37,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 349 transitions, 4269 flow [2024-06-04 16:02:38,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 349 transitions, 4234 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:38,062 INFO L231 Difference]: Finished difference. Result has 269 places, 330 transitions, 3532 flow [2024-06-04 16:02:38,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3532, PETRI_PLACES=269, PETRI_TRANSITIONS=330} [2024-06-04 16:02:38,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-04 16:02:38,062 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 330 transitions, 3532 flow [2024-06-04 16:02:38,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:38,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:38,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:38,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:02:38,063 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:38,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1397182362, now seen corresponding path program 4 times [2024-06-04 16:02:38,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:38,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012842460] [2024-06-04 16:02:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:38,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:38,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:38,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012842460] [2024-06-04 16:02:38,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012842460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:38,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:38,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:38,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602375684] [2024-06-04 16:02:38,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:38,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:38,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:38,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:38,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:38,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 330 transitions, 3532 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:38,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:38,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:38,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:39,031 INFO L124 PetriNetUnfolderBase]: 1793/3028 cut-off events. [2024-06-04 16:02:39,032 INFO L125 PetriNetUnfolderBase]: For 144940/144942 co-relation queries the response was YES. [2024-06-04 16:02:39,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18994 conditions, 3028 events. 1793/3028 cut-off events. For 144940/144942 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 18127 event pairs, 370 based on Foata normal form. 10/3038 useless extension candidates. Maximal degree in co-relation 18870. Up to 2702 conditions per place. [2024-06-04 16:02:39,060 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 321 selfloop transitions, 22 changer transitions 0/349 dead transitions. [2024-06-04 16:02:39,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 349 transitions, 4304 flow [2024-06-04 16:02:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:39,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-04 16:02:39,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:02:39,061 INFO L175 Difference]: Start difference. First operand has 269 places, 330 transitions, 3532 flow. Second operand 6 states and 135 transitions. [2024-06-04 16:02:39,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 349 transitions, 4304 flow [2024-06-04 16:02:39,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 349 transitions, 4253 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:39,460 INFO L231 Difference]: Finished difference. Result has 270 places, 331 transitions, 3543 flow [2024-06-04 16:02:39,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3543, PETRI_PLACES=270, PETRI_TRANSITIONS=331} [2024-06-04 16:02:39,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-04 16:02:39,460 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 331 transitions, 3543 flow [2024-06-04 16:02:39,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:39,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:39,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:39,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:02:39,461 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:39,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1397330232, now seen corresponding path program 5 times [2024-06-04 16:02:39,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:39,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937826379] [2024-06-04 16:02:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:39,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:39,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:39,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937826379] [2024-06-04 16:02:39,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937826379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:39,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:39,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:39,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113352829] [2024-06-04 16:02:39,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:39,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:39,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:39,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:39,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:39,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 331 transitions, 3543 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:39,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:39,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:39,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:40,420 INFO L124 PetriNetUnfolderBase]: 1813/3055 cut-off events. [2024-06-04 16:02:40,420 INFO L125 PetriNetUnfolderBase]: For 146468/146470 co-relation queries the response was YES. [2024-06-04 16:02:40,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19275 conditions, 3055 events. 1813/3055 cut-off events. For 146468/146470 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 18214 event pairs, 360 based on Foata normal form. 8/3063 useless extension candidates. Maximal degree in co-relation 19150. Up to 2636 conditions per place. [2024-06-04 16:02:40,452 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 327 selfloop transitions, 25 changer transitions 0/358 dead transitions. [2024-06-04 16:02:40,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 358 transitions, 4496 flow [2024-06-04 16:02:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:02:40,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:02:40,453 INFO L175 Difference]: Start difference. First operand has 270 places, 331 transitions, 3543 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:02:40,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 358 transitions, 4496 flow [2024-06-04 16:02:40,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 358 transitions, 4451 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:40,814 INFO L231 Difference]: Finished difference. Result has 273 places, 333 transitions, 3582 flow [2024-06-04 16:02:40,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3582, PETRI_PLACES=273, PETRI_TRANSITIONS=333} [2024-06-04 16:02:40,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-04 16:02:40,815 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 333 transitions, 3582 flow [2024-06-04 16:02:40,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:40,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:40,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:40,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:02:40,817 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:40,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:40,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1391819982, now seen corresponding path program 6 times [2024-06-04 16:02:40,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:40,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574081372] [2024-06-04 16:02:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:40,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:41,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:41,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574081372] [2024-06-04 16:02:41,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574081372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:41,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:41,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:41,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683282537] [2024-06-04 16:02:41,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:41,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:41,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:41,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:41,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 333 transitions, 3582 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:41,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:41,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:41,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:41,840 INFO L124 PetriNetUnfolderBase]: 1795/3034 cut-off events. [2024-06-04 16:02:41,840 INFO L125 PetriNetUnfolderBase]: For 139885/139887 co-relation queries the response was YES. [2024-06-04 16:02:41,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18811 conditions, 3034 events. 1795/3034 cut-off events. For 139885/139887 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 18153 event pairs, 364 based on Foata normal form. 10/3044 useless extension candidates. Maximal degree in co-relation 18684. Up to 2708 conditions per place. [2024-06-04 16:02:41,871 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 324 selfloop transitions, 24 changer transitions 0/354 dead transitions. [2024-06-04 16:02:41,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 354 transitions, 4373 flow [2024-06-04 16:02:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-04 16:02:41,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:02:41,872 INFO L175 Difference]: Start difference. First operand has 273 places, 333 transitions, 3582 flow. Second operand 8 states and 168 transitions. [2024-06-04 16:02:41,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 354 transitions, 4373 flow [2024-06-04 16:02:42,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 354 transitions, 4282 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:42,332 INFO L231 Difference]: Finished difference. Result has 276 places, 334 transitions, 3562 flow [2024-06-04 16:02:42,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3562, PETRI_PLACES=276, PETRI_TRANSITIONS=334} [2024-06-04 16:02:42,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-04 16:02:42,333 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 334 transitions, 3562 flow [2024-06-04 16:02:42,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:42,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:42,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:42,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:02:42,333 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:42,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:42,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1391604780, now seen corresponding path program 1 times [2024-06-04 16:02:42,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:42,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539264933] [2024-06-04 16:02:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:42,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:42,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:42,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539264933] [2024-06-04 16:02:42,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539264933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:42,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:42,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:42,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918495253] [2024-06-04 16:02:42,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:42,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:42,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:42,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:42,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:42,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:42,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 334 transitions, 3562 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:42,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:42,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:42,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:43,314 INFO L124 PetriNetUnfolderBase]: 1782/3007 cut-off events. [2024-06-04 16:02:43,314 INFO L125 PetriNetUnfolderBase]: For 127075/127077 co-relation queries the response was YES. [2024-06-04 16:02:43,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18215 conditions, 3007 events. 1782/3007 cut-off events. For 127075/127077 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 17920 event pairs, 341 based on Foata normal form. 8/3015 useless extension candidates. Maximal degree in co-relation 18088. Up to 2617 conditions per place. [2024-06-04 16:02:43,345 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 323 selfloop transitions, 29 changer transitions 0/358 dead transitions. [2024-06-04 16:02:43,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 358 transitions, 4371 flow [2024-06-04 16:02:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-04 16:02:43,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-04 16:02:43,346 INFO L175 Difference]: Start difference. First operand has 276 places, 334 transitions, 3562 flow. Second operand 8 states and 171 transitions. [2024-06-04 16:02:43,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 358 transitions, 4371 flow [2024-06-04 16:02:43,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 358 transitions, 4324 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:43,870 INFO L231 Difference]: Finished difference. Result has 278 places, 334 transitions, 3577 flow [2024-06-04 16:02:43,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3577, PETRI_PLACES=278, PETRI_TRANSITIONS=334} [2024-06-04 16:02:43,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-04 16:02:43,870 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 334 transitions, 3577 flow [2024-06-04 16:02:43,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:43,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:43,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:43,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:02:43,871 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:43,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:43,871 INFO L85 PathProgramCache]: Analyzing trace with hash 262612092, now seen corresponding path program 1 times [2024-06-04 16:02:43,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:43,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007040774] [2024-06-04 16:02:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:43,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:44,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:44,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007040774] [2024-06-04 16:02:44,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007040774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:44,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:44,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:44,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404839488] [2024-06-04 16:02:44,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:44,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:44,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:44,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:44,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 334 transitions, 3577 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:44,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:44,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:44,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:44,850 INFO L124 PetriNetUnfolderBase]: 1803/3045 cut-off events. [2024-06-04 16:02:44,850 INFO L125 PetriNetUnfolderBase]: For 125842/125850 co-relation queries the response was YES. [2024-06-04 16:02:44,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18694 conditions, 3045 events. 1803/3045 cut-off events. For 125842/125850 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 18267 event pairs, 397 based on Foata normal form. 9/3053 useless extension candidates. Maximal degree in co-relation 18566. Up to 2389 conditions per place. [2024-06-04 16:02:44,882 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 172 changer transitions 0/373 dead transitions. [2024-06-04 16:02:44,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 373 transitions, 4801 flow [2024-06-04 16:02:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:02:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:02:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-04 16:02:44,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-04 16:02:44,883 INFO L175 Difference]: Start difference. First operand has 278 places, 334 transitions, 3577 flow. Second operand 12 states and 255 transitions. [2024-06-04 16:02:44,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 373 transitions, 4801 flow [2024-06-04 16:02:45,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 373 transitions, 4720 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:45,354 INFO L231 Difference]: Finished difference. Result has 283 places, 343 transitions, 4014 flow [2024-06-04 16:02:45,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4014, PETRI_PLACES=283, PETRI_TRANSITIONS=343} [2024-06-04 16:02:45,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-04 16:02:45,354 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 343 transitions, 4014 flow [2024-06-04 16:02:45,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:45,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:45,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:45,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:02:45,355 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:45,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:45,355 INFO L85 PathProgramCache]: Analyzing trace with hash -269129074, now seen corresponding path program 2 times [2024-06-04 16:02:45,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:45,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495175112] [2024-06-04 16:02:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:45,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:45,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:45,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495175112] [2024-06-04 16:02:45,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495175112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:45,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:45,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:45,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869765838] [2024-06-04 16:02:45,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:45,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:45,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:45,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:45,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:45,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:45,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 343 transitions, 4014 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:45,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:45,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:45,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:46,391 INFO L124 PetriNetUnfolderBase]: 1816/3068 cut-off events. [2024-06-04 16:02:46,391 INFO L125 PetriNetUnfolderBase]: For 134580/134590 co-relation queries the response was YES. [2024-06-04 16:02:46,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19437 conditions, 3068 events. 1816/3068 cut-off events. For 134580/134590 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18480 event pairs, 380 based on Foata normal form. 11/3079 useless extension candidates. Maximal degree in co-relation 19309. Up to 2603 conditions per place. [2024-06-04 16:02:46,430 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 118 changer transitions 0/375 dead transitions. [2024-06-04 16:02:46,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 375 transitions, 5064 flow [2024-06-04 16:02:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:02:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:02:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-04 16:02:46,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-04 16:02:46,431 INFO L175 Difference]: Start difference. First operand has 283 places, 343 transitions, 4014 flow. Second operand 12 states and 247 transitions. [2024-06-04 16:02:46,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 375 transitions, 5064 flow [2024-06-04 16:02:46,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 375 transitions, 4731 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:46,996 INFO L231 Difference]: Finished difference. Result has 288 places, 349 transitions, 4051 flow [2024-06-04 16:02:46,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3739, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4051, PETRI_PLACES=288, PETRI_TRANSITIONS=349} [2024-06-04 16:02:46,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-04 16:02:46,996 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 349 transitions, 4051 flow [2024-06-04 16:02:46,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:46,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:46,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:46,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:02:46,997 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:46,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1332095526, now seen corresponding path program 3 times [2024-06-04 16:02:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:46,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48091641] [2024-06-04 16:02:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:47,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:47,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48091641] [2024-06-04 16:02:47,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48091641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:47,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:47,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:47,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526993380] [2024-06-04 16:02:47,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:47,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:47,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:47,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:47,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:47,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:47,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 349 transitions, 4051 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:47,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:47,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:47,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:48,029 INFO L124 PetriNetUnfolderBase]: 1813/3064 cut-off events. [2024-06-04 16:02:48,030 INFO L125 PetriNetUnfolderBase]: For 131666/131676 co-relation queries the response was YES. [2024-06-04 16:02:48,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19348 conditions, 3064 events. 1813/3064 cut-off events. For 131666/131676 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18417 event pairs, 380 based on Foata normal form. 11/3075 useless extension candidates. Maximal degree in co-relation 19218. Up to 2600 conditions per place. [2024-06-04 16:02:48,064 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 118 changer transitions 0/375 dead transitions. [2024-06-04 16:02:48,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 375 transitions, 4851 flow [2024-06-04 16:02:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:02:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:02:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-04 16:02:48,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915572232645403 [2024-06-04 16:02:48,065 INFO L175 Difference]: Start difference. First operand has 288 places, 349 transitions, 4051 flow. Second operand 13 states and 262 transitions. [2024-06-04 16:02:48,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 375 transitions, 4851 flow [2024-06-04 16:02:48,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 375 transitions, 4675 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:48,651 INFO L231 Difference]: Finished difference. Result has 293 places, 349 transitions, 4117 flow [2024-06-04 16:02:48,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4117, PETRI_PLACES=293, PETRI_TRANSITIONS=349} [2024-06-04 16:02:48,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-04 16:02:48,651 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 349 transitions, 4117 flow [2024-06-04 16:02:48,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:48,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:48,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:48,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:02:48,652 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:48,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:48,652 INFO L85 PathProgramCache]: Analyzing trace with hash 934337980, now seen corresponding path program 4 times [2024-06-04 16:02:48,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:48,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759716009] [2024-06-04 16:02:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:48,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:49,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:49,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759716009] [2024-06-04 16:02:49,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759716009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:49,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:49,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336087341] [2024-06-04 16:02:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:49,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:49,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:49,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:49,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:49,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:49,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 349 transitions, 4117 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:49,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:49,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:49,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:49,671 INFO L124 PetriNetUnfolderBase]: 1834/3099 cut-off events. [2024-06-04 16:02:49,671 INFO L125 PetriNetUnfolderBase]: For 139573/139583 co-relation queries the response was YES. [2024-06-04 16:02:49,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19909 conditions, 3099 events. 1834/3099 cut-off events. For 139573/139583 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 18678 event pairs, 380 based on Foata normal form. 11/3110 useless extension candidates. Maximal degree in co-relation 19777. Up to 2604 conditions per place. [2024-06-04 16:02:49,707 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 245 selfloop transitions, 130 changer transitions 0/381 dead transitions. [2024-06-04 16:02:49,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 381 transitions, 5169 flow [2024-06-04 16:02:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:02:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:02:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-04 16:02:49,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-04 16:02:49,709 INFO L175 Difference]: Start difference. First operand has 293 places, 349 transitions, 4117 flow. Second operand 12 states and 244 transitions. [2024-06-04 16:02:49,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 381 transitions, 5169 flow [2024-06-04 16:02:50,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 381 transitions, 4929 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-04 16:02:50,396 INFO L231 Difference]: Finished difference. Result has 294 places, 358 transitions, 4290 flow [2024-06-04 16:02:50,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3877, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4290, PETRI_PLACES=294, PETRI_TRANSITIONS=358} [2024-06-04 16:02:50,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-04 16:02:50,397 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 358 transitions, 4290 flow [2024-06-04 16:02:50,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:50,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:50,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:50,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:02:50,397 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:50,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:50,397 INFO L85 PathProgramCache]: Analyzing trace with hash 926986330, now seen corresponding path program 5 times [2024-06-04 16:02:50,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:50,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486521895] [2024-06-04 16:02:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:50,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:50,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:50,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486521895] [2024-06-04 16:02:50,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486521895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:50,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:50,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:50,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443236250] [2024-06-04 16:02:50,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:50,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:50,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:50,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:50,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:50,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:50,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 358 transitions, 4290 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:50,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:50,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:50,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:51,487 INFO L124 PetriNetUnfolderBase]: 1839/3108 cut-off events. [2024-06-04 16:02:51,488 INFO L125 PetriNetUnfolderBase]: For 143541/143551 co-relation queries the response was YES. [2024-06-04 16:02:51,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 3108 events. 1839/3108 cut-off events. For 143541/143551 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18750 event pairs, 380 based on Foata normal form. 11/3119 useless extension candidates. Maximal degree in co-relation 19973. Up to 2610 conditions per place. [2024-06-04 16:02:51,524 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 132 changer transitions 0/388 dead transitions. [2024-06-04 16:02:51,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 388 transitions, 5431 flow [2024-06-04 16:02:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:02:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:02:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-04 16:02:51,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-04 16:02:51,525 INFO L175 Difference]: Start difference. First operand has 294 places, 358 transitions, 4290 flow. Second operand 15 states and 298 transitions. [2024-06-04 16:02:51,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 388 transitions, 5431 flow [2024-06-04 16:02:52,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 388 transitions, 5248 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:52,320 INFO L231 Difference]: Finished difference. Result has 301 places, 361 transitions, 4424 flow [2024-06-04 16:02:52,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4424, PETRI_PLACES=301, PETRI_TRANSITIONS=361} [2024-06-04 16:02:52,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-04 16:02:52,321 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 361 transitions, 4424 flow [2024-06-04 16:02:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:52,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:52,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:52,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:02:52,322 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:52,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:52,322 INFO L85 PathProgramCache]: Analyzing trace with hash 926980750, now seen corresponding path program 6 times [2024-06-04 16:02:52,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:52,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780403821] [2024-06-04 16:02:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:52,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:52,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:52,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780403821] [2024-06-04 16:02:52,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780403821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:52,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:52,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:52,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348963748] [2024-06-04 16:02:52,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:52,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:52,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:52,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:52,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:52,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:52,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 361 transitions, 4424 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:52,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:52,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:52,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:53,372 INFO L124 PetriNetUnfolderBase]: 1836/3104 cut-off events. [2024-06-04 16:02:53,372 INFO L125 PetriNetUnfolderBase]: For 144826/144836 co-relation queries the response was YES. [2024-06-04 16:02:53,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20267 conditions, 3104 events. 1836/3104 cut-off events. For 144826/144836 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18710 event pairs, 380 based on Foata normal form. 11/3115 useless extension candidates. Maximal degree in co-relation 20131. Up to 2607 conditions per place. [2024-06-04 16:02:53,410 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 247 selfloop transitions, 132 changer transitions 0/385 dead transitions. [2024-06-04 16:02:53,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 385 transitions, 5374 flow [2024-06-04 16:02:53,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:02:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:02:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-04 16:02:53,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343339587242024 [2024-06-04 16:02:53,411 INFO L175 Difference]: Start difference. First operand has 301 places, 361 transitions, 4424 flow. Second operand 13 states and 263 transitions. [2024-06-04 16:02:53,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 385 transitions, 5374 flow [2024-06-04 16:02:54,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 385 transitions, 4997 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-06-04 16:02:54,079 INFO L231 Difference]: Finished difference. Result has 302 places, 361 transitions, 4317 flow [2024-06-04 16:02:54,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4047, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4317, PETRI_PLACES=302, PETRI_TRANSITIONS=361} [2024-06-04 16:02:54,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-04 16:02:54,080 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 361 transitions, 4317 flow [2024-06-04 16:02:54,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:54,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:54,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:54,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:02:54,080 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:54,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash -539982714, now seen corresponding path program 7 times [2024-06-04 16:02:54,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:54,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529380964] [2024-06-04 16:02:54,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:54,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:54,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529380964] [2024-06-04 16:02:54,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529380964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:54,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:54,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277054783] [2024-06-04 16:02:54,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:54,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:54,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:54,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:54,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:54,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:54,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 361 transitions, 4317 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:54,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:54,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:54,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:55,177 INFO L124 PetriNetUnfolderBase]: 1849/3126 cut-off events. [2024-06-04 16:02:55,177 INFO L125 PetriNetUnfolderBase]: For 151118/151128 co-relation queries the response was YES. [2024-06-04 16:02:55,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20293 conditions, 3126 events. 1849/3126 cut-off events. For 151118/151128 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18886 event pairs, 380 based on Foata normal form. 11/3137 useless extension candidates. Maximal degree in co-relation 20157. Up to 2528 conditions per place. [2024-06-04 16:02:55,219 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 142 changer transitions 0/399 dead transitions. [2024-06-04 16:02:55,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 399 transitions, 5549 flow [2024-06-04 16:02:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-04 16:02:55,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:02:55,221 INFO L175 Difference]: Start difference. First operand has 302 places, 361 transitions, 4317 flow. Second operand 11 states and 242 transitions. [2024-06-04 16:02:55,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 399 transitions, 5549 flow [2024-06-04 16:02:56,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 399 transitions, 5285 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-04 16:02:56,093 INFO L231 Difference]: Finished difference. Result has 301 places, 367 transitions, 4435 flow [2024-06-04 16:02:56,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4435, PETRI_PLACES=301, PETRI_TRANSITIONS=367} [2024-06-04 16:02:56,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-04 16:02:56,094 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 367 transitions, 4435 flow [2024-06-04 16:02:56,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:56,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:56,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:56,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:02:56,094 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:56,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:56,095 INFO L85 PathProgramCache]: Analyzing trace with hash -706216494, now seen corresponding path program 8 times [2024-06-04 16:02:56,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:56,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351431108] [2024-06-04 16:02:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:56,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:56,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:56,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351431108] [2024-06-04 16:02:56,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351431108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:56,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:56,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:56,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456495256] [2024-06-04 16:02:56,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:56,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:56,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:56,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:56,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 367 transitions, 4435 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:56,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:56,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:56,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:57,108 INFO L124 PetriNetUnfolderBase]: 1854/3134 cut-off events. [2024-06-04 16:02:57,108 INFO L125 PetriNetUnfolderBase]: For 155591/155599 co-relation queries the response was YES. [2024-06-04 16:02:57,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20464 conditions, 3134 events. 1854/3134 cut-off events. For 155591/155599 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18938 event pairs, 397 based on Foata normal form. 9/3142 useless extension candidates. Maximal degree in co-relation 20327. Up to 2534 conditions per place. [2024-06-04 16:02:57,147 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 136 changer transitions 0/393 dead transitions. [2024-06-04 16:02:57,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 393 transitions, 5597 flow [2024-06-04 16:02:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:57,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:02:57,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-04 16:02:57,148 INFO L175 Difference]: Start difference. First operand has 301 places, 367 transitions, 4435 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:02:57,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 393 transitions, 5597 flow [2024-06-04 16:02:57,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 393 transitions, 5295 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:57,894 INFO L231 Difference]: Finished difference. Result has 302 places, 370 transitions, 4463 flow [2024-06-04 16:02:57,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4463, PETRI_PLACES=302, PETRI_TRANSITIONS=370} [2024-06-04 16:02:57,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-04 16:02:57,894 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 370 transitions, 4463 flow [2024-06-04 16:02:57,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:57,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:57,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:57,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:02:57,895 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:57,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash -702497424, now seen corresponding path program 9 times [2024-06-04 16:02:57,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:57,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486355386] [2024-06-04 16:02:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:57,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:58,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486355386] [2024-06-04 16:02:58,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486355386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:58,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:58,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:58,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616613878] [2024-06-04 16:02:58,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:58,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:58,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:58,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:58,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:58,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 370 transitions, 4463 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:58,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:58,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:58,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:58,979 INFO L124 PetriNetUnfolderBase]: 1859/3144 cut-off events. [2024-06-04 16:02:58,979 INFO L125 PetriNetUnfolderBase]: For 159269/159279 co-relation queries the response was YES. [2024-06-04 16:02:59,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20541 conditions, 3144 events. 