./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.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/safe031_tso.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/safe031_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe031_tso.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 16:15:06,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:15:06,223 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:15:06,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:15:06,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:15:06,260 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:15:06,260 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:15:06,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:15:06,261 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:15:06,264 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:15:06,264 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:15:06,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:15:06,265 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:15:06,266 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:15:06,266 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:15:06,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:15:06,266 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:15:06,267 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:15:06,267 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:15:06,267 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:15:06,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:15:06,268 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:15:06,268 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:15:06,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:15:06,268 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:15:06,268 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:15:06,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:15:06,269 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:15:06,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:15:06,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:15:06,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:15:06,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:15:06,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:15:06,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:15:06,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:15:06,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:15:06,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:15:06,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:15:06,272 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:15:06,272 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:15:06,272 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:15:06,272 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:15:06,273 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:15:06,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:15:06,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:15:06,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:15:06,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:15:06,476 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:15:06,476 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:15:06,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe031_tso.yml/witness.yml [2024-06-04 16:15:06,612 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:15:06,612 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:15:06,613 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2024-06-04 16:15:07,694 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:15:07,883 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:15:07,883 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2024-06-04 16:15:07,892 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa41ebcbc/80f47a5950aa4e6da6b4811674c5a3c5/FLAG10d6b7973 [2024-06-04 16:15:08,261 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa41ebcbc/80f47a5950aa4e6da6b4811674c5a3c5 [2024-06-04 16:15:08,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:15:08,263 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:15:08,265 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:15:08,266 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:15:08,269 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:15:08,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:06" (1/2) ... [2024-06-04 16:15:08,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f4909c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:08, skipping insertion in model container [2024-06-04 16:15:08,271 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:06" (1/2) ... [2024-06-04 16:15:08,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b870b1a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:15:08, skipping insertion in model container [2024-06-04 16:15:08,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:15:08" (2/2) ... [2024-06-04 16:15:08,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f4909c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08, skipping insertion in model container [2024-06-04 16:15:08,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:15:08" (2/2) ... [2024-06-04 16:15:08,273 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:15:08,311 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:15:08,312 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && x <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-04