1859/3144 cut-off events. For 159269/159279 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 19014 event pairs, 380 based on Foata normal form. 11/3155 useless extension candidates. Maximal degree in co-relation 20403. Up to 2695 conditions per place. [2024-06-04 16:02:59,020 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 302 selfloop transitions, 84 changer transitions 0/392 dead transitions. [2024-06-04 16:02:59,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 392 transitions, 5476 flow [2024-06-04 16:02:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-04 16:02:59,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-04 16:02:59,021 INFO L175 Difference]: Start difference. First operand has 302 places, 370 transitions, 4463 flow. Second operand 8 states and 177 transitions. [2024-06-04 16:02:59,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 392 transitions, 5476 flow [2024-06-04 16:02:59,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 392 transitions, 5172 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:59,958 INFO L231 Difference]: Finished difference. Result has 304 places, 373 transitions, 4386 flow [2024-06-04 16:02:59,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4386, PETRI_PLACES=304, PETRI_TRANSITIONS=373} [2024-06-04 16:02:59,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-04 16:02:59,958 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 373 transitions, 4386 flow [2024-06-04 16:02:59,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:59,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:59,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:59,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:02:59,959 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:59,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:59,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1286961702, now seen corresponding path program 10 times [2024-06-04 16:02:59,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:59,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930830082] [2024-06-04 16:02:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:59,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:00,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:00,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930830082] [2024-06-04 16:03:00,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930830082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:00,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:00,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:00,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521694337] [2024-06-04 16:03:00,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:00,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:00,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:00,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:00,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 373 transitions, 4386 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:00,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:00,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:00,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:01,046 INFO L124 PetriNetUnfolderBase]: 1856/3140 cut-off events. [2024-06-04 16:03:01,046 INFO L125 PetriNetUnfolderBase]: For 160022/160032 co-relation queries the response was YES. [2024-06-04 16:03:01,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20345 conditions, 3140 events. 1856/3140 cut-off events. For 160022/160032 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 18949 event pairs, 380 based on Foata normal form. 11/3151 useless extension candidates. Maximal degree in co-relation 20206. Up to 2692 conditions per place. [2024-06-04 16:03:01,087 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 300 selfloop transitions, 87 changer transitions 0/393 dead transitions. [2024-06-04 16:03:01,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 393 transitions, 5208 flow [2024-06-04 16:03:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-04 16:03:01,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-04 16:03:01,088 INFO L175 Difference]: Start difference. First operand has 304 places, 373 transitions, 4386 flow. Second operand 10 states and 209 transitions. [2024-06-04 16:03:01,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 393 transitions, 5208 flow [2024-06-04 16:03:01,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 393 transitions, 4992 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:01,963 INFO L231 Difference]: Finished difference. Result has 308 places, 373 transitions, 4351 flow [2024-06-04 16:03:01,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4351, PETRI_PLACES=308, PETRI_TRANSITIONS=373} [2024-06-04 16:03:01,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-04 16:03:01,964 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 373 transitions, 4351 flow [2024-06-04 16:03:01,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:01,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:01,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:01,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:03:01,964 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:01,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash -530717124, now seen corresponding path program 11 times [2024-06-04 16:03:01,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:01,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891232226] [2024-06-04 16:03:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:01,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:02,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:02,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891232226] [2024-06-04 16:03:02,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891232226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:02,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:02,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:02,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782766438] [2024-06-04 16:03:02,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:02,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:02,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:02,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:02,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 373 transitions, 4351 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:02,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:02,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:02,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:03,015 INFO L124 PetriNetUnfolderBase]: 1869/3162 cut-off events. [2024-06-04 16:03:03,015 INFO L125 PetriNetUnfolderBase]: For 166492/166502 co-relation queries the response was YES. [2024-06-04 16:03:03,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20548 conditions, 3162 events. 1869/3162 cut-off events. For 166492/166502 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19146 event pairs, 380 based on Foata normal form. 11/3173 useless extension candidates. Maximal degree in co-relation 20408. Up to 2552 conditions per place. [2024-06-04 16:03:03,056 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 160 changer transitions 0/410 dead transitions. [2024-06-04 16:03:03,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 410 transitions, 5595 flow [2024-06-04 16:03:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:03:03,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:03:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-04 16:03:03,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:03:03,057 INFO L175 Difference]: Start difference. First operand has 308 places, 373 transitions, 4351 flow. Second operand 13 states and 273 transitions. [2024-06-04 16:03:03,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 410 transitions, 5595 flow [2024-06-04 16:03:04,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 410 transitions, 5391 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:04,045 INFO L231 Difference]: Finished difference. Result has 311 places, 379 transitions, 4543 flow [2024-06-04 16:03:04,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4543, PETRI_PLACES=311, PETRI_TRANSITIONS=379} [2024-06-04 16:03:04,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-04 16:03:04,046 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 379 transitions, 4543 flow [2024-06-04 16:03:04,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:04,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:04,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:04,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:03:04,047 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:04,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash -530728284, now seen corresponding path program 12 times [2024-06-04 16:03:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:04,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881850609] [2024-06-04 16:03:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:04,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:04,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:04,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881850609] [2024-06-04 16:03:04,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881850609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:04,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:04,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:04,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748819647] [2024-06-04 16:03:04,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:04,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:04,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:04,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:04,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:04,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 379 transitions, 4543 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:04,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:04,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:04,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:05,081 INFO L124 PetriNetUnfolderBase]: 1866/3158 cut-off events. [2024-06-04 16:03:05,082 INFO L125 PetriNetUnfolderBase]: For 168278/168288 co-relation queries the response was YES. [2024-06-04 16:03:05,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20674 conditions, 3158 events. 1866/3158 cut-off events. For 168278/168288 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19156 event pairs, 380 based on Foata normal form. 11/3169 useless extension candidates. Maximal degree in co-relation 20533. Up to 2549 conditions per place. [2024-06-04 16:03:05,121 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 245 selfloop transitions, 158 changer transitions 0/409 dead transitions. [2024-06-04 16:03:05,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 409 transitions, 5569 flow [2024-06-04 16:03:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:03:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:03:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-04 16:03:05,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140712945590994 [2024-06-04 16:03:05,122 INFO L175 Difference]: Start difference. First operand has 311 places, 379 transitions, 4543 flow. Second operand 13 states and 274 transitions. [2024-06-04 16:03:05,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 409 transitions, 5569 flow [2024-06-04 16:03:06,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 409 transitions, 5268 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:06,049 INFO L231 Difference]: Finished difference. Result has 315 places, 379 transitions, 4564 flow [2024-06-04 16:03:06,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4564, PETRI_PLACES=315, PETRI_TRANSITIONS=379} [2024-06-04 16:03:06,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-04 16:03:06,050 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 379 transitions, 4564 flow [2024-06-04 16:03:06,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:06,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:06,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:06,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:03:06,050 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:06,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1668125764, now seen corresponding path program 13 times [2024-06-04 16:03:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558556244] [2024-06-04 16:03:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:06,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:06,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558556244] [2024-06-04 16:03:06,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558556244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:06,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:06,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:06,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526141792] [2024-06-04 16:03:06,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:06,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:06,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:06,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:06,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:06,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:06,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 379 transitions, 4564 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:06,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:06,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:06,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:07,201 INFO L124 PetriNetUnfolderBase]: 1911/3236 cut-off events. [2024-06-04 16:03:07,201 INFO L125 PetriNetUnfolderBase]: For 181694/181704 co-relation queries the response was YES. [2024-06-04 16:03:07,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21418 conditions, 3236 events. 1911/3236 cut-off events. For 181694/181704 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19699 event pairs, 380 based on Foata normal form. 11/3247 useless extension candidates. Maximal degree in co-relation 21276. Up to 2668 conditions per place. [2024-06-04 16:03:07,245 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 285 selfloop transitions, 129 changer transitions 0/420 dead transitions. [2024-06-04 16:03:07,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 420 transitions, 6009 flow [2024-06-04 16:03:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:03:07,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:03:07,247 INFO L175 Difference]: Start difference. First operand has 315 places, 379 transitions, 4564 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:03:07,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 420 transitions, 6009 flow [2024-06-04 16:03:08,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 420 transitions, 5651 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-04 16:03:08,253 INFO L231 Difference]: Finished difference. Result has 312 places, 397 transitions, 4808 flow [2024-06-04 16:03:08,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4240, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4808, PETRI_PLACES=312, PETRI_TRANSITIONS=397} [2024-06-04 16:03:08,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-04 16:03:08,254 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 397 transitions, 4808 flow [2024-06-04 16:03:08,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:08,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:08,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:08,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:03:08,254 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:08,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1668304324, now seen corresponding path program 14 times [2024-06-04 16:03:08,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:08,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122977151] [2024-06-04 16:03:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122977151] [2024-06-04 16:03:08,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122977151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:08,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:08,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:08,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53315128] [2024-06-04 16:03:08,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:08,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:08,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:08,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:08,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:08,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 397 transitions, 4808 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:08,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:08,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:08,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:09,360 INFO L124 PetriNetUnfolderBase]: 1916/3245 cut-off events. [2024-06-04 16:03:09,360 INFO L125 PetriNetUnfolderBase]: For 186272/186282 co-relation queries the response was YES. [2024-06-04 16:03:09,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21566 conditions, 3245 events. 1916/3245 cut-off events. For 186272/186282 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19745 event pairs, 380 based on Foata normal form. 11/3256 useless extension candidates. Maximal degree in co-relation 21422. Up to 2674 conditions per place. [2024-06-04 16:03:09,400 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 283 selfloop transitions, 139 changer transitions 0/428 dead transitions. [2024-06-04 16:03:09,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 428 transitions, 6077 flow [2024-06-04 16:03:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-04 16:03:09,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-04 16:03:09,402 INFO L175 Difference]: Start difference. First operand has 312 places, 397 transitions, 4808 flow. Second operand 10 states and 221 transitions. [2024-06-04 16:03:09,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 428 transitions, 6077 flow [2024-06-04 16:03:10,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 428 transitions, 5973 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:10,445 INFO L231 Difference]: Finished difference. Result has 319 places, 400 transitions, 5047 flow [2024-06-04 16:03:10,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5047, PETRI_PLACES=319, PETRI_TRANSITIONS=400} [2024-06-04 16:03:10,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-04 16:03:10,446 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 400 transitions, 5047 flow [2024-06-04 16:03:10,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:10,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:10,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:10,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:03:10,447 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:10,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1667952784, now seen corresponding path program 15 times [2024-06-04 16:03:10,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:10,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882725813] [2024-06-04 16:03:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:10,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:10,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:10,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882725813] [2024-06-04 16:03:10,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882725813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:10,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:10,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:10,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377567459] [2024-06-04 16:03:10,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:10,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:10,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:10,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:10,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:10,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:10,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 400 transitions, 5047 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:10,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:10,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:10,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:11,528 INFO L124 PetriNetUnfolderBase]: 1913/3241 cut-off events. [2024-06-04 16:03:11,528 INFO L125 PetriNetUnfolderBase]: For 188061/188071 co-relation queries the response was YES. [2024-06-04 16:03:11,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21832 conditions, 3241 events. 1913/3241 cut-off events. For 188061/188071 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19758 event pairs, 380 based on Foata normal form. 11/3252 useless extension candidates. Maximal degree in co-relation 21686. Up to 2671 conditions per place. [2024-06-04 16:03:11,570 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 138 changer transitions 0/425 dead transitions. [2024-06-04 16:03:11,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 425 transitions, 6253 flow [2024-06-04 16:03:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 16:03:11,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-04 16:03:11,572 INFO L175 Difference]: Start difference. First operand has 319 places, 400 transitions, 5047 flow. Second operand 10 states and 219 transitions. [2024-06-04 16:03:11,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 425 transitions, 6253 flow [2024-06-04 16:03:12,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 425 transitions, 5976 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:12,556 INFO L231 Difference]: Finished difference. Result has 321 places, 400 transitions, 5056 flow [2024-06-04 16:03:12,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5056, PETRI_PLACES=321, PETRI_TRANSITIONS=400} [2024-06-04 16:03:12,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-04 16:03:12,557 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 400 transitions, 5056 flow [2024-06-04 16:03:12,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:12,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:12,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:12,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:03:12,558 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:12,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:12,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1668136924, now seen corresponding path program 16 times [2024-06-04 16:03:12,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:12,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85269599] [2024-06-04 16:03:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:12,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:12,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:12,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85269599] [2024-06-04 16:03:12,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85269599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:12,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:12,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:12,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525071820] [2024-06-04 16:03:12,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:12,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:12,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:12,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:13,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:13,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 400 transitions, 5056 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:13,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:13,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:13,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:13,636 INFO L124 PetriNetUnfolderBase]: 1910/3237 cut-off events. [2024-06-04 16:03:13,637 INFO L125 PetriNetUnfolderBase]: For 185149/185159 co-relation queries the response was YES. [2024-06-04 16:03:13,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21731 conditions, 3237 events. 1910/3237 cut-off events. For 185149/185159 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19751 event pairs, 380 based on Foata normal form. 11/3248 useless extension candidates. Maximal degree in co-relation 21585. Up to 2668 conditions per place. [2024-06-04 16:03:13,676 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 131 changer transitions 0/425 dead transitions. [2024-06-04 16:03:13,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 425 transitions, 6110 flow [2024-06-04 16:03:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:03:13,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 16:03:13,678 INFO L175 Difference]: Start difference. First operand has 321 places, 400 transitions, 5056 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:03:13,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 425 transitions, 6110 flow [2024-06-04 16:03:14,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 425 transitions, 5816 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:14,719 INFO L231 Difference]: Finished difference. Result has 322 places, 400 transitions, 5030 flow [2024-06-04 16:03:14,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4762, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5030, PETRI_PLACES=322, PETRI_TRANSITIONS=400} [2024-06-04 16:03:14,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-04 16:03:14,720 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 400 transitions, 5030 flow [2024-06-04 16:03:14,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:14,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:14,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:14,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:03:14,720 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:14,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:14,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1667958364, now seen corresponding path program 17 times [2024-06-04 16:03:14,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:14,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740585345] [2024-06-04 16:03:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:14,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:15,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:15,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740585345] [2024-06-04 16:03:15,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740585345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:15,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:15,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:15,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487569628] [2024-06-04 16:03:15,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:15,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:15,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:15,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:15,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:15,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:15,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 400 transitions, 5030 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:15,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:15,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:15,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:15,873 INFO L124 PetriNetUnfolderBase]: 1907/3233 cut-off events. [2024-06-04 16:03:15,873 INFO L125 PetriNetUnfolderBase]: For 186319/186329 co-relation queries the response was YES. [2024-06-04 16:03:15,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21656 conditions, 3233 events. 1907/3233 cut-off events. For 186319/186329 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19752 event pairs, 380 based on Foata normal form. 11/3244 useless extension candidates. Maximal degree in co-relation 21509. Up to 2665 conditions per place. [2024-06-04 16:03:15,917 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 139 changer transitions 0/425 dead transitions. [2024-06-04 16:03:15,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 425 transitions, 6084 flow [2024-06-04 16:03:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-04 16:03:15,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-04 16:03:15,918 INFO L175 Difference]: Start difference. First operand has 322 places, 400 transitions, 5030 flow. Second operand 11 states and 234 transitions. [2024-06-04 16:03:15,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 425 transitions, 6084 flow [2024-06-04 16:03:16,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 425 transitions, 5802 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:16,964 INFO L231 Difference]: Finished difference. Result has 328 places, 400 transitions, 5033 flow [2024-06-04 16:03:16,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4748, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5033, PETRI_PLACES=328, PETRI_TRANSITIONS=400} [2024-06-04 16:03:16,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-04 16:03:16,965 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 400 transitions, 5033 flow [2024-06-04 16:03:16,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:16,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:16,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:16,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:03:16,965 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:16,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1668309904, now seen corresponding path program 18 times [2024-06-04 16:03:16,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:16,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946274410] [2024-06-04 16:03:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:16,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:17,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:17,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946274410] [2024-06-04 16:03:17,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946274410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:17,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:17,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:17,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926556215] [2024-06-04 16:03:17,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:17,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:17,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:17,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:17,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:17,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 400 transitions, 5033 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:17,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:17,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:17,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:18,077 INFO L124 PetriNetUnfolderBase]: 1904/3229 cut-off events. [2024-06-04 16:03:18,078 INFO L125 PetriNetUnfolderBase]: For 187248/187258 co-relation queries the response was YES. [2024-06-04 16:03:18,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21594 conditions, 3229 events. 1904/3229 cut-off events. For 187248/187258 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19696 event pairs, 380 based on Foata normal form. 11/3240 useless extension candidates. Maximal degree in co-relation 21446. Up to 2662 conditions per place. [2024-06-04 16:03:18,117 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 132 changer transitions 0/428 dead transitions. [2024-06-04 16:03:18,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 428 transitions, 5947 flow [2024-06-04 16:03:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-04 16:03:18,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-04 16:03:18,118 INFO L175 Difference]: Start difference. First operand has 328 places, 400 transitions, 5033 flow. Second operand 9 states and 206 transitions. [2024-06-04 16:03:18,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 428 transitions, 5947 flow [2024-06-04 16:03:19,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 428 transitions, 5594 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-04 16:03:19,090 INFO L231 Difference]: Finished difference. Result has 326 places, 400 transitions, 4954 flow [2024-06-04 16:03:19,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4954, PETRI_PLACES=326, PETRI_TRANSITIONS=400} [2024-06-04 16:03:19,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-04 16:03:19,091 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 400 transitions, 4954 flow [2024-06-04 16:03:19,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:19,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:19,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:19,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:03:19,091 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:19,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:19,092 INFO L85 PathProgramCache]: Analyzing trace with hash 494128986, now seen corresponding path program 19 times [2024-06-04 16:03:19,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:19,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392425976] [2024-06-04 16:03:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:19,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392425976] [2024-06-04 16:03:19,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392425976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:19,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:19,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777278193] [2024-06-04 16:03:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:19,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:19,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:19,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 400 transitions, 4954 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:19,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:19,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:19,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:20,311 INFO L124 PetriNetUnfolderBase]: 1917/3251 cut-off events. [2024-06-04 16:03:20,312 INFO L125 PetriNetUnfolderBase]: For 194476/194486 co-relation queries the response was YES. [2024-06-04 16:03:20,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21782 conditions, 3251 events. 1917/3251 cut-off events. For 194476/194486 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 19850 event pairs, 380 based on Foata normal form. 11/3262 useless extension candidates. Maximal degree in co-relation 21633. Up to 2598 conditions per place. [2024-06-04 16:03:20,346 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 201 changer transitions 0/444 dead transitions. [2024-06-04 16:03:20,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 444 transitions, 6318 flow [2024-06-04 16:03:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:03:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:03:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 297 transitions. [2024-06-04 16:03:20,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174216027874564 [2024-06-04 16:03:20,348 INFO L175 Difference]: Start difference. First operand has 326 places, 400 transitions, 4954 flow. Second operand 14 states and 297 transitions. [2024-06-04 16:03:20,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 444 transitions, 6318 flow [2024-06-04 16:03:21,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 444 transitions, 6006 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:21,422 INFO L231 Difference]: Finished difference. Result has 330 places, 406 transitions, 5138 flow [2024-06-04 16:03:21,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4646, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5138, PETRI_PLACES=330, PETRI_TRANSITIONS=406} [2024-06-04 16:03:21,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-04 16:03:21,423 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 406 transitions, 5138 flow [2024-06-04 16:03:21,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:21,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:21,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:21,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:03:21,423 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:21,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:21,423 INFO L85 PathProgramCache]: Analyzing trace with hash 833948196, now seen corresponding path program 20 times [2024-06-04 16:03:21,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:21,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966325379] [2024-06-04 16:03:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:21,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:21,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:21,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966325379] [2024-06-04 16:03:21,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966325379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:21,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:21,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:21,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097100359] [2024-06-04 16:03:21,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:21,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:21,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:21,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:21,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:21,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:21,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 406 transitions, 5138 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:21,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:21,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:21,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:22,406 INFO L124 PetriNetUnfolderBase]: 1922/3258 cut-off events. [2024-06-04 16:03:22,406 INFO L125 PetriNetUnfolderBase]: For 194838/194840 co-relation queries the response was YES. [2024-06-04 16:03:22,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21970 conditions, 3258 events. 1922/3258 cut-off events. For 194838/194840 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19911 event pairs, 408 based on Foata normal form. 3/3260 useless extension candidates. Maximal degree in co-relation 21821. Up to 2604 conditions per place. [2024-06-04 16:03:22,449 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 198 changer transitions 0/427 dead transitions. [2024-06-04 16:03:22,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 427 transitions, 6226 flow [2024-06-04 16:03:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-04 16:03:22,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:03:22,450 INFO L175 Difference]: Start difference. First operand has 330 places, 406 transitions, 5138 flow. Second operand 10 states and 210 transitions. [2024-06-04 16:03:22,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 427 transitions, 6226 flow [2024-06-04 16:03:23,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 427 transitions, 5834 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-04 16:03:23,510 INFO L231 Difference]: Finished difference. Result has 328 places, 409 transitions, 5196 flow [2024-06-04 16:03:23,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5196, PETRI_PLACES=328, PETRI_TRANSITIONS=409} [2024-06-04 16:03:23,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-04 16:03:23,510 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 409 transitions, 5196 flow [2024-06-04 16:03:23,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:23,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:23,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:23,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:03:23,511 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:23,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:23,511 INFO L85 PathProgramCache]: Analyzing trace with hash 501480636, now seen corresponding path program 21 times [2024-06-04 16:03:23,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:23,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510655449] [2024-06-04 16:03:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:23,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:23,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:23,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510655449] [2024-06-04 16:03:23,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510655449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:23,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:23,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:23,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204633352] [2024-06-04 16:03:23,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:23,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:23,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:23,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:23,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:23,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:23,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 409 transitions, 5196 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:23,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:23,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:23,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:24,572 INFO L124 PetriNetUnfolderBase]: 1919/3256 cut-off events. [2024-06-04 16:03:24,572 INFO L125 PetriNetUnfolderBase]: For 187188/187198 co-relation queries the response was YES. [2024-06-04 16:03:24,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21780 conditions, 3256 events. 1919/3256 cut-off events. For 187188/187198 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19901 event pairs, 380 based on Foata normal form. 11/3267 useless extension candidates. Maximal degree in co-relation 21632. Up to 2601 conditions per place. [2024-06-04 16:03:24,612 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 203 changer transitions 0/438 dead transitions. [2024-06-04 16:03:24,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 438 transitions, 6288 flow [2024-06-04 16:03:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-04 16:03:24,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-04 16:03:24,613 INFO L175 Difference]: Start difference. First operand has 328 places, 409 transitions, 5196 flow. Second operand 12 states and 254 transitions. [2024-06-04 16:03:24,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 438 transitions, 6288 flow [2024-06-04 16:03:25,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 438 transitions, 5921 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:25,748 INFO L231 Difference]: Finished difference. Result has 333 places, 409 transitions, 5245 flow [2024-06-04 16:03:25,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4829, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5245, PETRI_PLACES=333, PETRI_TRANSITIONS=409} [2024-06-04 16:03:25,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-04 16:03:25,749 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 409 transitions, 5245 flow [2024-06-04 16:03:25,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:25,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:25,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:25,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:03:25,749 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:25,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash 494123406, now seen corresponding path program 22 times [2024-06-04 16:03:25,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:25,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233489017] [2024-06-04 16:03:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:25,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:26,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:26,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233489017] [2024-06-04 16:03:26,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233489017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:26,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:26,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:26,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725198158] [2024-06-04 16:03:26,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:26,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:26,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:26,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:26,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:26,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:26,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 409 transitions, 5245 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:26,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:26,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:26,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:26,788 INFO L124 PetriNetUnfolderBase]: 1916/3252 cut-off events. [2024-06-04 16:03:26,788 INFO L125 PetriNetUnfolderBase]: For 188348/188358 co-relation queries the response was YES. [2024-06-04 16:03:26,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21764 conditions, 3252 events. 1916/3252 cut-off events. For 188348/188358 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19874 event pairs, 380 based on Foata normal form. 11/3263 useless extension candidates. Maximal degree in co-relation 21615. Up to 2598 conditions per place. [2024-06-04 16:03:26,829 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 204 changer transitions 0/443 dead transitions. [2024-06-04 16:03:26,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 443 transitions, 6203 flow [2024-06-04 16:03:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-04 16:03:26,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:03:26,830 INFO L175 Difference]: Start difference. First operand has 333 places, 409 transitions, 5245 flow. Second operand 12 states and 261 transitions. [2024-06-04 16:03:26,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 443 transitions, 6203 flow [2024-06-04 16:03:27,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 443 transitions, 5644 flow, removed 11 selfloop flow, removed 14 redundant places. [2024-06-04 16:03:27,891 INFO L231 Difference]: Finished difference. Result has 331 places, 409 transitions, 5108 flow [2024-06-04 16:03:27,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4686, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5108, PETRI_PLACES=331, PETRI_TRANSITIONS=409} [2024-06-04 16:03:27,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-04 16:03:27,891 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 409 transitions, 5108 flow [2024-06-04 16:03:27,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:27,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:27,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:27,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:03:27,892 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:27,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash -903926842, now seen corresponding path program 23 times [2024-06-04 16:03:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:27,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110422791] [2024-06-04 16:03:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:27,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:28,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:28,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110422791] [2024-06-04 16:03:28,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110422791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:28,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:28,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:03:28,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745146926] [2024-06-04 16:03:28,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:28,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:03:28,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:28,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:03:28,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:03:28,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:28,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 409 transitions, 5108 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:28,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:28,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:28,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:29,032 INFO L124 PetriNetUnfolderBase]: 2082/3543 cut-off events. [2024-06-04 16:03:29,032 INFO L125 PetriNetUnfolderBase]: For 192513/192515 co-relation queries the response was YES. [2024-06-04 16:03:29,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23529 conditions, 3543 events. 2082/3543 cut-off events. For 192513/192515 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 22073 event pairs, 358 based on Foata normal form. 3/3546 useless extension candidates. Maximal degree in co-relation 23380. Up to 2871 conditions per place. [2024-06-04 16:03:29,077 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 356 selfloop transitions, 169 changer transitions 0/531 dead transitions. [2024-06-04 16:03:29,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 531 transitions, 7538 flow [2024-06-04 16:03:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-04 16:03:29,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-04 16:03:29,078 INFO L175 Difference]: Start difference. First operand has 331 places, 409 transitions, 5108 flow. Second operand 12 states and 254 transitions. [2024-06-04 16:03:29,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 531 transitions, 7538 flow [2024-06-04 16:03:30,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 531 transitions, 7014 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-04 16:03:30,133 INFO L231 Difference]: Finished difference. Result has 333 places, 485 transitions, 6129 flow [2024-06-04 16:03:30,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4688, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6129, PETRI_PLACES=333, PETRI_TRANSITIONS=485} [2024-06-04 16:03:30,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-04 16:03:30,134 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 485 transitions, 6129 flow [2024-06-04 16:03:30,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:30,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:30,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:30,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:03:30,134 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:30,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash -376154332, now seen corresponding path program 24 times [2024-06-04 16:03:30,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:30,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92672484] [2024-06-04 16:03:30,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:30,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:30,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:30,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92672484] [2024-06-04 16:03:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92672484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:30,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:30,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:03:30,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590591283] [2024-06-04 16:03:30,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:30,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:03:30,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:03:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:03:30,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:30,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 485 transitions, 6129 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:30,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:30,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:30,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:31,587 INFO L124 PetriNetUnfolderBase]: 2087/3556 cut-off events. [2024-06-04 16:03:31,587 INFO L125 PetriNetUnfolderBase]: For 191922/191932 co-relation queries the response was YES. [2024-06-04 16:03:31,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24023 conditions, 3556 events. 2087/3556 cut-off events. For 191922/191932 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 22244 event pairs, 380 based on Foata normal form. 11/3567 useless extension candidates. Maximal degree in co-relation 23872. Up to 2932 conditions per place. [2024-06-04 16:03:31,625 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 391 selfloop transitions, 121 changer transitions 0/518 dead transitions. [2024-06-04 16:03:31,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 518 transitions, 7438 flow [2024-06-04 16:03:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 16:03:31,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-04 16:03:31,626 INFO L175 Difference]: Start difference. First operand has 333 places, 485 transitions, 6129 flow. Second operand 10 states and 219 transitions. [2024-06-04 16:03:31,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 518 transitions, 7438 flow [2024-06-04 16:03:32,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 518 transitions, 7284 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:32,650 INFO L231 Difference]: Finished difference. Result has 337 places, 488 transitions, 6283 flow [2024-06-04 16:03:32,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5975, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6283, PETRI_PLACES=337, PETRI_TRANSITIONS=488} [2024-06-04 16:03:32,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-04 16:03:32,650 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 488 transitions, 6283 flow [2024-06-04 16:03:32,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:32,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:32,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:32,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:03:32,651 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:32,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash -376143172, now seen corresponding path program 25 times [2024-06-04 16:03:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:32,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807964420] [2024-06-04 16:03:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:32,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:33,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:33,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807964420] [2024-06-04 16:03:33,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807964420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:33,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:33,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:03:33,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698040854] [2024-06-04 16:03:33,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:33,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:03:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:03:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:03:33,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:33,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 488 transitions, 6283 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:33,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:33,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:33,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:33,857 INFO L124 PetriNetUnfolderBase]: 2084/3552 cut-off events. [2024-06-04 16:03:33,857 INFO L125 PetriNetUnfolderBase]: For 193068/193078 co-relation queries the response was YES. [2024-06-04 16:03:33,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24226 conditions, 3552 events. 2084/3552 cut-off events. For 193068/193078 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 22232 event pairs, 380 based on Foata normal form. 11/3563 useless extension candidates. Maximal degree in co-relation 24073. Up to 2929 conditions per place. [2024-06-04 16:03:33,908 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 117 changer transitions 0/512 dead transitions. [2024-06-04 16:03:33,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 512 transitions, 7355 flow [2024-06-04 16:03:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:03:33,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:03:33,909 INFO L175 Difference]: Start difference. First operand has 337 places, 488 transitions, 6283 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:03:33,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 512 transitions, 7355 flow [2024-06-04 16:03:35,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 512 transitions, 6799 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-04 16:03:35,103 INFO L231 Difference]: Finished difference. Result has 334 places, 488 transitions, 5974 flow [2024-06-04 16:03:35,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5727, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5974, PETRI_PLACES=334, PETRI_TRANSITIONS=488} [2024-06-04 16:03:35,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-04 16:03:35,103 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 488 transitions, 5974 flow [2024-06-04 16:03:35,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:35,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:35,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:35,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:03:35,104 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:35,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:35,104 INFO L85 PathProgramCache]: Analyzing trace with hash -363256162, now seen corresponding path program 26 times [2024-06-04 16:03:35,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:35,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992256465] [2024-06-04 16:03:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:35,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:35,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:35,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992256465] [2024-06-04 16:03:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992256465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:35,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:35,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:03:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205025870] [2024-06-04 16:03:35,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:35,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:03:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:03:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:03:35,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:35,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 488 transitions, 5974 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:35,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:35,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:35,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:36,219 INFO L124 PetriNetUnfolderBase]: 2089/3557 cut-off events. [2024-06-04 16:03:36,219 INFO L125 PetriNetUnfolderBase]: For 191287/191289 co-relation queries the response was YES. [2024-06-04 16:03:36,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24089 conditions, 3557 events. 2089/3557 cut-off events. For 191287/191289 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 22222 event pairs, 358 based on Foata normal form. 3/3560 useless extension candidates. Maximal degree in co-relation 23936. Up to 2925 conditions per place. [2024-06-04 16:03:36,267 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 144 changer transitions 0/528 dead transitions. [2024-06-04 16:03:36,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 528 transitions, 7484 flow [2024-06-04 16:03:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:03:36,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:03:36,268 INFO L175 Difference]: Start difference. First operand has 334 places, 488 transitions, 5974 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:03:36,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 528 transitions, 7484 flow [2024-06-04 16:03:37,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 528 transitions, 7224 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:37,251 INFO L231 Difference]: Finished difference. Result has 335 places, 495 transitions, 6209 flow [2024-06-04 16:03:37,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5731, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6209, PETRI_PLACES=335, PETRI_TRANSITIONS=495} [2024-06-04 16:03:37,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-04 16:03:37,251 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 495 transitions, 6209 flow [2024-06-04 16:03:37,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:37,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:37,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:37,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:03:37,252 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:37,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:37,252 INFO L85 PathProgramCache]: Analyzing trace with hash -197022382, now seen corresponding path program 27 times [2024-06-04 16:03:37,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:37,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871025216] [2024-06-04 16:03:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:37,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:37,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:37,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871025216] [2024-06-04 16:03:37,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871025216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:37,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:37,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:03:37,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204985843] [2024-06-04 16:03:37,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:37,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:03:37,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:37,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:03:37,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:03:37,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:37,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 495 transitions, 6209 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:37,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:37,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:37,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:38,470 INFO L124 PetriNetUnfolderBase]: 2094/3566 cut-off events. [2024-06-04 16:03:38,470 INFO L125 PetriNetUnfolderBase]: For 191750/191752 co-relation queries the response was YES. [2024-06-04 16:03:38,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24339 conditions, 3566 events. 2094/3566 cut-off events. For 191750/191752 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 22330 event pairs, 356 based on Foata normal form. 3/3569 useless extension candidates. Maximal degree in co-relation 24185. Up to 2931 conditions per place. [2024-06-04 16:03:38,515 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 373 selfloop transitions, 155 changer transitions 0/534 dead transitions. [2024-06-04 16:03:38,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 534 transitions, 7680 flow [2024-06-04 16:03:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-04 16:03:38,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-04 16:03:38,516 INFO L175 Difference]: Start difference. First operand has 335 places, 495 transitions, 6209 flow. Second operand 11 states and 235 transitions. [2024-06-04 16:03:38,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 534 transitions, 7680 flow [2024-06-04 16:03:39,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 534 transitions, 7453 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:39,689 INFO L231 Difference]: Finished difference. Result has 342 places, 498 transitions, 6362 flow [2024-06-04 16:03:39,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5985, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6362, PETRI_PLACES=342, PETRI_TRANSITIONS=498} [2024-06-04 16:03:39,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-04 16:03:39,690 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 498 transitions, 6362 flow [2024-06-04 16:03:39,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:39,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:39,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:39,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:03:39,690 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:39,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:39,691 INFO L85 PathProgramCache]: Analyzing trace with hash -204374032, now seen corresponding path program 28 times [2024-06-04 16:03:39,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:39,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615354388] [2024-06-04 16:03:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:40,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:40,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615354388] [2024-06-04 16:03:40,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615354388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:40,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:40,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:03:40,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289002352] [2024-06-04 16:03:40,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:40,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:03:40,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:03:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:03:40,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:40,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 498 transitions, 6362 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:40,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:40,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:40,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:40,872 INFO L124 PetriNetUnfolderBase]: 2099/3575 cut-off events. [2024-06-04 16:03:40,872 INFO L125 PetriNetUnfolderBase]: For 196749/196751 co-relation queries the response was YES. [2024-06-04 16:03:40,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24505 conditions, 3575 events. 2099/3575 cut-off events. For 196749/196751 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 22387 event pairs, 356 based on Foata normal form. 3/3578 useless extension candidates. Maximal degree in co-relation 24350. Up to 2937 conditions per place. [2024-06-04 16:03:40,922 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 373 selfloop transitions, 159 changer transitions 0/538 dead transitions. [2024-06-04 16:03:40,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 538 transitions, 7848 flow [2024-06-04 16:03:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-04 16:03:40,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-04 16:03:40,923 INFO L175 Difference]: Start difference. First operand has 342 places, 498 transitions, 6362 flow. Second operand 12 states and 254 transitions. [2024-06-04 16:03:40,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 538 transitions, 7848 flow [2024-06-04 16:03:42,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 538 transitions, 7472 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:42,113 INFO L231 Difference]: Finished difference. Result has 347 places, 502 transitions, 6393 flow [2024-06-04 16:03:42,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6002, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6393, PETRI_PLACES=347, PETRI_TRANSITIONS=502} [2024-06-04 16:03:42,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-04 16:03:42,114 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 502 transitions, 6393 flow [2024-06-04 16:03:42,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:42,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:42,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:42,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:03:42,116 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:42,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash -204379612, now seen corresponding path program 29 times [2024-06-04 16:03:42,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:42,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569427411] [2024-06-04 16:03:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:42,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:42,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569427411] [2024-06-04 16:03:42,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569427411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:42,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:42,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:03:42,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023385381] [2024-06-04 16:03:42,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:42,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:03:42,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:42,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:03:42,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:03:42,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:42,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 502 transitions, 6393 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:42,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:42,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:42,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:43,458 INFO L124 PetriNetUnfolderBase]: 2096/3571 cut-off events. [2024-06-04 16:03:43,459 INFO L125 PetriNetUnfolderBase]: For 197226/197228 co-relation queries the response was YES. [2024-06-04 16:03:43,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24401 conditions, 3571 events. 2096/3571 cut-off events. For 197226/197228 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 22389 event pairs, 356 based on Foata normal form. 3/3574 useless extension candidates. Maximal degree in co-relation 24244. Up to 2934 conditions per place. [2024-06-04 16:03:43,509 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 369 selfloop transitions, 163 changer transitions 0/538 dead transitions. [2024-06-04 16:03:43,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 538 transitions, 7644 flow [2024-06-04 16:03:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:03:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:03:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 268 transitions. [2024-06-04 16:03:43,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028142589118199 [2024-06-04 16:03:43,511 INFO L175 Difference]: Start difference. First operand has 347 places, 502 transitions, 6393 flow. Second operand 13 states and 268 transitions. [2024-06-04 16:03:43,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 538 transitions, 7644 flow [2024-06-04 16:03:44,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 538 transitions, 7336 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:44,350 INFO L231 Difference]: Finished difference. Result has 352 places, 502 transitions, 6417 flow [2024-06-04 16:03:44,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6085, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6417, PETRI_PLACES=352, PETRI_TRANSITIONS=502} [2024-06-04 16:03:44,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-04 16:03:44,351 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 502 transitions, 6417 flow [2024-06-04 16:03:44,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:44,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:44,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:44,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:03:44,352 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:44,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1974098448, now seen corresponding path program 30 times [2024-06-04 16:03:44,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:44,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163549263] [2024-06-04 16:03:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:44,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:44,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:44,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163549263] [2024-06-04 16:03:44,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163549263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:44,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:44,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:44,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543769754] [2024-06-04 16:03:44,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:44,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:44,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:44,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:44,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:44,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:44,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 502 transitions, 6417 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:44,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:44,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:44,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:45,560 INFO L124 PetriNetUnfolderBase]: 2109/3593 cut-off events. [2024-06-04 16:03:45,560 INFO L125 PetriNetUnfolderBase]: For 205529/205531 co-relation queries the response was YES. [2024-06-04 16:03:45,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24714 conditions, 3593 events. 2109/3593 cut-off events. For 205529/205531 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22538 event pairs, 356 based on Foata normal form. 3/3596 useless extension candidates. Maximal degree in co-relation 24556. Up to 3040 conditions per place. [2024-06-04 16:03:45,610 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 433 selfloop transitions, 99 changer transitions 0/538 dead transitions. [2024-06-04 16:03:45,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 538 transitions, 7852 flow [2024-06-04 16:03:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:03:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:03:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-04 16:03:45,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-04 16:03:45,611 INFO L175 Difference]: Start difference. First operand has 352 places, 502 transitions, 6417 flow. Second operand 15 states and 298 transitions. [2024-06-04 16:03:45,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 538 transitions, 7852 flow [2024-06-04 16:03:46,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 538 transitions, 7538 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:46,682 INFO L231 Difference]: Finished difference. Result has 357 places, 508 transitions, 6445 flow [2024-06-04 16:03:46,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6103, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6445, PETRI_PLACES=357, PETRI_TRANSITIONS=508} [2024-06-04 16:03:46,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-04 16:03:46,682 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 508 transitions, 6445 flow [2024-06-04 16:03:46,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:46,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:46,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:46,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:03:46,683 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:46,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:46,683 INFO L85 PathProgramCache]: Analyzing trace with hash -226622668, now seen corresponding path program 31 times [2024-06-04 16:03:46,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:46,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453595296] [2024-06-04 16:03:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:46,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:47,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:47,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453595296] [2024-06-04 16:03:47,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453595296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:47,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:47,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:47,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888259763] [2024-06-04 16:03:47,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:47,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:47,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:47,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:47,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:47,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 508 transitions, 6445 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:47,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:47,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:47,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:47,884 INFO L124 PetriNetUnfolderBase]: 2106/3589 cut-off events. [2024-06-04 16:03:47,885 INFO L125 PetriNetUnfolderBase]: For 208463/208465 co-relation queries the response was YES. [2024-06-04 16:03:47,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24843 conditions, 3589 events. 2106/3589 cut-off events. For 208463/208465 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22523 event pairs, 356 based on Foata normal form. 3/3592 useless extension candidates. Maximal degree in co-relation 24684. Up to 3037 conditions per place. [2024-06-04 16:03:47,933 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 431 selfloop transitions, 99 changer transitions 0/536 dead transitions. [2024-06-04 16:03:47,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 536 transitions, 7574 flow [2024-06-04 16:03:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:03:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:03:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 281 transitions. [2024-06-04 16:03:47,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895470383275261 [2024-06-04 16:03:47,934 INFO L175 Difference]: Start difference. First operand has 357 places, 508 transitions, 6445 flow. Second operand 14 states and 281 transitions. [2024-06-04 16:03:47,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 536 transitions, 7574 flow [2024-06-04 16:03:48,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 536 transitions, 7323 flow, removed 63 selfloop flow, removed 11 redundant places. [2024-06-04 16:03:48,965 INFO L231 Difference]: Finished difference. Result has 360 places, 508 transitions, 6398 flow [2024-06-04 16:03:48,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6398, PETRI_PLACES=360, PETRI_TRANSITIONS=508} [2024-06-04 16:03:48,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-04 16:03:48,965 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 508 transitions, 6398 flow [2024-06-04 16:03:48,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:48,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:48,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:48,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:03:48,966 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:48,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1320336164, now seen corresponding path program 32 times [2024-06-04 16:03:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:48,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836335905] [2024-06-04 16:03:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:48,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:49,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:49,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836335905] [2024-06-04 16:03:49,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836335905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:49,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:49,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:49,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558595334] [2024-06-04 16:03:49,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:49,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:49,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:49,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:49,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:49,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:49,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 508 transitions, 6398 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:49,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:49,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:49,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:50,091 INFO L124 PetriNetUnfolderBase]: 2103/3585 cut-off events. [2024-06-04 16:03:50,092 INFO L125 PetriNetUnfolderBase]: For 208472/208474 co-relation queries the response was YES. [2024-06-04 16:03:50,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24826 conditions, 3585 events. 2103/3585 cut-off events. For 208472/208474 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22471 event pairs, 356 based on Foata normal form. 3/3588 useless extension candidates. Maximal degree in co-relation 24666. Up to 2730 conditions per place. [2024-06-04 16:03:50,142 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 312 changer transitions 0/539 dead transitions. [2024-06-04 16:03:50,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 539 transitions, 7605 flow [2024-06-04 16:03:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:03:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:03:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 285 transitions. [2024-06-04 16:03:50,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965156794425087 [2024-06-04 16:03:50,143 INFO L175 Difference]: Start difference. First operand has 360 places, 508 transitions, 6398 flow. Second operand 14 states and 285 transitions. [2024-06-04 16:03:50,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 539 transitions, 7605 flow [2024-06-04 16:03:51,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 539 transitions, 7407 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-04 16:03:51,215 INFO L231 Difference]: Finished difference. Result has 361 places, 511 transitions, 6908 flow [2024-06-04 16:03:51,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6908, PETRI_PLACES=361, PETRI_TRANSITIONS=511} [2024-06-04 16:03:51,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-04 16:03:51,216 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 511 transitions, 6908 flow [2024-06-04 16:03:51,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:51,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:51,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:51,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:03:51,216 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:51,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1940431753, now seen corresponding path program 1 times [2024-06-04 16:03:51,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:51,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369454418] [2024-06-04 16:03:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:51,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:51,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:51,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369454418] [2024-06-04 16:03:51,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369454418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:51,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:51,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:51,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767685203] [2024-06-04 16:03:51,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:51,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:51,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:51,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:51,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:51,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 511 transitions, 6908 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:51,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:51,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:51,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:52,442 INFO L124 PetriNetUnfolderBase]: 2189/3720 cut-off events. [2024-06-04 16:03:52,442 INFO L125 PetriNetUnfolderBase]: For 283541/283549 co-relation queries the response was YES. [2024-06-04 16:03:52,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27501 conditions, 3720 events. 2189/3720 cut-off events. For 283541/283549 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 23356 event pairs, 320 based on Foata normal form. 14/3727 useless extension candidates. Maximal degree in co-relation 27340. Up to 2108 conditions per place. [2024-06-04 16:03:52,491 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 414 selfloop transitions, 134 changer transitions 0/554 dead transitions. [2024-06-04 16:03:52,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 554 transitions, 8582 flow [2024-06-04 16:03:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:03:52,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:03:52,492 INFO L175 Difference]: Start difference. First operand has 361 places, 511 transitions, 6908 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:03:52,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 554 transitions, 8582 flow [2024-06-04 16:03:53,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 554 transitions, 7896 flow, removed 33 selfloop flow, removed 12 redundant places. [2024-06-04 16:03:53,872 INFO L231 Difference]: Finished difference. Result has 357 places, 514 transitions, 6550 flow [2024-06-04 16:03:53,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6222, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6550, PETRI_PLACES=357, PETRI_TRANSITIONS=514} [2024-06-04 16:03:53,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-04 16:03:53,873 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 514 transitions, 6550 flow [2024-06-04 16:03:53,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:53,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:53,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:53,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:03:53,873 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:53,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash 768729067, now seen corresponding path program 2 times [2024-06-04 16:03:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:53,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74944775] [2024-06-04 16:03:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:53,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:54,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:54,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74944775] [2024-06-04 16:03:54,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74944775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:54,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:54,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:54,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661651653] [2024-06-04 16:03:54,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:54,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:54,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:54,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:54,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:54,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:54,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 514 transitions, 6550 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:54,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:54,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:54,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:55,089 INFO L124 PetriNetUnfolderBase]: 2217/3775 cut-off events. [2024-06-04 16:03:55,090 INFO L125 PetriNetUnfolderBase]: For 286245/286255 co-relation queries the response was YES. [2024-06-04 16:03:55,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27543 conditions, 3775 events. 2217/3775 cut-off events. For 286245/286255 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 23796 event pairs, 292 based on Foata normal form. 16/3791 useless extension candidates. Maximal degree in co-relation 27381. Up to 3068 conditions per place. [2024-06-04 16:03:55,140 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 473 selfloop transitions, 68 changer transitions 0/547 dead transitions. [2024-06-04 16:03:55,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 547 transitions, 7760 flow [2024-06-04 16:03:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:03:55,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:03:55,141 INFO L175 Difference]: Start difference. First operand has 357 places, 514 transitions, 6550 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:03:55,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 547 transitions, 7760 flow [2024-06-04 16:03:56,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 547 transitions, 7598 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:56,811 INFO L231 Difference]: Finished difference. Result has 362 places, 517 transitions, 6566 flow [2024-06-04 16:03:56,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6396, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6566, PETRI_PLACES=362, PETRI_TRANSITIONS=517} [2024-06-04 16:03:56,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-04 16:03:56,812 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 517 transitions, 6566 flow [2024-06-04 16:03:56,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:56,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:56,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:56,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:03:56,812 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:56,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash 768729253, now seen corresponding path program 1 times [2024-06-04 16:03:56,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:56,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569563641] [2024-06-04 16:03:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:57,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:57,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569563641] [2024-06-04 16:03:57,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569563641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:57,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:57,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:57,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732103832] [2024-06-04 16:03:57,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:57,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:57,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:57,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:57,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:57,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 517 transitions, 6566 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:57,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:57,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:57,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:58,033 INFO L124 PetriNetUnfolderBase]: 2329/3955 cut-off events. [2024-06-04 16:03:58,033 INFO L125 PetriNetUnfolderBase]: For 357047/357057 co-relation queries the response was YES. [2024-06-04 16:03:58,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30479 conditions, 3955 events. 2329/3955 cut-off events. For 357047/357057 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 25090 event pairs, 333 based on Foata normal form. 16/3971 useless extension candidates. Maximal degree in co-relation 30315. Up to 2772 conditions per place. [2024-06-04 16:03:58,087 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 430 selfloop transitions, 124 changer transitions 0/560 dead transitions. [2024-06-04 16:03:58,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 560 transitions, 8326 flow [2024-06-04 16:03:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:03:58,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:03:58,088 INFO L175 Difference]: Start difference. First operand has 362 places, 517 transitions, 6566 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:03:58,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 560 transitions, 8326 flow [2024-06-04 16:03:59,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 560 transitions, 8186 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:59,712 INFO L231 Difference]: Finished difference. Result has 367 places, 520 transitions, 6758 flow [2024-06-04 16:03:59,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6426, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6758, PETRI_PLACES=367, PETRI_TRANSITIONS=520} [2024-06-04 16:03:59,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-04 16:03:59,712 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 520 transitions, 6758 flow [2024-06-04 16:03:59,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:59,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:59,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:59,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:03:59,713 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:59,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash 946097923, now seen corresponding path program 2 times [2024-06-04 16:03:59,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:59,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122375523] [2024-06-04 16:03:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:59,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:00,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:00,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122375523] [2024-06-04 16:04:00,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122375523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:00,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:00,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:00,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628657751] [2024-06-04 16:04:00,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:00,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:00,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:00,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:00,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 520 transitions, 6758 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:00,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:00,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:00,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:01,108 INFO L124 PetriNetUnfolderBase]: 2439/4133 cut-off events. [2024-06-04 16:04:01,108 INFO L125 PetriNetUnfolderBase]: For 414664/414674 co-relation queries the response was YES. [2024-06-04 16:04:01,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33120 conditions, 4133 events. 2439/4133 cut-off events. For 414664/414674 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 26414 event pairs, 360 based on Foata normal form. 16/4149 useless extension candidates. Maximal degree in co-relation 32955. Up to 2832 conditions per place. [2024-06-04 16:04:01,157 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 431 selfloop transitions, 128 changer transitions 0/565 dead transitions. [2024-06-04 16:04:01,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 565 transitions, 8552 flow [2024-06-04 16:04:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:04:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:04:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-04 16:04:01,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-04 16:04:01,158 INFO L175 Difference]: Start difference. First operand has 367 places, 520 transitions, 6758 flow. Second operand 10 states and 221 transitions. [2024-06-04 16:04:01,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 565 transitions, 8552 flow [2024-06-04 16:04:02,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 565 transitions, 8415 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:02,971 INFO L231 Difference]: Finished difference. Result has 373 places, 529 transitions, 7034 flow [2024-06-04 16:04:02,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6621, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7034, PETRI_PLACES=373, PETRI_TRANSITIONS=529} [2024-06-04 16:04:02,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-04 16:04:02,971 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 529 transitions, 7034 flow [2024-06-04 16:04:02,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:02,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:02,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:02,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:04:02,972 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:02,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash 945860773, now seen corresponding path program 3 times [2024-06-04 16:04:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:02,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306608439] [2024-06-04 16:04:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:03,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:03,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306608439] [2024-06-04 16:04:03,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306608439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:03,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:03,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:03,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479410082] [2024-06-04 16:04:03,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:03,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:03,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:03,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:03,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 529 transitions, 7034 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:03,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:03,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:03,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:04,230 INFO L124 PetriNetUnfolderBase]: 2426/4118 cut-off events. [2024-06-04 16:04:04,231 INFO L125 PetriNetUnfolderBase]: For 399529/399539 co-relation queries the response was YES. [2024-06-04 16:04:04,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32922 conditions, 4118 events. 2426/4118 cut-off events. For 399529/399539 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 26335 event pairs, 348 based on Foata normal form. 16/4134 useless extension candidates. Maximal degree in co-relation 32754. Up to 2826 conditions per place. [2024-06-04 16:04:04,288 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 436 selfloop transitions, 125 changer transitions 0/567 dead transitions. [2024-06-04 16:04:04,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 567 transitions, 8732 flow [2024-06-04 16:04:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:04:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:04:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-04 16:04:04,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-04 16:04:04,289 INFO L175 Difference]: Start difference. First operand has 373 places, 529 transitions, 7034 flow. Second operand 10 states and 223 transitions. [2024-06-04 16:04:04,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 567 transitions, 8732 flow [2024-06-04 16:04:06,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 567 transitions, 8529 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:06,318 INFO L231 Difference]: Finished difference. Result has 378 places, 529 transitions, 7085 flow [2024-06-04 16:04:06,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6831, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7085, PETRI_PLACES=378, PETRI_TRANSITIONS=529} [2024-06-04 16:04:06,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-04 16:04:06,318 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 529 transitions, 7085 flow [2024-06-04 16:04:06,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:06,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:06,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:06,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:04:06,319 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:06,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1719906387, now seen corresponding path program 3 times [2024-06-04 16:04:06,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:06,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619519605] [2024-06-04 16:04:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:06,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:06,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:06,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619519605] [2024-06-04 16:04:06,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619519605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:06,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:06,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:06,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062665674] [2024-06-04 16:04:06,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:06,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:06,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:06,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:06,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:06,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:06,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 529 transitions, 7085 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:06,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:06,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:06,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:07,625 INFO L124 PetriNetUnfolderBase]: 2479/4207 cut-off events. [2024-06-04 16:04:07,625 INFO L125 PetriNetUnfolderBase]: For 434216/434226 co-relation queries the response was YES. [2024-06-04 16:04:07,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34058 conditions, 4207 events. 2479/4207 cut-off events. For 434216/434226 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 26974 event pairs, 340 based on Foata normal form. 16/4223 useless extension candidates. Maximal degree in co-relation 33889. Up to 3397 conditions per place. [2024-06-04 16:04:07,690 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 481 selfloop transitions, 76 changer transitions 0/563 dead transitions. [2024-06-04 16:04:07,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 563 transitions, 8529 flow [2024-06-04 16:04:07,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-04 16:04:07,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-04 16:04:07,691 INFO L175 Difference]: Start difference. First operand has 378 places, 529 transitions, 7085 flow. Second operand 9 states and 196 transitions. [2024-06-04 16:04:07,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 563 transitions, 8529 flow [2024-06-04 16:04:09,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 563 transitions, 8344 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:09,568 INFO L231 Difference]: Finished difference. Result has 383 places, 531 transitions, 7099 flow [2024-06-04 16:04:09,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6900, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7099, PETRI_PLACES=383, PETRI_TRANSITIONS=531} [2024-06-04 16:04:09,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-04 16:04:09,568 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 531 transitions, 7099 flow [2024-06-04 16:04:09,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:09,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:09,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:09,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:04:09,569 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:09,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:09,569 INFO L85 PathProgramCache]: Analyzing trace with hash -19041463, now seen corresponding path program 4 times [2024-06-04 16:04:09,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:09,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091046199] [2024-06-04 16:04:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:09,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:09,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:09,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091046199] [2024-06-04 16:04:09,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091046199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:09,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:09,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:09,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075325430] [2024-06-04 16:04:09,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:09,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:09,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:09,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:09,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:10,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:10,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 531 transitions, 7099 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:10,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:10,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:10,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:10,908 INFO L124 PetriNetUnfolderBase]: 2611/4411 cut-off events. [2024-06-04 16:04:10,908 INFO L125 PetriNetUnfolderBase]: For 533794/533802 co-relation queries the response was YES. [2024-06-04 16:04:10,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37389 conditions, 4411 events. 2611/4411 cut-off events. For 533794/533802 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28404 event pairs, 555 based on Foata normal form. 14/4417 useless extension candidates. Maximal degree in co-relation 37218. Up to 3321 conditions per place. [2024-06-04 16:04:10,980 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 437 selfloop transitions, 131 changer transitions 0/574 dead transitions. [2024-06-04 16:04:10,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 574 transitions, 8862 flow [2024-06-04 16:04:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:10,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:04:10,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:04:10,981 INFO L175 Difference]: Start difference. First operand has 383 places, 531 transitions, 7099 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:04:10,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 574 transitions, 8862 flow [2024-06-04 16:04:14,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 574 transitions, 8634 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:14,062 INFO L231 Difference]: Finished difference. Result has 384 places, 535 transitions, 7228 flow [2024-06-04 16:04:14,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6876, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7228, PETRI_PLACES=384, PETRI_TRANSITIONS=535} [2024-06-04 16:04:14,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-04 16:04:14,063 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 535 transitions, 7228 flow [2024-06-04 16:04:14,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:14,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:14,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:14,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:04:14,064 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:14,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash 123061607, now seen corresponding path program 5 times [2024-06-04 16:04:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:14,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667947739] [2024-06-04 16:04:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:14,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:14,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667947739] [2024-06-04 16:04:14,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667947739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:14,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:14,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:14,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315615257] [2024-06-04 16:04:14,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:14,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:14,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:14,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:14,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:14,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 535 transitions, 7228 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:14,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:14,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:14,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:15,374 INFO L124 PetriNetUnfolderBase]: 2639/4454 cut-off events. [2024-06-04 16:04:15,375 INFO L125 PetriNetUnfolderBase]: For 553174/553182 co-relation queries the response was YES. [2024-06-04 16:04:15,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37806 conditions, 4454 events. 2639/4454 cut-off events. For 553174/553182 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 28727 event pairs, 597 based on Foata normal form. 16/4467 useless extension candidates. Maximal degree in co-relation 37635. Up to 3548 conditions per place. [2024-06-04 16:04:15,439 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 128 changer transitions 0/572 dead transitions. [2024-06-04 16:04:15,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 572 transitions, 8746 flow [2024-06-04 16:04:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:04:15,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-04 16:04:15,441 INFO L175 Difference]: Start difference. First operand has 384 places, 535 transitions, 7228 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:04:15,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 572 transitions, 8746 flow [2024-06-04 16:04:18,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 572 transitions, 8593 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:04:18,159 INFO L231 Difference]: Finished difference. Result has 389 places, 536 transitions, 7357 flow [2024-06-04 16:04:18,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7077, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7357, PETRI_PLACES=389, PETRI_TRANSITIONS=536} [2024-06-04 16:04:18,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-04 16:04:18,160 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 536 transitions, 7357 flow [2024-06-04 16:04:18,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:18,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:18,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:18,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:04:18,160 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:18,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:18,161 INFO L85 PathProgramCache]: Analyzing trace with hash -18921307, now seen corresponding path program 4 times [2024-06-04 16:04:18,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:18,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656750814] [2024-06-04 16:04:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:18,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:18,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:18,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656750814] [2024-06-04 16:04:18,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656750814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:18,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:18,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:18,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492340201] [2024-06-04 16:04:18,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:18,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:18,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:18,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:18,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:18,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:18,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 536 transitions, 7357 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:18,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:18,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:18,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:19,606 INFO L124 PetriNetUnfolderBase]: 2705/4566 cut-off events. [2024-06-04 16:04:19,606 INFO L125 PetriNetUnfolderBase]: For 590589/590599 co-relation queries the response was YES. [2024-06-04 16:04:19,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39750 conditions, 4566 events. 2705/4566 cut-off events. For 590589/590599 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 29608 event pairs, 597 based on Foata normal form. 16/4573 useless extension candidates. Maximal degree in co-relation 39577. Up to 3818 conditions per place. [2024-06-04 16:04:19,675 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 453 selfloop transitions, 115 changer transitions 0/574 dead transitions. [2024-06-04 16:04:19,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 574 transitions, 8898 flow [2024-06-04 16:04:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-04 16:04:19,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254988913525499 [2024-06-04 16:04:19,676 INFO L175 Difference]: Start difference. First operand has 389 places, 536 transitions, 7357 flow. Second operand 11 states and 237 transitions. [2024-06-04 16:04:19,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 574 transitions, 8898 flow [2024-06-04 16:04:22,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 574 transitions, 8627 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:22,865 INFO L231 Difference]: Finished difference. Result has 395 places, 538 transitions, 7399 flow [2024-06-04 16:04:22,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7086, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7399, PETRI_PLACES=395, PETRI_TRANSITIONS=538} [2024-06-04 16:04:22,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-04 16:04:22,865 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 538 transitions, 7399 flow [2024-06-04 16:04:22,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:22,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:22,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:22,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:04:22,866 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:22,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:22,867 INFO L85 PathProgramCache]: Analyzing trace with hash -18921493, now seen corresponding path program 6 times [2024-06-04 16:04:22,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:22,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002338467] [2024-06-04 16:04:22,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:22,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:23,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002338467] [2024-06-04 16:04:23,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002338467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:23,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:23,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:23,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612407055] [2024-06-04 16:04:23,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:23,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:23,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:23,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:23,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 538 transitions, 7399 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:23,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:23,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:23,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:24,266 INFO L124 PetriNetUnfolderBase]: 2692/4541 cut-off events. [2024-06-04 16:04:24,266 INFO L125 PetriNetUnfolderBase]: For 576864/576874 co-relation queries the response was YES. [2024-06-04 16:04:24,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39137 conditions, 4541 events. 2692/4541 cut-off events. For 576864/576874 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 29416 event pairs, 586 based on Foata normal form. 16/4546 useless extension candidates. Maximal degree in co-relation 38962. Up to 3937 conditions per place. [2024-06-04 16:04:24,485 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 503 selfloop transitions, 58 changer transitions 0/567 dead transitions. [2024-06-04 16:04:24,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 567 transitions, 8611 flow [2024-06-04 16:04:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:04:24,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-04 16:04:24,488 INFO L175 Difference]: Start difference. First operand has 395 places, 538 transitions, 7399 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:04:24,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 567 transitions, 8611 flow [2024-06-04 16:04:27,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 567 transitions, 8398 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:27,323 INFO L231 Difference]: Finished difference. Result has 396 places, 538 transitions, 7306 flow [2024-06-04 16:04:27,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7306, PETRI_PLACES=396, PETRI_TRANSITIONS=538} [2024-06-04 16:04:27,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-04 16:04:27,324 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 538 transitions, 7306 flow [2024-06-04 16:04:27,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:27,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:27,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:27,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:04:27,324 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:27,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:27,325 INFO L85 PathProgramCache]: Analyzing trace with hash 131632487, now seen corresponding path program 7 times [2024-06-04 16:04:27,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:27,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382267975] [2024-06-04 16:04:27,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:27,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:27,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:27,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382267975] [2024-06-04 16:04:27,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382267975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:27,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:27,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:27,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974409348] [2024-06-04 16:04:27,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:27,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:27,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:27,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:27,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:27,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:27,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 538 transitions, 7306 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:27,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:27,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:27,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:28,687 INFO L124 PetriNetUnfolderBase]: 2720/4595 cut-off events. [2024-06-04 16:04:28,687 INFO L125 PetriNetUnfolderBase]: For 596399/596407 co-relation queries the response was YES. [2024-06-04 16:04:28,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39439 conditions, 4595 events. 2720/4595 cut-off events. For 596399/596407 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 29910 event pairs, 632 based on Foata normal form. 16/4610 useless extension candidates. Maximal degree in co-relation 39263. Up to 3841 conditions per place. [2024-06-04 16:04:28,754 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 434 selfloop transitions, 127 changer transitions 0/567 dead transitions. [2024-06-04 16:04:28,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 567 transitions, 8560 flow [2024-06-04 16:04:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:04:28,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:04:28,755 INFO L175 Difference]: Start difference. First operand has 396 places, 538 transitions, 7306 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:04:28,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 567 transitions, 8560 flow [2024-06-04 16:04:31,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 567 transitions, 8439 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:31,768 INFO L231 Difference]: Finished difference. Result has 398 places, 539 transitions, 7464 flow [2024-06-04 16:04:31,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7185, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7464, PETRI_PLACES=398, PETRI_TRANSITIONS=539} [2024-06-04 16:04:31,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-04 16:04:31,768 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 539 transitions, 7464 flow [2024-06-04 16:04:31,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:31,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:31,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:04:31,769 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:31,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1717953483, now seen corresponding path program 5 times [2024-06-04 16:04:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:31,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321877853] [2024-06-04 16:04:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:32,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:32,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321877853] [2024-06-04 16:04:32,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321877853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:32,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:32,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:32,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139784410] [2024-06-04 16:04:32,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:32,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:32,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:32,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:32,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:32,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:32,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 539 transitions, 7464 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:32,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:32,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:32,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:33,236 INFO L124 PetriNetUnfolderBase]: 2748/4636 cut-off events. [2024-06-04 16:04:33,236 INFO L125 PetriNetUnfolderBase]: For 609480/609490 co-relation queries the response was YES. [2024-06-04 16:04:33,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40145 conditions, 4636 events. 2748/4636 cut-off events. For 609480/609490 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 30130 event pairs, 613 based on Foata normal form. 18/4654 useless extension candidates. Maximal degree in co-relation 39968. Up to 3989 conditions per place. [2024-06-04 16:04:33,316 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 110 changer transitions 0/568 dead transitions. [2024-06-04 16:04:33,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 568 transitions, 8737 flow [2024-06-04 16:04:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-04 16:04:33,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-04 16:04:33,317 INFO L175 Difference]: Start difference. First operand has 398 places, 539 transitions, 7464 flow. Second operand 11 states and 230 transitions. [2024-06-04 16:04:33,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 568 transitions, 8737 flow [2024-06-04 16:04:36,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 568 transitions, 8482 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:36,793 INFO L231 Difference]: Finished difference. Result has 403 places, 540 transitions, 7467 flow [2024-06-04 16:04:36,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7209, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7467, PETRI_PLACES=403, PETRI_TRANSITIONS=540} [2024-06-04 16:04:36,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-04 16:04:36,793 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 540 transitions, 7467 flow [2024-06-04 16:04:36,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:36,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:36,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:36,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:04:36,794 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:36,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash 246775973, now seen corresponding path program 6 times [2024-06-04 16:04:36,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:36,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710106711] [2024-06-04 16:04:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:36,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:37,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:37,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710106711] [2024-06-04 16:04:37,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710106711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:37,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:37,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:37,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673273871] [2024-06-04 16:04:37,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:37,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:37,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:37,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:37,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:37,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 540 transitions, 7467 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:37,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:37,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:37,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:38,273 INFO L124 PetriNetUnfolderBase]: 2776/4686 cut-off events. [2024-06-04 16:04:38,273 INFO L125 PetriNetUnfolderBase]: For 613818/613828 co-relation queries the response was YES. [2024-06-04 16:04:38,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40556 conditions, 4686 events. 2776/4686 cut-off events. For 613818/613828 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30545 event pairs, 611 based on Foata normal form. 16/4700 useless extension candidates. Maximal degree in co-relation 40378. Up to 4003 conditions per place. [2024-06-04 16:04:38,339 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 456 selfloop transitions, 113 changer transitions 0/575 dead transitions. [2024-06-04 16:04:38,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 575 transitions, 8814 flow [2024-06-04 16:04:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:04:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:04:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-04 16:04:38,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-04 16:04:38,340 INFO L175 Difference]: Start difference. First operand has 403 places, 540 transitions, 7467 flow. Second operand 12 states and 249 transitions. [2024-06-04 16:04:38,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 575 transitions, 8814 flow [2024-06-04 16:04:41,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 575 transitions, 8587 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:41,478 INFO L231 Difference]: Finished difference. Result has 407 places, 543 transitions, 7539 flow [2024-06-04 16:04:41,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7240, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7539, PETRI_PLACES=407, PETRI_TRANSITIONS=543} [2024-06-04 16:04:41,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-04 16:04:41,478 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 543 transitions, 7539 flow [2024-06-04 16:04:41,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:41,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:41,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:41,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:04:41,479 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:41,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash 246775787, now seen corresponding path program 8 times [2024-06-04 16:04:41,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:41,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813648928] [2024-06-04 16:04:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:41,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:41,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813648928] [2024-06-04 16:04:41,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813648928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:41,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:41,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:41,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908135995] [2024-06-04 16:04:41,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:41,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:41,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:41,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:41,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 543 transitions, 7539 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:41,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:41,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:41,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:42,934 INFO L124 PetriNetUnfolderBase]: 2842/4792 cut-off events. [2024-06-04 16:04:42,934 INFO L125 PetriNetUnfolderBase]: For 666873/666883 co-relation queries the response was YES. [2024-06-04 16:04:42,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42184 conditions, 4792 events. 2842/4792 cut-off events. For 666873/666883 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31362 event pairs, 629 based on Foata normal form. 16/4806 useless extension candidates. Maximal degree in co-relation 42004. Up to 4148 conditions per place. [2024-06-04 16:04:43,007 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 510 selfloop transitions, 59 changer transitions 0/575 dead transitions. [2024-06-04 16:04:43,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 575 transitions, 9050 flow [2024-06-04 16:04:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-04 16:04:43,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-04 16:04:43,008 INFO L175 Difference]: Start difference. First operand has 407 places, 543 transitions, 7539 flow. Second operand 9 states and 196 transitions. [2024-06-04 16:04:43,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 575 transitions, 9050 flow [2024-06-04 16:04:46,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 575 transitions, 8816 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:46,806 INFO L231 Difference]: Finished difference. Result has 408 places, 545 transitions, 7476 flow [2024-06-04 16:04:46,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7305, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7476, PETRI_PLACES=408, PETRI_TRANSITIONS=545} [2024-06-04 16:04:46,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-04 16:04:46,806 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 545 transitions, 7476 flow [2024-06-04 16:04:46,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:46,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:46,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:46,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:04:46,806 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:46,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:46,807 INFO L85 PathProgramCache]: Analyzing trace with hash 246923657, now seen corresponding path program 9 times [2024-06-04 16:04:46,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:46,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583318273] [2024-06-04 16:04:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:46,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:47,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:47,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583318273] [2024-06-04 16:04:47,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583318273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:47,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:47,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:47,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476949768] [2024-06-04 16:04:47,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:47,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:47,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:47,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:47,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:47,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 545 transitions, 7476 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:47,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:47,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:47,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:48,211 INFO L124 PetriNetUnfolderBase]: 2824/4760 cut-off events. [2024-06-04 16:04:48,212 INFO L125 PetriNetUnfolderBase]: For 648353/648363 co-relation queries the response was YES. [2024-06-04 16:04:48,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41220 conditions, 4760 events. 2824/4760 cut-off events. For 648353/648363 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31078 event pairs, 627 based on Foata normal form. 18/4778 useless extension candidates. Maximal degree in co-relation 41038. Up to 4170 conditions per place. [2024-06-04 16:04:48,288 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 508 selfloop transitions, 56 changer transitions 0/570 dead transitions. [2024-06-04 16:04:48,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 570 transitions, 8710 flow [2024-06-04 16:04:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-04 16:04:48,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:04:48,289 INFO L175 Difference]: Start difference. First operand has 408 places, 545 transitions, 7476 flow. Second operand 8 states and 176 transitions. [2024-06-04 16:04:48,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 570 transitions, 8710 flow [2024-06-04 16:04:51,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 570 transitions, 8586 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:51,299 INFO L231 Difference]: Finished difference. Result has 410 places, 545 transitions, 7469 flow [2024-06-04 16:04:51,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7469, PETRI_PLACES=410, PETRI_TRANSITIONS=545} [2024-06-04 16:04:51,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-04 16:04:51,300 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 545 transitions, 7469 flow [2024-06-04 16:04:51,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:51,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:51,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:51,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:04:51,300 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:51,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1100297567, now seen corresponding path program 7 times [2024-06-04 16:04:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:51,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161225510] [2024-06-04 16:04:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:51,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:51,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:51,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161225510] [2024-06-04 16:04:51,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161225510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:51,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:51,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:51,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125313283] [2024-06-04 16:04:51,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:51,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:51,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:51,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:51,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 545 transitions, 7469 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:51,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:51,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:51,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:52,972 INFO L124 PetriNetUnfolderBase]: 2852/4808 cut-off events. [2024-06-04 16:04:52,972 INFO L125 PetriNetUnfolderBase]: For 661245/661255 co-relation queries the response was YES. [2024-06-04 16:04:53,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41695 conditions, 4808 events. 2852/4808 cut-off events. For 661245/661255 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 31487 event pairs, 633 based on Foata normal form. 18/4826 useless extension candidates. Maximal degree in co-relation 41512. Up to 4153 conditions per place. [2024-06-04 16:04:53,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 457 selfloop transitions, 107 changer transitions 0/570 dead transitions. [2024-06-04 16:04:53,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 570 transitions, 8740 flow [2024-06-04 16:04:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:04:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:04:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-04 16:04:53,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-04 16:04:53,053 INFO L175 Difference]: Start difference. First operand has 410 places, 545 transitions, 7469 flow. Second operand 10 states and 211 transitions. [2024-06-04 16:04:53,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 570 transitions, 8740 flow [2024-06-04 16:04:56,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 570 transitions, 8631 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:56,237 INFO L231 Difference]: Finished difference. Result has 414 places, 546 transitions, 7616 flow [2024-06-04 16:04:56,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7360, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7616, PETRI_PLACES=414, PETRI_TRANSITIONS=546} [2024-06-04 16:04:56,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-04 16:04:56,238 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 546 transitions, 7616 flow [2024-06-04 16:04:56,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:56,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:56,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:56,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:04:56,238 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:56,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:56,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1465143417, now seen corresponding path program 8 times [2024-06-04 16:04:56,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:56,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606626670] [2024-06-04 16:04:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:56,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:56,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:56,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606626670] [2024-06-04 16:04:56,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606626670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:56,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:56,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:56,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000725882] [2024-06-04 16:04:56,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:56,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:56,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:56,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:56,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:56,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:56,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 546 transitions, 7616 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:56,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:56,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:56,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:57,734 INFO L124 PetriNetUnfolderBase]: 2880/4852 cut-off events. [2024-06-04 16:04:57,734 INFO L125 PetriNetUnfolderBase]: For 676263/676273 co-relation queries the response was YES. [2024-06-04 16:04:57,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42419 conditions, 4852 events. 2880/4852 cut-off events. For 676263/676273 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31815 event pairs, 637 based on Foata normal form. 18/4870 useless extension candidates. Maximal degree in co-relation 42235. Up to 4197 conditions per place. [2024-06-04 16:04:57,976 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 459 selfloop transitions, 108 changer transitions 0/573 dead transitions. [2024-06-04 16:04:57,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 573 transitions, 8899 flow [2024-06-04 16:04:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:04:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:04:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-04 16:04:57,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49796747967479676 [2024-06-04 16:04:57,977 INFO L175 Difference]: Start difference. First operand has 414 places, 546 transitions, 7616 flow. Second operand 12 states and 245 transitions. [2024-06-04 16:04:57,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 573 transitions, 8899 flow [2024-06-04 16:05:01,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 573 transitions, 8674 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:05:01,554 INFO L231 Difference]: Finished difference. Result has 418 places, 547 transitions, 7651 flow [2024-06-04 16:05:01,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7391, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7651, PETRI_PLACES=418, PETRI_TRANSITIONS=547} [2024-06-04 16:05:01,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-04 16:05:01,554 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 547 transitions, 7651 flow [2024-06-04 16:05:01,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:01,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:01,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:01,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 16:05:01,555 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:01,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1328377463, now seen corresponding path program 10 times [2024-06-04 16:05:01,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:01,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130935015] [2024-06-04 16:05:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:01,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:01,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130935015] [2024-06-04 16:05:01,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130935015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:01,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:01,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:01,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915783079] [2024-06-04 16:05:01,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:01,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:01,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:01,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:01,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 547 transitions, 7651 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:01,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:01,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:01,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:03,061 INFO L124 PetriNetUnfolderBase]: 2908/4900 cut-off events. [2024-06-04 16:05:03,061 INFO L125 PetriNetUnfolderBase]: For 689722/689732 co-relation queries the response was YES. [2024-06-04 16:05:03,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42810 conditions, 4900 events. 2908/4900 cut-off events. For 689722/689732 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32246 event pairs, 641 based on Foata normal form. 18/4918 useless extension candidates. Maximal degree in co-relation 42625. Up to 4293 conditions per place. [2024-06-04 16:05:03,139 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 500 selfloop transitions, 65 changer transitions 0/571 dead transitions. [2024-06-04 16:05:03,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 571 transitions, 8903 flow [2024-06-04 16:05:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 16:05:03,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-04 16:05:03,141 INFO L175 Difference]: Start difference. First operand has 418 places, 547 transitions, 7651 flow. Second operand 9 states and 190 transitions. [2024-06-04 16:05:03,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 571 transitions, 8903 flow [2024-06-04 16:05:06,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 571 transitions, 8674 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-04 16:05:06,762 INFO L231 Difference]: Finished difference. Result has 417 places, 548 transitions, 7581 flow [2024-06-04 16:05:06,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7581, PETRI_PLACES=417, PETRI_TRANSITIONS=548} [2024-06-04 16:05:06,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-04 16:05:06,762 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 548 transitions, 7581 flow [2024-06-04 16:05:06,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:06,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:06,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:06,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 16:05:06,763 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:06,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:06,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1417090907, now seen corresponding path program 9 times [2024-06-04 16:05:06,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:06,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944826299] [2024-06-04 16:05:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:06,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:07,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:07,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944826299] [2024-06-04 16:05:07,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944826299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:07,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:07,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:07,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981970223] [2024-06-04 16:05:07,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:07,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:07,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:07,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 548 transitions, 7581 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:07,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:07,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:07,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:08,358 INFO L124 PetriNetUnfolderBase]: 3077/5153 cut-off events. [2024-06-04 16:05:08,358 INFO L125 PetriNetUnfolderBase]: For 814541/814551 co-relation queries the response was YES. [2024-06-04 16:05:08,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47233 conditions, 5153 events. 3077/5153 cut-off events. For 814541/814551 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 33911 event pairs, 658 based on Foata normal form. 16/5163 useless extension candidates. Maximal degree in co-relation 47047. Up to 4129 conditions per place. [2024-06-04 16:05:08,437 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 465 selfloop transitions, 121 changer transitions 0/592 dead transitions. [2024-06-04 16:05:08,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 592 transitions, 9571 flow [2024-06-04 16:05:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:05:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:05:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-04 16:05:08,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-04 16:05:08,439 INFO L175 Difference]: Start difference. First operand has 417 places, 548 transitions, 7581 flow. Second operand 11 states and 236 transitions. [2024-06-04 16:05:08,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 592 transitions, 9571 flow [2024-06-04 16:05:12,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 592 transitions, 9436 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:12,457 INFO L231 Difference]: Finished difference. Result has 423 places, 556 transitions, 7916 flow [2024-06-04 16:05:12,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7916, PETRI_PLACES=423, PETRI_TRANSITIONS=556} [2024-06-04 16:05:12,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-04 16:05:12,458 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 556 transitions, 7916 flow [2024-06-04 16:05:12,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:12,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:12,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:12,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 16:05:12,458 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:12,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash 139780289, now seen corresponding path program 11 times [2024-06-04 16:05:12,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:12,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358003436] [2024-06-04 16:05:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:12,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:12,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358003436] [2024-06-04 16:05:12,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358003436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:12,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:12,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642907668] [2024-06-04 16:05:12,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:12,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:12,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:12,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:12,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:12,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:12,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 556 transitions, 7916 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:12,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:12,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:12,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:14,202 INFO L124 PetriNetUnfolderBase]: 3176/5318 cut-off events. [2024-06-04 16:05:14,202 INFO L125 PetriNetUnfolderBase]: For 913730/913740 co-relation queries the response was YES. [2024-06-04 16:05:14,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50388 conditions, 5318 events. 3176/5318 cut-off events. For 913730/913740 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35237 event pairs, 713 based on Foata normal form. 16/5324 useless extension candidates. Maximal degree in co-relation 50199. Up to 4496 conditions per place. [2024-06-04 16:05:14,281 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 507 selfloop transitions, 76 changer transitions 0/589 dead transitions. [2024-06-04 16:05:14,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 589 transitions, 9504 flow [2024-06-04 16:05:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-04 16:05:14,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-04 16:05:14,282 INFO L175 Difference]: Start difference. First operand has 423 places, 556 transitions, 7916 flow. Second operand 9 states and 194 transitions. [2024-06-04 16:05:14,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 589 transitions, 9504 flow [2024-06-04 16:05:18,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 589 transitions, 9358 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:18,956 INFO L231 Difference]: Finished difference. Result has 427 places, 561 transitions, 8041 flow [2024-06-04 16:05:18,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7770, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8041, PETRI_PLACES=427, PETRI_TRANSITIONS=561} [2024-06-04 16:05:18,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-04 16:05:18,957 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 561 transitions, 8041 flow [2024-06-04 16:05:18,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:18,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:18,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:18,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 16:05:18,958 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:18,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:18,958 INFO L85 PathProgramCache]: Analyzing trace with hash -523489759, now seen corresponding path program 10 times [2024-06-04 16:05:18,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:18,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886109550] [2024-06-04 16:05:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:18,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:19,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:19,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886109550] [2024-06-04 16:05:19,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886109550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:19,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:19,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:19,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813980093] [2024-06-04 16:05:19,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:19,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:19,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:19,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:19,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 561 transitions, 8041 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:19,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:19,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:19,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:20,654 INFO L124 PetriNetUnfolderBase]: 3229/5403 cut-off events. [2024-06-04 16:05:20,655 INFO L125 PetriNetUnfolderBase]: For 963249/963259 co-relation queries the response was YES. [2024-06-04 16:05:20,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52278 conditions, 5403 events. 3229/5403 cut-off events. For 963249/963259 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35822 event pairs, 698 based on Foata normal form. 16/5411 useless extension candidates. Maximal degree in co-relation 52086. Up to 4312 conditions per place. [2024-06-04 16:05:20,742 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 465 selfloop transitions, 125 changer transitions 0/596 dead transitions. [2024-06-04 16:05:20,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 596 transitions, 9889 flow [2024-06-04 16:05:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:05:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:05:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-04 16:05:20,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-04 16:05:20,743 INFO L175 Difference]: Start difference. First operand has 427 places, 561 transitions, 8041 flow. Second operand 11 states and 235 transitions. [2024-06-04 16:05:20,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 596 transitions, 9889 flow [2024-06-04 16:05:25,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 596 transitions, 9751 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:05:25,261 INFO L231 Difference]: Finished difference. Result has 433 places, 563 transitions, 8223 flow [2024-06-04 16:05:25,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7903, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8223, PETRI_PLACES=433, PETRI_TRANSITIONS=563} [2024-06-04 16:05:25,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-04 16:05:25,262 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 563 transitions, 8223 flow [2024-06-04 16:05:25,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:25,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:25,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:25,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 16:05:25,263 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:25,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1328525147, now seen corresponding path program 11 times [2024-06-04 16:05:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:25,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921596095] [2024-06-04 16:05:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:25,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:25,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921596095] [2024-06-04 16:05:25,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921596095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:25,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:25,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:25,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561072456] [2024-06-04 16:05:25,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:25,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:25,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:25,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 563 transitions, 8223 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:25,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:25,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:25,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:26,886 INFO L124 PetriNetUnfolderBase]: 3216/5386 cut-off events. [2024-06-04 16:05:26,886 INFO L125 PetriNetUnfolderBase]: For 948299/948309 co-relation queries the response was YES. [2024-06-04 16:05:26,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51723 conditions, 5386 events. 3216/5386 cut-off events. For 948299/948309 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35781 event pairs, 739 based on Foata normal form. 16/5400 useless extension candidates. Maximal degree in co-relation 51530. Up to 4655 conditions per place. [2024-06-04 16:05:26,971 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 474 selfloop transitions, 112 changer transitions 0/592 dead transitions. [2024-06-04 16:05:26,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 592 transitions, 9539 flow [2024-06-04 16:05:26,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-04 16:05:26,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-04 16:05:26,972 INFO L175 Difference]: Start difference. First operand has 433 places, 563 transitions, 8223 flow. Second operand 12 states and 247 transitions. [2024-06-04 16:05:26,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 592 transitions, 9539 flow [2024-06-04 16:05:31,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 592 transitions, 9312 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:31,537 INFO L231 Difference]: Finished difference. Result has 438 places, 563 transitions, 8224 flow [2024-06-04 16:05:31,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7996, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8224, PETRI_PLACES=438, PETRI_TRANSITIONS=563} [2024-06-04 16:05:31,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-04 16:05:31,538 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 563 transitions, 8224 flow [2024-06-04 16:05:31,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:31,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:31,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:31,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 16:05:31,539 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:31,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1328525333, now seen corresponding path program 12 times [2024-06-04 16:05:31,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:31,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122690750] [2024-06-04 16:05:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:31,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:32,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:32,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122690750] [2024-06-04 16:05:32,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122690750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:32,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:32,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:32,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914186025] [2024-06-04 16:05:32,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:32,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:32,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:32,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:32,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:32,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:32,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 563 transitions, 8224 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:32,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:32,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:32,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:33,273 INFO L124 PetriNetUnfolderBase]: 3203/5367 cut-off events. [2024-06-04 16:05:33,273 INFO L125 PetriNetUnfolderBase]: For 929947/929957 co-relation queries the response was YES. [2024-06-04 16:05:33,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50898 conditions, 5367 events. 3203/5367 cut-off events. For 929947/929957 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35686 event pairs, 732 based on Foata normal form. 16/5381 useless extension candidates. Maximal degree in co-relation 50704. Up to 4720 conditions per place. [2024-06-04 16:05:33,358 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 516 selfloop transitions, 68 changer transitions 0/590 dead transitions. [2024-06-04 16:05:33,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 590 transitions, 9520 flow [2024-06-04 16:05:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:05:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:05:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-04 16:05:33,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-04 16:05:33,359 INFO L175 Difference]: Start difference. First operand has 438 places, 563 transitions, 8224 flow. Second operand 10 states and 209 transitions. [2024-06-04 16:05:33,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 590 transitions, 9520 flow [2024-06-04 16:05:37,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 590 transitions, 9287 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-04 16:05:37,857 INFO L231 Difference]: Finished difference. Result has 439 places, 563 transitions, 8131 flow [2024-06-04 16:05:37,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7991, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8131, PETRI_PLACES=439, PETRI_TRANSITIONS=563} [2024-06-04 16:05:37,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-04 16:05:37,857 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 563 transitions, 8131 flow [2024-06-04 16:05:37,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:37,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:37,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:37,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 16:05:37,858 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:37,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:37,858 INFO L85 PathProgramCache]: Analyzing trace with hash -514552459, now seen corresponding path program 12 times [2024-06-04 16:05:37,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:37,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64068929] [2024-06-04 16:05:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:38,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:38,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64068929] [2024-06-04 16:05:38,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64068929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:38,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:38,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:38,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174363586] [2024-06-04 16:05:38,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:38,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:38,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:38,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:38,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:38,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:38,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 563 transitions, 8131 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:38,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:38,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:38,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:39,664 INFO L124 PetriNetUnfolderBase]: 3185/5343 cut-off events. [2024-06-04 16:05:39,664 INFO L125 PetriNetUnfolderBase]: For 907128/907138 co-relation queries the response was YES. [2024-06-04 16:05:39,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49765 conditions, 5343 events. 3185/5343 cut-off events. For 907128/907138 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35497 event pairs, 716 based on Foata normal form. 18/5361 useless extension candidates. Maximal degree in co-relation 49570. Up to 4478 conditions per place. [2024-06-04 16:05:39,741 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 475 selfloop transitions, 111 changer transitions 0/592 dead transitions. [2024-06-04 16:05:39,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 592 transitions, 9691 flow [2024-06-04 16:05:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:05:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:05:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-04 16:05:39,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:05:39,743 INFO L175 Difference]: Start difference. First operand has 439 places, 563 transitions, 8131 flow. Second operand 10 states and 215 transitions. [2024-06-04 16:05:39,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 592 transitions, 9691 flow [2024-06-04 16:05:44,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 592 transitions, 9547 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:44,254 INFO L231 Difference]: Finished difference. Result has 442 places, 563 transitions, 8213 flow [2024-06-04 16:05:44,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7987, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8213, PETRI_PLACES=442, PETRI_TRANSITIONS=563} [2024-06-04 16:05:44,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-04 16:05:44,254 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 563 transitions, 8213 flow [2024-06-04 16:05:44,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:44,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:44,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:44,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 16:05:44,255 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:44,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:44,255 INFO L85 PathProgramCache]: Analyzing trace with hash 431824529, now seen corresponding path program 13 times [2024-06-04 16:05:44,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:44,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899451509] [2024-06-04 16:05:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:44,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:44,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:44,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899451509] [2024-06-04 16:05:44,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899451509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:44,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:44,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:44,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512774584] [2024-06-04 16:05:44,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:44,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:44,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:44,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:44,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 563 transitions, 8213 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:44,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:44,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:44,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:45,993 INFO L124 PetriNetUnfolderBase]: 3259/5461 cut-off events. [2024-06-04 16:05:45,994 INFO L125 PetriNetUnfolderBase]: For 975487/975497 co-relation queries the response was YES. [2024-06-04 16:05:46,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51748 conditions, 5461 events. 3259/5461 cut-off events. For 975487/975497 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 36463 event pairs, 746 based on Foata normal form. 18/5479 useless extension candidates. Maximal degree in co-relation 51552. Up to 4523 conditions per place. [2024-06-04 16:05:46,083 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 484 selfloop transitions, 115 changer transitions 0/605 dead transitions. [2024-06-04 16:05:46,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 605 transitions, 9867 flow [2024-06-04 16:05:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:05:46,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-04 16:05:46,084 INFO L175 Difference]: Start difference. First operand has 442 places, 563 transitions, 8213 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:05:46,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 605 transitions, 9867 flow [2024-06-04 16:05:51,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 605 transitions, 9653 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:05:51,015 INFO L231 Difference]: Finished difference. Result has 443 places, 565 transitions, 8283 flow [2024-06-04 16:05:51,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7999, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8283, PETRI_PLACES=443, PETRI_TRANSITIONS=565} [2024-06-04 16:05:51,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-04 16:05:51,016 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 565 transitions, 8283 flow [2024-06-04 16:05:51,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:51,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:51,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:51,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 16:05:51,016 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:51,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash 440395409, now seen corresponding path program 14 times [2024-06-04 16:05:51,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:51,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408280489] [2024-06-04 16:05:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:51,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:51,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:51,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408280489] [2024-06-04 16:05:51,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408280489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:51,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:51,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:51,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820651705] [2024-06-04 16:05:51,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:51,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:51,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:51,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:51,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:51,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:51,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 565 transitions, 8283 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:51,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:51,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:51,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:52,680 INFO L124 PetriNetUnfolderBase]: 3287/5501 cut-off events. [2024-06-04 16:05:52,681 INFO L125 PetriNetUnfolderBase]: For 994184/994194 co-relation queries the response was YES. [2024-06-04 16:05:52,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52283 conditions, 5501 events. 3287/5501 cut-off events. For 994184/994194 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 36731 event pairs, 764 based on Foata normal form. 18/5519 useless extension candidates. Maximal degree in co-relation 52086. Up to 4761 conditions per place. [2024-06-04 16:05:52,774 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 476 selfloop transitions, 116 changer transitions 0/598 dead transitions. [2024-06-04 16:05:52,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 598 transitions, 9617 flow [2024-06-04 16:05:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:05:52,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-04 16:05:52,775 INFO L175 Difference]: Start difference. First operand has 443 places, 565 transitions, 8283 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:05:52,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 598 transitions, 9617 flow [2024-06-04 16:05:58,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 598 transitions, 9456 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 16:05:58,661 INFO L231 Difference]: Finished difference. Result has 447 places, 566 transitions, 8389 flow [2024-06-04 16:05:58,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8130, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8389, PETRI_PLACES=447, PETRI_TRANSITIONS=566} [2024-06-04 16:05:58,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-04 16:05:58,662 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 566 transitions, 8389 flow [2024-06-04 16:05:58,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:58,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:58,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:58,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 16:05:58,662 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:58,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:58,663 INFO L85 PathProgramCache]: Analyzing trace with hash 727282739, now seen corresponding path program 15 times [2024-06-04 16:05:58,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:58,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758862782] [2024-06-04 16:05:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:58,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:59,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:59,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758862782] [2024-06-04 16:05:59,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758862782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:59,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:59,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:59,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223174781] [2024-06-04 16:05:59,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:59,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:59,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:59,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:59,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:59,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:59,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 566 transitions, 8389 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:59,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:59,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:59,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:00,402 INFO L124 PetriNetUnfolderBase]: 3315/5549 cut-off events. [2024-06-04 16:06:00,402 INFO L125 PetriNetUnfolderBase]: For 1009210/1009220 co-relation queries the response was YES. [2024-06-04 16:06:00,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52798 conditions, 5549 events. 3315/5549 cut-off events. For 1009210/1009220 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 37089 event pairs, 770 based on Foata normal form. 18/5567 useless extension candidates. Maximal degree in co-relation 52599. Up to 4805 conditions per place. [2024-06-04 16:06:00,498 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 469 selfloop transitions, 122 changer transitions 0/597 dead transitions. [2024-06-04 16:06:00,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 597 transitions, 9709 flow [2024-06-04 16:06:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:06:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:06:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-04 16:06:00,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-04 16:06:00,499 INFO L175 Difference]: Start difference. First operand has 447 places, 566 transitions, 8389 flow. Second operand 10 states and 216 transitions. [2024-06-04 16:06:00,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 597 transitions, 9709 flow [2024-06-04 16:06:06,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 597 transitions, 9478 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:06:06,794 INFO L231 Difference]: Finished difference. Result has 450 places, 567 transitions, 8431 flow [2024-06-04 16:06:06,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8158, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8431, PETRI_PLACES=450, PETRI_TRANSITIONS=567} [2024-06-04 16:06:06,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-04 16:06:06,794 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 567 transitions, 8431 flow [2024-06-04 16:06:06,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:06,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:06,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:06,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 16:06:06,795 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:06,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash -418181145, now seen corresponding path program 16 times [2024-06-04 16:06:06,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:06,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758573532] [2024-06-04 16:06:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:06,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:07,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:07,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758573532] [2024-06-04 16:06:07,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758573532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:07,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:07,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:07,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778476387] [2024-06-04 16:06:07,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:07,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:07,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:07,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:07,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:07,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 567 transitions, 8431 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:07,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:07,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:07,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:08,599 INFO L124 PetriNetUnfolderBase]: 3409/5694 cut-off events. [2024-06-04 16:06:08,599 INFO L125 PetriNetUnfolderBase]: For 1106576/1106584 co-relation queries the response was YES. [2024-06-04 16:06:08,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55416 conditions, 5694 events. 3409/5694 cut-off events. For 1106576/1106584 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 38132 event pairs, 813 based on Foata normal form. 16/5709 useless extension candidates. Maximal degree in co-relation 55216. Up to 4725 conditions per place. [2024-06-04 16:06:08,689 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 486 selfloop transitions, 110 changer transitions 0/602 dead transitions. [2024-06-04 16:06:08,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 602 transitions, 10091 flow [2024-06-04 16:06:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:06:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:06:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:06:08,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:06:08,690 INFO L175 Difference]: Start difference. First operand has 450 places, 567 transitions, 8431 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:06:08,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 602 transitions, 10091 flow [2024-06-04 16:06:14,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 602 transitions, 9846 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:06:14,597 INFO L231 Difference]: Finished difference. Result has 450 places, 570 transitions, 8507 flow [2024-06-04 16:06:14,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8186, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8507, PETRI_PLACES=450, PETRI_TRANSITIONS=570} [2024-06-04 16:06:14,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-04 16:06:14,598 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 570 transitions, 8507 flow [2024-06-04 16:06:14,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:14,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:14,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:14,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 16:06:14,599 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:14,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1236455827, now seen corresponding path program 17 times [2024-06-04 16:06:14,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:14,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293956180] [2024-06-04 16:06:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:14,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:15,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:15,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293956180] [2024-06-04 16:06:15,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293956180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:15,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:15,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:15,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866431527] [2024-06-04 16:06:15,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:15,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:15,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:15,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:15,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:15,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:15,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 570 transitions, 8507 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:15,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:15,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:16,635 INFO L124 PetriNetUnfolderBase]: 3437/5738 cut-off events. [2024-06-04 16:06:16,635 INFO L125 PetriNetUnfolderBase]: For 1126653/1126661 co-relation queries the response was YES. [2024-06-04 16:06:16,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56077 conditions, 5738 events. 3437/5738 cut-off events. For 1126653/1126661 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 38535 event pairs, 833 based on Foata normal form. 16/5753 useless extension candidates. Maximal degree in co-relation 55875. Up to 4995 conditions per place. [2024-06-04 16:06:16,720 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 480 selfloop transitions, 109 changer transitions 0/595 dead transitions. [2024-06-04 16:06:16,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 595 transitions, 9818 flow [2024-06-04 16:06:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:06:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:06:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 16:06:16,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:06:16,721 INFO L175 Difference]: Start difference. First operand has 450 places, 570 transitions, 8507 flow. Second operand 7 states and 161 transitions. [2024-06-04 16:06:16,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 595 transitions, 9818 flow [2024-06-04 16:06:22,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 595 transitions, 9663 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 16:06:22,848 INFO L231 Difference]: Finished difference. Result has 454 places, 571 transitions, 8608 flow [2024-06-04 16:06:22,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8360, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8608, PETRI_PLACES=454, PETRI_TRANSITIONS=571} [2024-06-04 16:06:22,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-04 16:06:22,848 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 571 transitions, 8608 flow [2024-06-04 16:06:22,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:22,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:22,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:22,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 16:06:22,849 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:22,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash -568558425, now seen corresponding path program 18 times [2024-06-04 16:06:22,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:22,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938928452] [2024-06-04 16:06:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:22,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:23,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:23,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938928452] [2024-06-04 16:06:23,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938928452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:23,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:23,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:23,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332947920] [2024-06-04 16:06:23,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:23,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:23,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:23,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:23,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:23,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:23,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 571 transitions, 8608 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:23,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:23,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:23,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:24,661 INFO L124 PetriNetUnfolderBase]: 3457/5778 cut-off events. [2024-06-04 16:06:24,661 INFO L125 PetriNetUnfolderBase]: For 1129612/1129620 co-relation queries the response was YES. [2024-06-04 16:06:24,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56478 conditions, 5778 events. 3457/5778 cut-off events. For 1129612/1129620 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38774 event pairs, 615 based on Foata normal form. 14/5791 useless extension candidates. Maximal degree in co-relation 56274. Up to 4178 conditions per place. [2024-06-04 16:06:24,759 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 474 selfloop transitions, 127 changer transitions 0/607 dead transitions. [2024-06-04 16:06:24,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 607 transitions, 10466 flow [2024-06-04 16:06:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:06:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:06:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:06:24,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:06:24,760 INFO L175 Difference]: Start difference. First operand has 454 places, 571 transitions, 8608 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:06:24,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 607 transitions, 10466 flow [2024-06-04 16:06:30,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 607 transitions, 10247 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:06:30,878 INFO L231 Difference]: Finished difference. Result has 456 places, 572 transitions, 8675 flow [2024-06-04 16:06:30,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8389, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8675, PETRI_PLACES=456, PETRI_TRANSITIONS=572} [2024-06-04 16:06:30,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-04 16:06:30,879 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 572 transitions, 8675 flow [2024-06-04 16:06:30,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:30,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:30,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:30,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 16:06:30,879 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:30,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:30,880 INFO L85 PathProgramCache]: Analyzing trace with hash -568438269, now seen corresponding path program 13 times [2024-06-04 16:06:30,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:30,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777510673] [2024-06-04 16:06:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:31,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:31,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777510673] [2024-06-04 16:06:31,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777510673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:31,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:31,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:31,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878660821] [2024-06-04 16:06:31,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:31,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:31,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:31,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:31,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:31,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:31,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 572 transitions, 8675 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:31,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:31,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:31,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:32,864 INFO L124 PetriNetUnfolderBase]: 3444/5756 cut-off events. [2024-06-04 16:06:32,864 INFO L125 PetriNetUnfolderBase]: For 1109000/1109010 co-relation queries the response was YES. [2024-06-04 16:06:32,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56030 conditions, 5756 events. 3444/5756 cut-off events. For 1109000/1109010 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38699 event pairs, 580 based on Foata normal form. 16/5772 useless extension candidates. Maximal degree in co-relation 55825. Up to 4699 conditions per place. [2024-06-04 16:06:32,956 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 501 selfloop transitions, 95 changer transitions 0/602 dead transitions. [2024-06-04 16:06:32,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 602 transitions, 10247 flow [2024-06-04 16:06:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:06:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:06:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:06:32,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-04 16:06:32,957 INFO L175 Difference]: Start difference. First operand has 456 places, 572 transitions, 8675 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:06:32,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 602 transitions, 10247 flow [2024-06-04 16:06:40,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 602 transitions, 9567 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-04 16:06:40,224 INFO L231 Difference]: Finished difference. Result has 454 places, 572 transitions, 8191 flow [2024-06-04 16:06:40,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7995, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8191, PETRI_PLACES=454, PETRI_TRANSITIONS=572} [2024-06-04 16:06:40,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-04 16:06:40,225 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 572 transitions, 8191 flow [2024-06-04 16:06:40,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:40,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:40,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:40,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 16:06:40,225 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:40,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:40,226 INFO L85 PathProgramCache]: Analyzing trace with hash -568438455, now seen corresponding path program 19 times [2024-06-04 16:06:40,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:40,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120436149] [2024-06-04 16:06:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:40,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:40,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:40,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120436149] [2024-06-04 16:06:40,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120436149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:40,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:40,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:40,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239232110] [2024-06-04 16:06:40,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:40,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:40,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:40,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:40,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:40,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 572 transitions, 8191 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:40,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:40,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:40,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:42,144 INFO L124 PetriNetUnfolderBase]: 3431/5739 cut-off events. [2024-06-04 16:06:42,144 INFO L125 PetriNetUnfolderBase]: For 1081900/1081910 co-relation queries the response was YES. [2024-06-04 16:06:42,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53663 conditions, 5739 events. 3431/5739 cut-off events. For 1081900/1081910 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38549 event pairs, 592 based on Foata normal form. 16/5755 useless extension candidates. Maximal degree in co-relation 53462. Up to 5051 conditions per place. [2024-06-04 16:06:42,229 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 534 selfloop transitions, 57 changer transitions 0/597 dead transitions. [2024-06-04 16:06:42,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 597 transitions, 9453 flow [2024-06-04 16:06:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:06:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:06:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 16:06:42,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-04 16:06:42,230 INFO L175 Difference]: Start difference. First operand has 454 places, 572 transitions, 8191 flow. Second operand 7 states and 160 transitions. [2024-06-04 16:06:42,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 597 transitions, 9453 flow [2024-06-04 16:06:49,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 597 transitions, 9168 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 16:06:49,365 INFO L231 Difference]: Finished difference. Result has 452 places, 572 transitions, 8024 flow [2024-06-04 16:06:49,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7906, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8024, PETRI_PLACES=452, PETRI_TRANSITIONS=572} [2024-06-04 16:06:49,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-04 16:06:49,365 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 572 transitions, 8024 flow [2024-06-04 16:06:49,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:49,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:49,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:49,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 16:06:49,366 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:49,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:49,366 INFO L85 PathProgramCache]: Analyzing trace with hash -302741175, now seen corresponding path program 20 times [2024-06-04 16:06:49,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:49,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698361712] [2024-06-04 16:06:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:49,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:49,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:49,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698361712] [2024-06-04 16:06:49,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698361712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:49,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:49,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:49,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631462319] [2024-06-04 16:06:49,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:49,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:49,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:49,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 572 transitions, 8024 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:49,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:49,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:49,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:51,325 INFO L124 PetriNetUnfolderBase]: 3418/5714 cut-off events. [2024-06-04 16:06:51,326 INFO L125 PetriNetUnfolderBase]: For 1055522/1055532 co-relation queries the response was YES. [2024-06-04 16:06:51,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52494 conditions, 5714 events. 3418/5714 cut-off events. For 1055522/1055532 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38399 event pairs, 783 based on Foata normal form. 16/5726 useless extension candidates. Maximal degree in co-relation 52293. Up to 5055 conditions per place. [2024-06-04 16:06:51,404 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 538 selfloop transitions, 54 changer transitions 0/598 dead transitions. [2024-06-04 16:06:51,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 598 transitions, 9570 flow [2024-06-04 16:06:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:06:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:06:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-04 16:06:51,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-04 16:06:51,405 INFO L175 Difference]: Start difference. First operand has 452 places, 572 transitions, 8024 flow. Second operand 8 states and 177 transitions. [2024-06-04 16:06:51,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 598 transitions, 9570 flow [2024-06-04 16:06:57,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 598 transitions, 9450 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:06:57,402 INFO L231 Difference]: Finished difference. Result has 454 places, 572 transitions, 8016 flow [2024-06-04 16:06:57,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7904, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8016, PETRI_PLACES=454, PETRI_TRANSITIONS=572} [2024-06-04 16:06:57,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-04 16:06:57,402 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 572 transitions, 8016 flow [2024-06-04 16:06:57,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:57,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:57,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:57,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 16:06:57,403 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:57,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash -302414559, now seen corresponding path program 14 times [2024-06-04 16:06:57,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:57,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904787229] [2024-06-04 16:06:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:57,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:57,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:57,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904787229] [2024-06-04 16:06:57,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904787229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:57,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:57,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134392328] [2024-06-04 16:06:57,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:57,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:57,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:57,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:57,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 572 transitions, 8016 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:57,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:57,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:57,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:59,196 INFO L124 PetriNetUnfolderBase]: 3400/5692 cut-off events. [2024-06-04 16:06:59,196 INFO L125 PetriNetUnfolderBase]: For 1027727/1027737 co-relation queries the response was YES. [2024-06-04 16:06:59,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51453 conditions, 5692 events. 3400/5692 cut-off events. For 1027727/1027737 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38313 event pairs, 775 based on Foata normal form. 18/5710 useless extension candidates. Maximal degree in co-relation 51251. Up to 5013 conditions per place. [2024-06-04 16:06:59,287 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 508 selfloop transitions, 80 changer transitions 0/594 dead transitions. [2024-06-04 16:06:59,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 594 transitions, 9296 flow [2024-06-04 16:06:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:06:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:06:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-04 16:06:59,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-04 16:06:59,288 INFO L175 Difference]: Start difference. First operand has 454 places, 572 transitions, 8016 flow. Second operand 8 states and 178 transitions. [2024-06-04 16:06:59,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 594 transitions, 9296 flow [2024-06-04 16:07:04,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 594 transitions, 9164 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:04,909 INFO L231 Difference]: Finished difference. Result has 456 places, 572 transitions, 8054 flow [2024-06-04 16:07:04,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7884, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8054, PETRI_PLACES=456, PETRI_TRANSITIONS=572} [2024-06-04 16:07:04,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-04 16:07:04,909 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 572 transitions, 8054 flow [2024-06-04 16:07:04,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:04,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:04,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:04,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 16:07:04,910 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:04,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:04,910 INFO L85 PathProgramCache]: Analyzing trace with hash -302593305, now seen corresponding path program 21 times [2024-06-04 16:07:04,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:04,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995775521] [2024-06-04 16:07:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:04,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:05,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:05,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995775521] [2024-06-04 16:07:05,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995775521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:05,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:05,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:05,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464584135] [2024-06-04 16:07:05,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:05,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:05,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:05,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:05,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:05,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 572 transitions, 8054 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:05,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:05,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:05,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:06,686 INFO L124 PetriNetUnfolderBase]: 3382/5666 cut-off events. [2024-06-04 16:07:06,686 INFO L125 PetriNetUnfolderBase]: For 986118/986128 co-relation queries the response was YES. [2024-06-04 16:07:06,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50426 conditions, 5666 events. 3382/5666 cut-off events. For 986118/986128 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38078 event pairs, 779 based on Foata normal form. 18/5684 useless extension candidates. Maximal degree in co-relation 50223. Up to 5059 conditions per place. [2024-06-04 16:07:06,779 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 538 selfloop transitions, 49 changer transitions 0/593 dead transitions. [2024-06-04 16:07:06,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 593 transitions, 9324 flow [2024-06-04 16:07:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 16:07:06,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-04 16:07:06,780 INFO L175 Difference]: Start difference. First operand has 456 places, 572 transitions, 8054 flow. Second operand 7 states and 156 transitions. [2024-06-04 16:07:06,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 593 transitions, 9324 flow [2024-06-04 16:07:12,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 593 transitions, 9153 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:12,989 INFO L231 Difference]: Finished difference. Result has 456 places, 572 transitions, 7988 flow [2024-06-04 16:07:12,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7883, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7988, PETRI_PLACES=456, PETRI_TRANSITIONS=572} [2024-06-04 16:07:12,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-04 16:07:12,990 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 572 transitions, 7988 flow [2024-06-04 16:07:12,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:12,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:12,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:12,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 16:07:12,990 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:12,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:12,991 INFO L85 PathProgramCache]: Analyzing trace with hash -302740989, now seen corresponding path program 15 times [2024-06-04 16:07:12,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:12,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730108160] [2024-06-04 16:07:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:12,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:13,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:13,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730108160] [2024-06-04 16:07:13,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730108160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:13,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:13,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:13,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577728203] [2024-06-04 16:07:13,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:13,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:13,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:13,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:13,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:13,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:13,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 572 transitions, 7988 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:13,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:13,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:13,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:14,873 INFO L124 PetriNetUnfolderBase]: 3369/5645 cut-off events. [2024-06-04 16:07:14,873 INFO L125 PetriNetUnfolderBase]: For 942356/942366 co-relation queries the response was YES. [2024-06-04 16:07:14,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49587 conditions, 5645 events. 3369/5645 cut-off events. For 942356/942366 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37983 event pairs, 734 based on Foata normal form. 16/5659 useless extension candidates. Maximal degree in co-relation 49383. Up to 4906 conditions per place. [2024-06-04 16:07:14,957 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 508 selfloop transitions, 83 changer transitions 0/597 dead transitions. [2024-06-04 16:07:14,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 597 transitions, 9306 flow [2024-06-04 16:07:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:07:14,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-04 16:07:14,958 INFO L175 Difference]: Start difference. First operand has 456 places, 572 transitions, 7988 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:07:14,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 597 transitions, 9306 flow [2024-06-04 16:07:19,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 597 transitions, 9203 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:19,987 INFO L231 Difference]: Finished difference. Result has 459 places, 572 transitions, 8057 flow [2024-06-04 16:07:19,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7885, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8057, PETRI_PLACES=459, PETRI_TRANSITIONS=572} [2024-06-04 16:07:19,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-04 16:07:19,987 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 572 transitions, 8057 flow [2024-06-04 16:07:19,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:19,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:19,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:19,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 16:07:19,987 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:19,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:19,988 INFO L85 PathProgramCache]: Analyzing trace with hash -172646733, now seen corresponding path program 22 times [2024-06-04 16:07:19,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:19,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212419609] [2024-06-04 16:07:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:19,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:20,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:20,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212419609] [2024-06-04 16:07:20,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212419609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:20,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:20,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282201379] [2024-06-04 16:07:20,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:20,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:20,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:20,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:20,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:20,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:20,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 572 transitions, 8057 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:20,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:20,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:20,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:21,749 INFO L124 PetriNetUnfolderBase]: 3351/5621 cut-off events. [2024-06-04 16:07:21,749 INFO L125 PetriNetUnfolderBase]: For 913477/913487 co-relation queries the response was YES. [2024-06-04 16:07:21,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48638 conditions, 5621 events. 3351/5621 cut-off events. For 913477/913487 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37862 event pairs, 752 based on Foata normal form. 18/5639 useless extension candidates. Maximal degree in co-relation 48433. Up to 4790 conditions per place. [2024-06-04 16:07:21,841 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 498 selfloop transitions, 98 changer transitions 0/602 dead transitions. [2024-06-04 16:07:21,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 602 transitions, 9369 flow [2024-06-04 16:07:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:07:21,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-04 16:07:21,842 INFO L175 Difference]: Start difference. First operand has 459 places, 572 transitions, 8057 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:07:21,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 602 transitions, 9369 flow [2024-06-04 16:07:28,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 602 transitions, 9147 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:07:28,487 INFO L231 Difference]: Finished difference. Result has 458 places, 572 transitions, 8047 flow [2024-06-04 16:07:28,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7835, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8047, PETRI_PLACES=458, PETRI_TRANSITIONS=572} [2024-06-04 16:07:28,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-04 16:07:28,488 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 572 transitions, 8047 flow [2024-06-04 16:07:28,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:28,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:28,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:28,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 16:07:28,489 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:28,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:28,490 INFO L85 PathProgramCache]: Analyzing trace with hash -178009113, now seen corresponding path program 23 times [2024-06-04 16:07:28,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:28,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680925554] [2024-06-04 16:07:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:28,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:29,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:29,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680925554] [2024-06-04 16:07:29,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680925554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:29,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:29,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003037421] [2024-06-04 16:07:29,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:29,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:29,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:29,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:29,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:29,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:29,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 572 transitions, 8047 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:29,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:29,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:29,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:30,489 INFO L124 PetriNetUnfolderBase]: 3333/5595 cut-off events. [2024-06-04 16:07:30,489 INFO L125 PetriNetUnfolderBase]: For 865179/865189 co-relation queries the response was YES. [2024-06-04 16:07:30,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47582 conditions, 5595 events. 3333/5595 cut-off events. For 865179/865189 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37694 event pairs, 744 based on Foata normal form. 18/5613 useless extension candidates. Maximal degree in co-relation 47376. Up to 4742 conditions per place. [2024-06-04 16:07:30,594 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 99 changer transitions 0/606 dead transitions. [2024-06-04 16:07:30,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 606 transitions, 9377 flow [2024-06-04 16:07:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:07:30,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-04 16:07:30,595 INFO L175 Difference]: Start difference. First operand has 458 places, 572 transitions, 8047 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:07:30,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 606 transitions, 9377 flow [2024-06-04 16:07:36,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 606 transitions, 9154 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:36,043 INFO L231 Difference]: Finished difference. Result has 459 places, 572 transitions, 8039 flow [2024-06-04 16:07:36,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7824, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8039, PETRI_PLACES=459, PETRI_TRANSITIONS=572} [2024-06-04 16:07:36,044 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-04 16:07:36,044 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 572 transitions, 8039 flow [2024-06-04 16:07:36,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:36,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:36,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:36,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 16:07:36,045 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:36,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash -177830367, now seen corresponding path program 16 times [2024-06-04 16:07:36,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:36,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845438437] [2024-06-04 16:07:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:36,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:36,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:36,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845438437] [2024-06-04 16:07:36,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845438437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:36,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:36,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:36,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307333755] [2024-06-04 16:07:36,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:36,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:36,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:36,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:36,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:36,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:36,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 572 transitions, 8039 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:36,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:36,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:36,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:37,948 INFO L124 PetriNetUnfolderBase]: 3361/5639 cut-off events. [2024-06-04 16:07:37,948 INFO L125 PetriNetUnfolderBase]: For 865809/865819 co-relation queries the response was YES. [2024-06-04 16:07:38,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47966 conditions, 5639 events. 3361/5639 cut-off events. For 865809/865819 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38024 event pairs, 748 based on Foata normal form. 18/5657 useless extension candidates. Maximal degree in co-relation 47760. Up to 4892 conditions per place. [2024-06-04 16:07:38,034 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 505 selfloop transitions, 83 changer transitions 0/594 dead transitions. [2024-06-04 16:07:38,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 594 transitions, 9348 flow [2024-06-04 16:07:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 16:07:38,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-04 16:07:38,035 INFO L175 Difference]: Start difference. First operand has 459 places, 572 transitions, 8039 flow. Second operand 7 states and 160 transitions. [2024-06-04 16:07:38,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 594 transitions, 9348 flow [2024-06-04 16:07:44,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 594 transitions, 9129 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 16:07:44,335 INFO L231 Difference]: Finished difference. Result has 457 places, 573 transitions, 8037 flow [2024-06-04 16:07:44,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7820, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8037, PETRI_PLACES=457, PETRI_TRANSITIONS=573} [2024-06-04 16:07:44,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-04 16:07:44,335 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 573 transitions, 8037 flow [2024-06-04 16:07:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:44,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:44,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:44,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 16:07:44,336 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:44,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:44,336 INFO L85 PathProgramCache]: Analyzing trace with hash -167105607, now seen corresponding path program 17 times [2024-06-04 16:07:44,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:44,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841311187] [2024-06-04 16:07:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:44,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:44,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:44,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841311187] [2024-06-04 16:07:44,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841311187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:44,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:44,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:44,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020950916] [2024-06-04 16:07:44,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:44,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:44,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:44,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:44,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:44,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:44,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 573 transitions, 8037 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:44,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:44,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:44,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:46,163 INFO L124 PetriNetUnfolderBase]: 3376/5668 cut-off events. [2024-06-04 16:07:46,163 INFO L125 PetriNetUnfolderBase]: For 838491/838501 co-relation queries the response was YES. [2024-06-04 16:07:46,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47814 conditions, 5668 events. 3376/5668 cut-off events. For 838491/838501 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38291 event pairs, 753 based on Foata normal form. 18/5686 useless extension candidates. Maximal degree in co-relation 47609. Up to 4985 conditions per place. [2024-06-04 16:07:46,255 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 509 selfloop transitions, 81 changer transitions 0/596 dead transitions. [2024-06-04 16:07:46,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 596 transitions, 9354 flow [2024-06-04 16:07:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-04 16:07:46,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-04 16:07:46,256 INFO L175 Difference]: Start difference. First operand has 457 places, 573 transitions, 8037 flow. Second operand 8 states and 177 transitions. [2024-06-04 16:07:46,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 596 transitions, 9354 flow [2024-06-04 16:07:50,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 596 transitions, 9176 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:50,856 INFO L231 Difference]: Finished difference. Result has 458 places, 574 transitions, 8066 flow [2024-06-04 16:07:50,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7859, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8066, PETRI_PLACES=458, PETRI_TRANSITIONS=574} [2024-06-04 16:07:50,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-04 16:07:50,856 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 574 transitions, 8066 flow [2024-06-04 16:07:50,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:50,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:50,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:50,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 16:07:50,857 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:50,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash -178156797, now seen corresponding path program 18 times [2024-06-04 16:07:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:50,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808436516] [2024-06-04 16:07:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:50,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:51,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:51,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808436516] [2024-06-04 16:07:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808436516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:51,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:51,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:51,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891842115] [2024-06-04 16:07:51,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:51,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:51,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:51,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 574 transitions, 8066 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:51,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:51,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:51,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:52,644 INFO L124 PetriNetUnfolderBase]: 3363/5649 cut-off events. [2024-06-04 16:07:52,644 INFO L125 PetriNetUnfolderBase]: For 766826/766836 co-relation queries the response was YES. [2024-06-04 16:07:52,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46729 conditions, 5649 events. 3363/5649 cut-off events. For 766826/766836 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38165 event pairs, 515 based on Foata normal form. 16/5665 useless extension candidates. Maximal degree in co-relation 46525. Up to 4589 conditions per place. [2024-06-04 16:07:52,734 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 496 selfloop transitions, 99 changer transitions 0/601 dead transitions. [2024-06-04 16:07:52,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 601 transitions, 9398 flow [2024-06-04 16:07:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:07:52,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:07:52,735 INFO L175 Difference]: Start difference. First operand has 458 places, 574 transitions, 8066 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:07:52,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 601 transitions, 9398 flow [2024-06-04 16:07:57,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 601 transitions, 9217 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:57,394 INFO L231 Difference]: Finished difference. Result has 458 places, 574 transitions, 8097 flow [2024-06-04 16:07:57,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7885, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8097, PETRI_PLACES=458, PETRI_TRANSITIONS=574} [2024-06-04 16:07:57,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-04 16:07:57,395 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 574 transitions, 8097 flow [2024-06-04 16:07:57,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:57,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:57,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:57,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 16:07:57,395 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:57,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash -178156983, now seen corresponding path program 24 times [2024-06-04 16:07:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789053635] [2024-06-04 16:07:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:57,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:57,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789053635] [2024-06-04 16:07:57,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789053635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:57,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:57,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:57,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974209228] [2024-06-04 16:07:57,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:57,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:57,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:57,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:57,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 574 transitions, 8097 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:57,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:57,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:57,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:59,354 INFO L124 PetriNetUnfolderBase]: 3350/5632 cut-off events. [2024-06-04 16:07:59,354 INFO L125 PetriNetUnfolderBase]: For 724171/724181 co-relation queries the response was YES. [2024-06-04 16:07:59,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45999 conditions, 5632 events. 3350/5632 cut-off events. For 724171/724181 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38110 event pairs, 506 based on Foata normal form. 16/5648 useless extension candidates. Maximal degree in co-relation 45795. Up to 4423 conditions per place. [2024-06-04 16:07:59,433 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 489 selfloop transitions, 116 changer transitions 0/611 dead transitions. [2024-06-04 16:07:59,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 611 transitions, 9463 flow [2024-06-04 16:07:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:59,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:07:59,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:07:59,434 INFO L175 Difference]: Start difference. First operand has 458 places, 574 transitions, 8097 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:07:59,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 611 transitions, 9463 flow [2024-06-04 16:08:04,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 611 transitions, 9243 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:08:04,542 INFO L231 Difference]: Finished difference. Result has 458 places, 574 transitions, 8117 flow [2024-06-04 16:08:04,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7877, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8117, PETRI_PLACES=458, PETRI_TRANSITIONS=574} [2024-06-04 16:08:04,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-04 16:08:04,543 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 574 transitions, 8117 flow [2024-06-04 16:08:04,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:04,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:04,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:04,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 16:08:04,543 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:04,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash 82586425, now seen corresponding path program 19 times [2024-06-04 16:08:04,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:04,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101071160] [2024-06-04 16:08:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:04,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:04,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101071160] [2024-06-04 16:08:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101071160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:04,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:04,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:04,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281858484] [2024-06-04 16:08:04,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:04,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:04,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:04,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:04,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:04,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 574 transitions, 8117 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:04,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:04,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:04,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:06,227 INFO L124 PetriNetUnfolderBase]: 3378/5672 cut-off events. [2024-06-04 16:08:06,227 INFO L125 PetriNetUnfolderBase]: For 719386/719388 co-relation queries the response was YES. [2024-06-04 16:08:06,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46236 conditions, 5672 events. 3378/5672 cut-off events. For 719386/719388 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 38369 event pairs, 783 based on Foata normal form. 10/5681 useless extension candidates. Maximal degree in co-relation 46034. Up to 4991 conditions per place. [2024-06-04 16:08:06,317 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 484 selfloop transitions, 100 changer transitions 0/590 dead transitions. [2024-06-04 16:08:06,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 590 transitions, 9410 flow [2024-06-04 16:08:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:06,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-04 16:08:06,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-04 16:08:06,318 INFO L175 Difference]: Start difference. First operand has 458 places, 574 transitions, 8117 flow. Second operand 7 states and 152 transitions. [2024-06-04 16:08:06,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 590 transitions, 9410 flow [2024-06-04 16:08:10,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 590 transitions, 9166 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 16:08:10,854 INFO L231 Difference]: Finished difference. Result has 456 places, 575 transitions, 8119 flow [2024-06-04 16:08:10,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7873, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8119, PETRI_PLACES=456, PETRI_TRANSITIONS=575} [2024-06-04 16:08:10,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-04 16:08:10,855 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 575 transitions, 8119 flow [2024-06-04 16:08:10,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:10,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:10,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:10,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 16:08:10,855 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:10,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1636830303, now seen corresponding path program 20 times [2024-06-04 16:08:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:10,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969640040] [2024-06-04 16:08:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:10,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:11,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:11,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969640040] [2024-06-04 16:08:11,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969640040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:11,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:11,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802211610] [2024-06-04 16:08:11,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:11,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:11,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:11,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:11,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:11,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:11,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 575 transitions, 8119 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:11,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:11,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:11,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:12,685 INFO L124 PetriNetUnfolderBase]: 3439/5773 cut-off events. [2024-06-04 16:08:12,685 INFO L125 PetriNetUnfolderBase]: For 751739/751749 co-relation queries the response was YES. [2024-06-04 16:08:12,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47583 conditions, 5773 events. 3439/5773 cut-off events. For 751739/751749 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 39075 event pairs, 752 based on Foata normal form. 18/5791 useless extension candidates. Maximal degree in co-relation 47382. Up to 4744 conditions per place. [2024-06-04 16:08:12,771 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 487 selfloop transitions, 112 changer transitions 0/605 dead transitions. [2024-06-04 16:08:12,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 605 transitions, 9793 flow [2024-06-04 16:08:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-04 16:08:12,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-04 16:08:12,772 INFO L175 Difference]: Start difference. First operand has 456 places, 575 transitions, 8119 flow. Second operand 9 states and 197 transitions. [2024-06-04 16:08:12,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 605 transitions, 9793 flow [2024-06-04 16:08:17,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 605 transitions, 9576 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:17,504 INFO L231 Difference]: Finished difference. Result has 461 places, 577 transitions, 8238 flow [2024-06-04 16:08:17,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7902, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8238, PETRI_PLACES=461, PETRI_TRANSITIONS=577} [2024-06-04 16:08:17,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-04 16:08:17,505 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 577 transitions, 8238 flow [2024-06-04 16:08:17,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:17,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:17,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:17,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 16:08:17,506 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:17,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash 79729465, now seen corresponding path program 21 times [2024-06-04 16:08:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:17,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763565809] [2024-06-04 16:08:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:18,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:18,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763565809] [2024-06-04 16:08:18,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763565809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:18,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:18,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:18,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428735339] [2024-06-04 16:08:18,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:18,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:18,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:18,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:18,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:18,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 577 transitions, 8238 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:18,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:18,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:18,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:19,423 INFO L124 PetriNetUnfolderBase]: 3454/5800 cut-off events. [2024-06-04 16:08:19,423 INFO L125 PetriNetUnfolderBase]: For 751634/751636 co-relation queries the response was YES. [2024-06-04 16:08:19,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47893 conditions, 5800 events. 3454/5800 cut-off events. For 751634/751636 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 39439 event pairs, 801 based on Foata normal form. 10/5809 useless extension candidates. Maximal degree in co-relation 47690. Up to 4999 conditions per place. [2024-06-04 16:08:19,525 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 489 selfloop transitions, 102 changer transitions 0/597 dead transitions. [2024-06-04 16:08:19,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 597 transitions, 9599 flow [2024-06-04 16:08:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-04 16:08:19,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-04 16:08:19,526 INFO L175 Difference]: Start difference. First operand has 461 places, 577 transitions, 8238 flow. Second operand 7 states and 155 transitions. [2024-06-04 16:08:19,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 597 transitions, 9599 flow [2024-06-04 16:08:24,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 597 transitions, 9393 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:24,526 INFO L231 Difference]: Finished difference. Result has 461 places, 578 transitions, 8275 flow [2024-06-04 16:08:24,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8032, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8275, PETRI_PLACES=461, PETRI_TRANSITIONS=578} [2024-06-04 16:08:24,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-04 16:08:24,527 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 578 transitions, 8275 flow [2024-06-04 16:08:24,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:24,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:24,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:24,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 16:08:24,527 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:24,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1633973343, now seen corresponding path program 22 times [2024-06-04 16:08:24,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:24,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050737547] [2024-06-04 16:08:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:24,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:24,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050737547] [2024-06-04 16:08:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050737547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:24,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:24,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269225274] [2024-06-04 16:08:24,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:24,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:24,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:24,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:24,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 578 transitions, 8275 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:24,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:24,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:24,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:26,413 INFO L124 PetriNetUnfolderBase]: 3482/5846 cut-off events. [2024-06-04 16:08:26,414 INFO L125 PetriNetUnfolderBase]: For 753179/753189 co-relation queries the response was YES. [2024-06-04 16:08:26,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48253 conditions, 5846 events. 3482/5846 cut-off events. For 753179/753189 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39821 event pairs, 793 based on Foata normal form. 18/5864 useless extension candidates. Maximal degree in co-relation 48050. Up to 5123 conditions per place. [2024-06-04 16:08:26,503 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 490 selfloop transitions, 106 changer transitions 0/602 dead transitions. [2024-06-04 16:08:26,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 602 transitions, 9614 flow [2024-06-04 16:08:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 16:08:26,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-04 16:08:26,504 INFO L175 Difference]: Start difference. First operand has 461 places, 578 transitions, 8275 flow. Second operand 9 states and 193 transitions. [2024-06-04 16:08:26,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 602 transitions, 9614 flow [2024-06-04 16:08:31,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 602 transitions, 9398 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:31,552 INFO L231 Difference]: Finished difference. Result has 465 places, 579 transitions, 8322 flow [2024-06-04 16:08:31,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8059, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8322, PETRI_PLACES=465, PETRI_TRANSITIONS=579} [2024-06-04 16:08:31,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-04 16:08:31,553 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 579 transitions, 8322 flow [2024-06-04 16:08:31,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:31,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:31,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:31,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 16:08:31,554 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:31,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:31,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1862053239, now seen corresponding path program 25 times [2024-06-04 16:08:31,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:31,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293356275] [2024-06-04 16:08:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:31,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:32,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:32,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293356275] [2024-06-04 16:08:32,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293356275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:32,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:32,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:32,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414665140] [2024-06-04 16:08:32,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:32,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:32,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:32,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:32,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:32,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 579 transitions, 8322 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:32,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:32,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:32,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:33,517 INFO L124 PetriNetUnfolderBase]: 3464/5820 cut-off events. [2024-06-04 16:08:33,517 INFO L125 PetriNetUnfolderBase]: For 707505/707515 co-relation queries the response was YES. [2024-06-04 16:08:33,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47160 conditions, 5820 events. 3464/5820 cut-off events. For 707505/707515 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39715 event pairs, 771 based on Foata normal form. 18/5838 useless extension candidates. Maximal degree in co-relation 46956. Up to 4905 conditions per place. [2024-06-04 16:08:33,613 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 488 selfloop transitions, 123 changer transitions 0/617 dead transitions. [2024-06-04 16:08:33,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 617 transitions, 9684 flow [2024-06-04 16:08:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:08:33,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:08:33,614 INFO L175 Difference]: Start difference. First operand has 465 places, 579 transitions, 8322 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:08:33,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 617 transitions, 9684 flow [2024-06-04 16:08:38,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 617 transitions, 9458 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:38,995 INFO L231 Difference]: Finished difference. Result has 467 places, 579 transitions, 8356 flow [2024-06-04 16:08:38,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8096, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8356, PETRI_PLACES=467, PETRI_TRANSITIONS=579} [2024-06-04 16:08:38,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-04 16:08:38,996 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 579 transitions, 8356 flow [2024-06-04 16:08:38,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:38,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:38,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:38,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 16:08:38,997 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:38,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:38,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1861874493, now seen corresponding path program 23 times [2024-06-04 16:08:38,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:38,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544646579] [2024-06-04 16:08:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:38,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:39,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:39,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544646579] [2024-06-04 16:08:39,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544646579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:39,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:39,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:39,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186815028] [2024-06-04 16:08:39,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:39,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:39,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:39,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:39,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 579 transitions, 8356 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:39,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:39,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:39,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:41,180 INFO L124 PetriNetUnfolderBase]: 3446/5794 cut-off events. [2024-06-04 16:08:41,181 INFO L125 PetriNetUnfolderBase]: For 656466/656476 co-relation queries the response was YES. [2024-06-04 16:08:41,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46045 conditions, 5794 events. 3446/5794 cut-off events. For 656466/656476 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39474 event pairs, 777 based on Foata normal form. 18/5812 useless extension candidates. Maximal degree in co-relation 45840. Up to 5039 conditions per place. [2024-06-04 16:08:41,263 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 489 selfloop transitions, 111 changer transitions 0/606 dead transitions. [2024-06-04 16:08:41,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 606 transitions, 9672 flow [2024-06-04 16:08:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:08:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:08:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-04 16:08:41,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-04 16:08:41,264 INFO L175 Difference]: Start difference. First operand has 467 places, 579 transitions, 8356 flow. Second operand 10 states and 213 transitions. [2024-06-04 16:08:41,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 606 transitions, 9672 flow [2024-06-04 16:08:45,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 606 transitions, 9397 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-04 16:08:45,728 INFO L231 Difference]: Finished difference. Result has 467 places, 579 transitions, 8314 flow [2024-06-04 16:08:45,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8081, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8314, PETRI_PLACES=467, PETRI_TRANSITIONS=579} [2024-06-04 16:08:45,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-04 16:08:45,729 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 579 transitions, 8314 flow [2024-06-04 16:08:45,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:45,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:45,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:45,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 16:08:45,729 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:45,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:45,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1862201109, now seen corresponding path program 26 times [2024-06-04 16:08:45,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:45,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55438130] [2024-06-04 16:08:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:45,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:46,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:46,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55438130] [2024-06-04 16:08:46,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55438130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:46,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:46,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:46,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335182696] [2024-06-04 16:08:46,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:46,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:46,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:46,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:46,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:46,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:46,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 579 transitions, 8314 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:46,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:46,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:46,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:47,844 INFO L124 PetriNetUnfolderBase]: 3433/5769 cut-off events. [2024-06-04 16:08:47,845 INFO L125 PetriNetUnfolderBase]: For 581700/581710 co-relation queries the response was YES. [2024-06-04 16:08:47,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44871 conditions, 5769 events. 3433/5769 cut-off events. For 581700/581710 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39282 event pairs, 705 based on Foata normal form. 16/5779 useless extension candidates. Maximal degree in co-relation 44667. Up to 4683 conditions per place. [2024-06-04 16:08:47,938 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 483 selfloop transitions, 135 changer transitions 0/624 dead transitions. [2024-06-04 16:08:47,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 624 transitions, 9726 flow [2024-06-04 16:08:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:08:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:08:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-04 16:08:47,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5682926829268292 [2024-06-04 16:08:47,939 INFO L175 Difference]: Start difference. First operand has 467 places, 579 transitions, 8314 flow. Second operand 10 states and 233 transitions. [2024-06-04 16:08:47,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 624 transitions, 9726 flow [2024-06-04 16:08:52,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 624 transitions, 9472 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-04 16:08:52,067 INFO L231 Difference]: Finished difference. Result has 468 places, 579 transitions, 8340 flow [2024-06-04 16:08:52,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8060, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8340, PETRI_PLACES=468, PETRI_TRANSITIONS=579} [2024-06-04 16:08:52,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-04 16:08:52,067 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 579 transitions, 8340 flow [2024-06-04 16:08:52,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:52,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:52,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:52,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 16:08:52,068 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:52,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:52,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1862200923, now seen corresponding path program 24 times [2024-06-04 16:08:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:52,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695768755] [2024-06-04 16:08:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:52,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:52,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695768755] [2024-06-04 16:08:52,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695768755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:52,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:52,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:52,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963750946] [2024-06-04 16:08:52,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:52,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:52,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:52,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 579 transitions, 8340 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:52,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:52,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:52,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:54,171 INFO L124 PetriNetUnfolderBase]: 3420/5743 cut-off events. [2024-06-04 16:08:54,171 INFO L125 PetriNetUnfolderBase]: For 544353/544363 co-relation queries the response was YES. [2024-06-04 16:08:54,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44158 conditions, 5743 events. 3420/5743 cut-off events. For 544353/544363 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39064 event pairs, 726 based on Foata normal form. 16/5746 useless extension candidates. Maximal degree in co-relation 43953. Up to 4765 conditions per place. [2024-06-04 16:08:54,265 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 479 selfloop transitions, 127 changer transitions 0/612 dead transitions. [2024-06-04 16:08:54,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 612 transitions, 9708 flow [2024-06-04 16:08:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:08:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:08:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 16:08:54,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-04 16:08:54,266 INFO L175 Difference]: Start difference. First operand has 468 places, 579 transitions, 8340 flow. Second operand 10 states and 219 transitions. [2024-06-04 16:08:54,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 612 transitions, 9708 flow [2024-06-04 16:08:58,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 612 transitions, 9410 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-04 16:08:58,608 INFO L231 Difference]: Finished difference. Result has 466 places, 579 transitions, 8306 flow [2024-06-04 16:08:58,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8042, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8306, PETRI_PLACES=466, PETRI_TRANSITIONS=579} [2024-06-04 16:08:58,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-04 16:08:58,609 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 579 transitions, 8306 flow [2024-06-04 16:08:58,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:58,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:58,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:58,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 16:08:58,609 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:58,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1950766869, now seen corresponding path program 27 times [2024-06-04 16:08:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:58,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509166648] [2024-06-04 16:08:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:59,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:59,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509166648] [2024-06-04 16:08:59,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509166648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:59,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:59,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:59,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572663618] [2024-06-04 16:08:59,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:59,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:59,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:59,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:59,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:59,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:08:59,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 579 transitions, 8306 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:59,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:59,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:08:59,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:00,561 INFO L124 PetriNetUnfolderBase]: 3407/5737 cut-off events. [2024-06-04 16:09:00,561 INFO L125 PetriNetUnfolderBase]: For 487364/487374 co-relation queries the response was YES. [2024-06-04 16:09:00,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43108 conditions, 5737 events. 3407/5737 cut-off events. For 487364/487374 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39044 event pairs, 452 based on Foata normal form. 16/5753 useless extension candidates. Maximal degree in co-relation 42905. Up to 3965 conditions per place. [2024-06-04 16:09:00,648 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 461 selfloop transitions, 154 changer transitions 0/621 dead transitions. [2024-06-04 16:09:00,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 621 transitions, 9704 flow [2024-06-04 16:09:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:09:00,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:09:00,649 INFO L175 Difference]: Start difference. First operand has 466 places, 579 transitions, 8306 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:09:00,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 621 transitions, 9704 flow [2024-06-04 16:09:04,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 621 transitions, 9393 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-04 16:09:04,159 INFO L231 Difference]: Finished difference. Result has 463 places, 579 transitions, 8311 flow [2024-06-04 16:09:04,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7995, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8311, PETRI_PLACES=463, PETRI_TRANSITIONS=579} [2024-06-04 16:09:04,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-04 16:09:04,160 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 579 transitions, 8311 flow [2024-06-04 16:09:04,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:04,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:04,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:04,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 16:09:04,160 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:04,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1950766683, now seen corresponding path program 25 times [2024-06-04 16:09:04,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:04,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006790443] [2024-06-04 16:09:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:04,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:04,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:04,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006790443] [2024-06-04 16:09:04,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006790443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:04,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:04,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:04,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230713432] [2024-06-04 16:09:04,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:04,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:04,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:04,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:04,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:04,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:04,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 579 transitions, 8311 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:04,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:04,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:04,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:06,191 INFO L124 PetriNetUnfolderBase]: 3427/5769 cut-off events. [2024-06-04 16:09:06,191 INFO L125 PetriNetUnfolderBase]: For 474032/474042 co-relation queries the response was YES. [2024-06-04 16:09:06,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43283 conditions, 5769 events. 3427/5769 cut-off events. For 474032/474042 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39287 event pairs, 480 based on Foata normal form. 16/5785 useless extension candidates. Maximal degree in co-relation 43083. Up to 3941 conditions per place. [2024-06-04 16:09:06,273 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 455 selfloop transitions, 156 changer transitions 0/617 dead transitions. [2024-06-04 16:09:06,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 617 transitions, 10016 flow [2024-06-04 16:09:06,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-04 16:09:06,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:09:06,274 INFO L175 Difference]: Start difference. First operand has 463 places, 579 transitions, 8311 flow. Second operand 9 states and 207 transitions. [2024-06-04 16:09:06,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 617 transitions, 10016 flow [2024-06-04 16:09:09,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 617 transitions, 9635 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-04 16:09:09,567 INFO L231 Difference]: Finished difference. Result has 461 places, 580 transitions, 8297 flow [2024-06-04 16:09:09,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7940, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8297, PETRI_PLACES=461, PETRI_TRANSITIONS=580} [2024-06-04 16:09:09,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-04 16:09:09,568 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 580 transitions, 8297 flow [2024-06-04 16:09:09,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:09,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:09,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:09,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 16:09:09,568 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:09,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:09,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1950529533, now seen corresponding path program 26 times [2024-06-04 16:09:09,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:09,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610266098] [2024-06-04 16:09:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:09,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:10,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:10,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610266098] [2024-06-04 16:09:10,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610266098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:10,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:10,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:10,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135468149] [2024-06-04 16:09:10,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:10,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:10,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:10,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:10,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:10,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:10,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 580 transitions, 8297 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:10,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:10,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:10,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:11,409 INFO L124 PetriNetUnfolderBase]: 3414/5750 cut-off events. [2024-06-04 16:09:11,409 INFO L125 PetriNetUnfolderBase]: For 411249/411259 co-relation queries the response was YES. [2024-06-04 16:09:11,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42286 conditions, 5750 events. 3414/5750 cut-off events. For 411249/411259 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39174 event pairs, 481 based on Foata normal form. 16/5766 useless extension candidates. Maximal degree in co-relation 42087. Up to 3935 conditions per place. [2024-06-04 16:09:11,500 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 447 selfloop transitions, 159 changer transitions 0/612 dead transitions. [2024-06-04 16:09:11,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 612 transitions, 9687 flow [2024-06-04 16:09:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:09:11,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-04 16:09:11,501 INFO L175 Difference]: Start difference. First operand has 461 places, 580 transitions, 8297 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:09:11,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 612 transitions, 9687 flow [2024-06-04 16:09:14,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 612 transitions, 9357 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-06-04 16:09:14,588 INFO L231 Difference]: Finished difference. Result has 458 places, 580 transitions, 8293 flow [2024-06-04 16:09:14,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8293, PETRI_PLACES=458, PETRI_TRANSITIONS=580} [2024-06-04 16:09:14,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-04 16:09:14,588 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 580 transitions, 8293 flow [2024-06-04 16:09:14,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:14,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:14,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:14,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 16:09:14,589 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:14,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:14,589 INFO L85 PathProgramCache]: Analyzing trace with hash 638633651, now seen corresponding path program 1 times [2024-06-04 16:09:14,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:14,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140123516] [2024-06-04 16:09:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:14,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:15,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:15,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140123516] [2024-06-04 16:09:15,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140123516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:15,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:15,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:15,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45655836] [2024-06-04 16:09:15,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:15,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:15,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:15,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:15,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:15,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:15,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 580 transitions, 8293 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:15,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:15,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:15,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:16,752 INFO L124 PetriNetUnfolderBase]: 3434/5786 cut-off events. [2024-06-04 16:09:16,753 INFO L125 PetriNetUnfolderBase]: For 398489/398499 co-relation queries the response was YES. [2024-06-04 16:09:16,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42265 conditions, 5786 events. 3434/5786 cut-off events. For 398489/398499 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 39510 event pairs, 704 based on Foata normal form. 16/5802 useless extension candidates. Maximal degree in co-relation 42071. Up to 4276 conditions per place. [2024-06-04 16:09:16,835 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 484 selfloop transitions, 133 changer transitions 0/623 dead transitions. [2024-06-04 16:09:16,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 623 transitions, 9965 flow [2024-06-04 16:09:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:09:16,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-04 16:09:16,837 INFO L175 Difference]: Start difference. First operand has 458 places, 580 transitions, 8293 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:09:16,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 623 transitions, 9965 flow [2024-06-04 16:09:19,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 623 transitions, 9608 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-04 16:09:19,911 INFO L231 Difference]: Finished difference. Result has 457 places, 581 transitions, 8230 flow [2024-06-04 16:09:19,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7940, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8230, PETRI_PLACES=457, PETRI_TRANSITIONS=581} [2024-06-04 16:09:19,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-04 16:09:19,911 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 581 transitions, 8230 flow [2024-06-04 16:09:19,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:19,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:19,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:19,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 16:09:19,911 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:19,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash 638932553, now seen corresponding path program 1 times [2024-06-04 16:09:19,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:19,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138608180] [2024-06-04 16:09:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:19,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:20,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:20,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138608180] [2024-06-04 16:09:20,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138608180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:20,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:20,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:20,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482814840] [2024-06-04 16:09:20,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:20,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:20,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:20,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:20,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:20,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:20,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 581 transitions, 8230 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:20,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:20,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:20,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:21,949 INFO L124 PetriNetUnfolderBase]: 3541/5963 cut-off events. [2024-06-04 16:09:21,949 INFO L125 PetriNetUnfolderBase]: For 439295/439305 co-relation queries the response was YES. [2024-06-04 16:09:22,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43806 conditions, 5963 events. 3541/5963 cut-off events. For 439295/439305 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 40925 event pairs, 742 based on Foata normal form. 16/5979 useless extension candidates. Maximal degree in co-relation 43613. Up to 4945 conditions per place. [2024-06-04 16:09:22,029 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 516 selfloop transitions, 97 changer transitions 0/619 dead transitions. [2024-06-04 16:09:22,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 619 transitions, 9929 flow [2024-06-04 16:09:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:09:22,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-04 16:09:22,030 INFO L175 Difference]: Start difference. First operand has 457 places, 581 transitions, 8230 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:09:22,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 619 transitions, 9929 flow [2024-06-04 16:09:25,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 619 transitions, 9550 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:25,100 INFO L231 Difference]: Finished difference. Result has 461 places, 589 transitions, 8220 flow [2024-06-04 16:09:25,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7861, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8220, PETRI_PLACES=461, PETRI_TRANSITIONS=589} [2024-06-04 16:09:25,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-04 16:09:25,100 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 589 transitions, 8220 flow [2024-06-04 16:09:25,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:25,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:25,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:25,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 16:09:25,101 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:25,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:25,101 INFO L85 PathProgramCache]: Analyzing trace with hash 638932181, now seen corresponding path program 2 times [2024-06-04 16:09:25,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:25,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408447052] [2024-06-04 16:09:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:25,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:25,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:25,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408447052] [2024-06-04 16:09:25,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408447052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:25,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:25,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:25,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84228408] [2024-06-04 16:09:25,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:25,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:25,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:25,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:25,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 589 transitions, 8220 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:25,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:25,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:25,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:27,192 INFO L124 PetriNetUnfolderBase]: 3561/5999 cut-off events. [2024-06-04 16:09:27,192 INFO L125 PetriNetUnfolderBase]: For 446464/446474 co-relation queries the response was YES. [2024-06-04 16:09:27,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43467 conditions, 5999 events. 3561/5999 cut-off events. For 446464/446474 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 41241 event pairs, 717 based on Foata normal form. 16/6015 useless extension candidates. Maximal degree in co-relation 43272. Up to 4402 conditions per place. [2024-06-04 16:09:27,272 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 486 selfloop transitions, 138 changer transitions 0/630 dead transitions. [2024-06-04 16:09:27,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 630 transitions, 9913 flow [2024-06-04 16:09:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:09:27,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:09:27,273 INFO L175 Difference]: Start difference. First operand has 461 places, 589 transitions, 8220 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:09:27,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 630 transitions, 9913 flow [2024-06-04 16:09:30,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 630 transitions, 9727 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:09:30,468 INFO L231 Difference]: Finished difference. Result has 464 places, 590 transitions, 8330 flow [2024-06-04 16:09:30,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8036, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8330, PETRI_PLACES=464, PETRI_TRANSITIONS=590} [2024-06-04 16:09:30,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-04 16:09:30,469 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 590 transitions, 8330 flow [2024-06-04 16:09:30,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:30,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:30,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:30,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 16:09:30,470 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:30,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:30,470 INFO L85 PathProgramCache]: Analyzing trace with hash 727498313, now seen corresponding path program 2 times [2024-06-04 16:09:30,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:30,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089023291] [2024-06-04 16:09:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:30,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:30,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:30,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089023291] [2024-06-04 16:09:30,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089023291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:30,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:30,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:30,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364883893] [2024-06-04 16:09:30,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:30,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:30,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:30,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:30,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 590 transitions, 8330 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:30,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:30,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:30,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:32,654 INFO L124 PetriNetUnfolderBase]: 3627/6099 cut-off events. [2024-06-04 16:09:32,654 INFO L125 PetriNetUnfolderBase]: For 498413/498423 co-relation queries the response was YES. [2024-06-04 16:09:32,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45415 conditions, 6099 events. 3627/6099 cut-off events. For 498413/498423 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 41963 event pairs, 808 based on Foata normal form. 16/6115 useless extension candidates. Maximal degree in co-relation 45220. Up to 5297 conditions per place. [2024-06-04 16:09:32,746 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 522 selfloop transitions, 90 changer transitions 0/618 dead transitions. [2024-06-04 16:09:32,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 618 transitions, 9965 flow [2024-06-04 16:09:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:09:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:09:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-04 16:09:32,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-04 16:09:32,747 INFO L175 Difference]: Start difference. First operand has 464 places, 590 transitions, 8330 flow. Second operand 10 states and 213 transitions. [2024-06-04 16:09:32,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 618 transitions, 9965 flow [2024-06-04 16:09:36,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 618 transitions, 9751 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:09:36,712 INFO L231 Difference]: Finished difference. Result has 469 places, 593 transitions, 8384 flow [2024-06-04 16:09:36,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8117, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8384, PETRI_PLACES=469, PETRI_TRANSITIONS=593} [2024-06-04 16:09:36,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-04 16:09:36,713 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 593 transitions, 8384 flow [2024-06-04 16:09:36,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:36,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:36,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:36,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 16:09:36,713 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:36,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash 640810223, now seen corresponding path program 3 times [2024-06-04 16:09:36,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:36,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060561681] [2024-06-04 16:09:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:36,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:37,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:37,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060561681] [2024-06-04 16:09:37,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060561681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:37,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:37,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964273126] [2024-06-04 16:09:37,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:37,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:37,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:37,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:37,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:37,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:37,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 593 transitions, 8384 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:37,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:37,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:37,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:38,640 INFO L124 PetriNetUnfolderBase]: 3609/6075 cut-off events. [2024-06-04 16:09:38,640 INFO L125 PetriNetUnfolderBase]: For 469309/469319 co-relation queries the response was YES. [2024-06-04 16:09:38,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44312 conditions, 6075 events. 3609/6075 cut-off events. For 469309/469319 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 41840 event pairs, 816 based on Foata normal form. 18/6093 useless extension candidates. Maximal degree in co-relation 44115. Up to 5351 conditions per place. [2024-06-04 16:09:38,727 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 523 selfloop transitions, 84 changer transitions 0/613 dead transitions. [2024-06-04 16:09:38,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 613 transitions, 9690 flow [2024-06-04 16:09:38,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-04 16:09:38,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 16:09:38,729 INFO L175 Difference]: Start difference. First operand has 469 places, 593 transitions, 8384 flow. Second operand 9 states and 192 transitions. [2024-06-04 16:09:38,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 613 transitions, 9690 flow [2024-06-04 16:09:42,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 613 transitions, 9551 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:42,317 INFO L231 Difference]: Finished difference. Result has 471 places, 593 transitions, 8423 flow [2024-06-04 16:09:42,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8245, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8423, PETRI_PLACES=471, PETRI_TRANSITIONS=593} [2024-06-04 16:09:42,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-04 16:09:42,318 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 593 transitions, 8423 flow [2024-06-04 16:09:42,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:42,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:42,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:42,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 16:09:42,318 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:42,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:42,318 INFO L85 PathProgramCache]: Analyzing trace with hash 727497941, now seen corresponding path program 3 times [2024-06-04 16:09:42,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:42,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951082449] [2024-06-04 16:09:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:42,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:42,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:42,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951082449] [2024-06-04 16:09:42,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951082449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:42,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:42,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:42,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615066719] [2024-06-04 16:09:42,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:42,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:42,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:42,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:42,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:42,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:42,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 593 transitions, 8423 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:42,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:42,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:42,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:44,395 INFO L124 PetriNetUnfolderBase]: 3629/6107 cut-off events. [2024-06-04 16:09:44,395 INFO L125 PetriNetUnfolderBase]: For 456267/456277 co-relation queries the response was YES. [2024-06-04 16:09:44,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44524 conditions, 6107 events. 3629/6107 cut-off events. For 456267/456277 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 42114 event pairs, 812 based on Foata normal form. 16/6119 useless extension candidates. Maximal degree in co-relation 44326. Up to 5205 conditions per place. [2024-06-04 16:09:44,484 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 491 selfloop transitions, 130 changer transitions 0/627 dead transitions. [2024-06-04 16:09:44,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 627 transitions, 9829 flow [2024-06-04 16:09:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:09:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:09:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 16:09:44,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-04 16:09:44,485 INFO L175 Difference]: Start difference. First operand has 471 places, 593 transitions, 8423 flow. Second operand 10 states and 219 transitions. [2024-06-04 16:09:44,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 627 transitions, 9829 flow [2024-06-04 16:09:47,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 627 transitions, 9667 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:47,651 INFO L231 Difference]: Finished difference. Result has 474 places, 594 transitions, 8542 flow [2024-06-04 16:09:47,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8261, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8542, PETRI_PLACES=474, PETRI_TRANSITIONS=594} [2024-06-04 16:09:47,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-04 16:09:47,652 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 594 transitions, 8542 flow [2024-06-04 16:09:47,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:47,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:47,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:47,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-04 16:09:47,652 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:47,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash -172283289, now seen corresponding path program 4 times [2024-06-04 16:09:47,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:47,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189342145] [2024-06-04 16:09:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:48,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:48,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189342145] [2024-06-04 16:09:48,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189342145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:48,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:48,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185688562] [2024-06-04 16:09:48,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:48,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:48,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:48,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 594 transitions, 8542 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:48,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:48,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:48,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:49,666 INFO L124 PetriNetUnfolderBase]: 3657/6155 cut-off events. [2024-06-04 16:09:49,666 INFO L125 PetriNetUnfolderBase]: For 477951/477961 co-relation queries the response was YES. [2024-06-04 16:09:49,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45184 conditions, 6155 events. 3657/6155 cut-off events. For 477951/477961 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 42520 event pairs, 826 based on Foata normal form. 18/6173 useless extension candidates. Maximal degree in co-relation 44985. Up to 5464 conditions per place. [2024-06-04 16:09:49,761 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 546 selfloop transitions, 61 changer transitions 0/613 dead transitions. [2024-06-04 16:09:49,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 613 transitions, 9873 flow [2024-06-04 16:09:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:09:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:09:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-04 16:09:49,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-04 16:09:49,762 INFO L175 Difference]: Start difference. First operand has 474 places, 594 transitions, 8542 flow. Second operand 7 states and 157 transitions. [2024-06-04 16:09:49,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 613 transitions, 9873 flow [2024-06-04 16:09:53,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 613 transitions, 9612 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:53,844 INFO L231 Difference]: Finished difference. Result has 473 places, 595 transitions, 8444 flow [2024-06-04 16:09:53,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8281, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8444, PETRI_PLACES=473, PETRI_TRANSITIONS=595} [2024-06-04 16:09:53,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-04 16:09:53,845 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 595 transitions, 8444 flow [2024-06-04 16:09:53,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:53,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:53,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:53,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-04 16:09:53,846 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:53,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:53,846 INFO L85 PathProgramCache]: Analyzing trace with hash -166920909, now seen corresponding path program 5 times [2024-06-04 16:09:53,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:53,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265006199] [2024-06-04 16:09:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:53,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:54,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:54,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265006199] [2024-06-04 16:09:54,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265006199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:54,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:54,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:54,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637858760] [2024-06-04 16:09:54,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:54,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:54,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:54,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:09:54,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 595 transitions, 8444 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:54,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:54,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:09:54,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:55,944 INFO L124 PetriNetUnfolderBase]: 3685/6203 cut-off events. [2024-06-04 16:09:55,944 INFO L125 PetriNetUnfolderBase]: For 486062/486072 co-relation queries the response was YES. [2024-06-04 16:09:56,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45485 conditions, 6203 events. 3685/6203 cut-off events. For 486062/486072 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 42871 event pairs, 832 based on Foata normal form. 18/6221 useless extension candidates. Maximal degree in co-relation 45285. Up to 5508 conditions per place. [2024-06-04 16:09:56,038 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 548 selfloop transitions, 61 changer transitions 0/615 dead transitions. [2024-06-04 16:09:56,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 615 transitions, 9783 flow [2024-06-04 16:09:56,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 16:09:56,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:09:56,039 INFO L175 Difference]: Start difference. First operand has 473 places, 595 transitions, 8444 flow. Second operand 8 states and 174 transitions. [2024-06-04 16:09:56,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 615 transitions, 9783 flow [2024-06-04 16:09:59,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 615 transitions, 9655 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:09:59,619 INFO L231 Difference]: Finished difference. Result has 476 places, 596 transitions, 8481 flow [2024-06-04 16:09:59,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8316, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8481, PETRI_PLACES=476, PETRI_TRANSITIONS=596} [2024-06-04 16:09:59,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-04 16:09:59,619 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 596 transitions, 8481 flow [2024-06-04 16:09:59,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:59,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:59,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:59,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-04 16:09:59,620 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:59,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:59,620 INFO L85 PathProgramCache]: Analyzing trace with hash -172431531, now seen corresponding path program 4 times [2024-06-04 16:09:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:59,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110746] [2024-06-04 16:09:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:00,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:00,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110746] [2024-06-04 16:10:00,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:00,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:00,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:00,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178108478] [2024-06-04 16:10:00,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:00,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:00,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:00,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:00,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:00,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:00,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 596 transitions, 8481 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:00,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:00,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:00,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:01,674 INFO L124 PetriNetUnfolderBase]: 3672/6184 cut-off events. [2024-06-04 16:10:01,674 INFO L125 PetriNetUnfolderBase]: For 441033/441043 co-relation queries the response was YES. [2024-06-04 16:10:01,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44714 conditions, 6184 events. 3672/6184 cut-off events. For 441033/441043 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 42813 event pairs, 718 based on Foata normal form. 16/6200 useless extension candidates. Maximal degree in co-relation 44513. Up to 4939 conditions per place. [2024-06-04 16:10:01,763 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 515 selfloop transitions, 108 changer transitions 0/629 dead transitions. [2024-06-04 16:10:01,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 629 transitions, 9879 flow [2024-06-04 16:10:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:10:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:10:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:10:01,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-04 16:10:01,764 INFO L175 Difference]: Start difference. First operand has 476 places, 596 transitions, 8481 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:10:01,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 629 transitions, 9879 flow [2024-06-04 16:10:04,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 629 transitions, 9745 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:04,847 INFO L231 Difference]: Finished difference. Result has 477 places, 596 transitions, 8571 flow [2024-06-04 16:10:04,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8347, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8571, PETRI_PLACES=477, PETRI_TRANSITIONS=596} [2024-06-04 16:10:04,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-04 16:10:04,848 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 596 transitions, 8571 flow [2024-06-04 16:10:04,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:04,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:04,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:04,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-04 16:10:04,848 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:04,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash -172431159, now seen corresponding path program 6 times [2024-06-04 16:10:04,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:04,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660162652] [2024-06-04 16:10:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:04,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:05,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:05,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660162652] [2024-06-04 16:10:05,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660162652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:05,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:05,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:05,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128874393] [2024-06-04 16:10:05,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:05,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:05,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:05,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:05,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:05,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 596 transitions, 8571 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:05,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:05,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:05,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:07,047 INFO L124 PetriNetUnfolderBase]: 3717/6255 cut-off events. [2024-06-04 16:10:07,047 INFO L125 PetriNetUnfolderBase]: For 450259/450269 co-relation queries the response was YES. [2024-06-04 16:10:07,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45414 conditions, 6255 events. 3717/6255 cut-off events. For 450259/450269 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 43165 event pairs, 756 based on Foata normal form. 16/6271 useless extension candidates. Maximal degree in co-relation 45212. Up to 5389 conditions per place. [2024-06-04 16:10:07,136 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 550 selfloop transitions, 69 changer transitions 0/625 dead transitions. [2024-06-04 16:10:07,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 625 transitions, 10027 flow [2024-06-04 16:10:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:10:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:10:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:10:07,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 16:10:07,137 INFO L175 Difference]: Start difference. First operand has 477 places, 596 transitions, 8571 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:10:07,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 625 transitions, 10027 flow [2024-06-04 16:10:11,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 625 transitions, 9719 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:10:11,045 INFO L231 Difference]: Finished difference. Result has 477 places, 601 transitions, 8536 flow [2024-06-04 16:10:11,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8274, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8536, PETRI_PLACES=477, PETRI_TRANSITIONS=601} [2024-06-04 16:10:11,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-04 16:10:11,045 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 601 transitions, 8536 flow [2024-06-04 16:10:11,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:11,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:11,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:11,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-04 16:10:11,046 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:11,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:11,046 INFO L85 PathProgramCache]: Analyzing trace with hash -166705893, now seen corresponding path program 1 times [2024-06-04 16:10:11,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:11,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524440373] [2024-06-04 16:10:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:11,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:11,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524440373] [2024-06-04 16:10:11,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524440373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:11,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:11,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:11,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861626049] [2024-06-04 16:10:11,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:11,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:11,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:11,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:11,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 601 transitions, 8536 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:11,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:11,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:11,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:13,396 INFO L124 PetriNetUnfolderBase]: 3753/6319 cut-off events. [2024-06-04 16:10:13,396 INFO L125 PetriNetUnfolderBase]: For 444347/444357 co-relation queries the response was YES. [2024-06-04 16:10:13,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45580 conditions, 6319 events. 3753/6319 cut-off events. For 444347/444357 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 43814 event pairs, 743 based on Foata normal form. 16/6335 useless extension candidates. Maximal degree in co-relation 45377. Up to 5382 conditions per place. [2024-06-04 16:10:13,492 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 531 selfloop transitions, 94 changer transitions 0/631 dead transitions. [2024-06-04 16:10:13,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 631 transitions, 9978 flow [2024-06-04 16:10:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:10:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:10:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:10:13,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:10:13,493 INFO L175 Difference]: Start difference. First operand has 477 places, 601 transitions, 8536 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:10:13,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 631 transitions, 9978 flow [2024-06-04 16:10:16,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 631 transitions, 9845 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:10:16,156 INFO L231 Difference]: Finished difference. Result has 481 places, 606 transitions, 8699 flow [2024-06-04 16:10:16,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8403, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8699, PETRI_PLACES=481, PETRI_TRANSITIONS=606} [2024-06-04 16:10:16,157 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-04 16:10:16,157 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 606 transitions, 8699 flow [2024-06-04 16:10:16,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:16,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:16,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:16,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-04 16:10:16,158 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:16,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:16,158 INFO L85 PathProgramCache]: Analyzing trace with hash -166705707, now seen corresponding path program 1 times [2024-06-04 16:10:16,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:16,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977656198] [2024-06-04 16:10:16,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:16,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:16,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977656198] [2024-06-04 16:10:16,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977656198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:16,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:16,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:16,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301474087] [2024-06-04 16:10:16,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:16,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:16,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 606 transitions, 8699 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:16,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:16,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:16,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:18,666 INFO L124 PetriNetUnfolderBase]: 3773/6351 cut-off events. [2024-06-04 16:10:18,666 INFO L125 PetriNetUnfolderBase]: For 445288/445298 co-relation queries the response was YES. [2024-06-04 16:10:18,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45981 conditions, 6351 events. 3773/6351 cut-off events. For 445288/445298 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 43947 event pairs, 802 based on Foata normal form. 16/6367 useless extension candidates. Maximal degree in co-relation 45777. Up to 5482 conditions per place. [2024-06-04 16:10:18,762 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 548 selfloop transitions, 75 changer transitions 0/629 dead transitions. [2024-06-04 16:10:18,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 629 transitions, 10087 flow [2024-06-04 16:10:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:10:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:10:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-04 16:10:18,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-04 16:10:18,763 INFO L175 Difference]: Start difference. First operand has 481 places, 606 transitions, 8699 flow. Second operand 8 states and 177 transitions. [2024-06-04 16:10:18,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 629 transitions, 10087 flow [2024-06-04 16:10:21,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 629 transitions, 9917 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:21,507 INFO L231 Difference]: Finished difference. Result has 483 places, 607 transitions, 8715 flow [2024-06-04 16:10:21,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8529, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8715, PETRI_PLACES=483, PETRI_TRANSITIONS=607} [2024-06-04 16:10:21,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-04 16:10:21,507 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 607 transitions, 8715 flow [2024-06-04 16:10:21,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:21,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:21,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:21,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-04 16:10:21,508 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:21,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:21,508 INFO L85 PathProgramCache]: Analyzing trace with hash 463974589, now seen corresponding path program 2 times [2024-06-04 16:10:21,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:21,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017736988] [2024-06-04 16:10:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:21,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:22,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:22,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017736988] [2024-06-04 16:10:22,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017736988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:22,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:22,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:22,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449066436] [2024-06-04 16:10:22,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:22,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:22,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:22,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:22,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:22,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:22,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 607 transitions, 8715 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:22,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:22,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:22,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:23,886 INFO L124 PetriNetUnfolderBase]: 3793/6383 cut-off events. [2024-06-04 16:10:23,886 INFO L125 PetriNetUnfolderBase]: For 446535/446545 co-relation queries the response was YES. [2024-06-04 16:10:23,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46194 conditions, 6383 events. 3793/6383 cut-off events. For 446535/446545 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 44170 event pairs, 806 based on Foata normal form. 16/6399 useless extension candidates. Maximal degree in co-relation 45990. Up to 5736 conditions per place. [2024-06-04 16:10:23,980 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 578 selfloop transitions, 40 changer transitions 0/624 dead transitions. [2024-06-04 16:10:23,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 624 transitions, 10041 flow [2024-06-04 16:10:23,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:10:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:10:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-04 16:10:23,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-04 16:10:23,981 INFO L175 Difference]: Start difference. First operand has 483 places, 607 transitions, 8715 flow. Second operand 7 states and 151 transitions. [2024-06-04 16:10:23,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 624 transitions, 10041 flow [2024-06-04 16:10:26,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 624 transitions, 9874 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:10:26,731 INFO L231 Difference]: Finished difference. Result has 483 places, 608 transitions, 8662 flow [2024-06-04 16:10:26,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8548, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8662, PETRI_PLACES=483, PETRI_TRANSITIONS=608} [2024-06-04 16:10:26,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-04 16:10:26,732 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 608 transitions, 8662 flow [2024-06-04 16:10:26,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:26,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:26,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:26,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-04 16:10:26,732 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:26,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash 463854619, now seen corresponding path program 3 times [2024-06-04 16:10:26,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:26,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128875722] [2024-06-04 16:10:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:26,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:27,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128875722] [2024-06-04 16:10:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128875722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:27,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:27,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:27,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893652971] [2024-06-04 16:10:27,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:27,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:27,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:27,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:27,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 608 transitions, 8662 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:27,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:27,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:27,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:28,793 INFO L124 PetriNetUnfolderBase]: 3813/6417 cut-off events. [2024-06-04 16:10:28,794 INFO L125 PetriNetUnfolderBase]: For 445763/445765 co-relation queries the response was YES. [2024-06-04 16:10:28,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46254 conditions, 6417 events. 3813/6417 cut-off events. For 445763/445765 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 44440 event pairs, 839 based on Foata normal form. 8/6424 useless extension candidates. Maximal degree in co-relation 46050. Up to 5046 conditions per place. [2024-06-04 16:10:28,893 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 502 selfloop transitions, 122 changer transitions 0/630 dead transitions. [2024-06-04 16:10:28,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 630 transitions, 10090 flow [2024-06-04 16:10:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:10:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:10:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-04 16:10:28,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-04 16:10:28,894 INFO L175 Difference]: Start difference. First operand has 483 places, 608 transitions, 8662 flow. Second operand 7 states and 157 transitions. [2024-06-04 16:10:28,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 630 transitions, 10090 flow [2024-06-04 16:10:32,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 630 transitions, 9890 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 16:10:32,169 INFO L231 Difference]: Finished difference. Result has 483 places, 609 transitions, 8742 flow [2024-06-04 16:10:32,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8462, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8742, PETRI_PLACES=483, PETRI_TRANSITIONS=609} [2024-06-04 16:10:32,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-04 16:10:32,170 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 609 transitions, 8742 flow [2024-06-04 16:10:32,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:32,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:32,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:32,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-04 16:10:32,170 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:32,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2040804551, now seen corresponding path program 27 times [2024-06-04 16:10:32,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:32,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913427986] [2024-06-04 16:10:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:32,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:32,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:32,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913427986] [2024-06-04 16:10:32,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913427986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:32,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:32,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:10:32,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362326634] [2024-06-04 16:10:32,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:32,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:10:32,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:32,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:10:32,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:10:32,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:10:32,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 609 transitions, 8742 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:32,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:32,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:10:32,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand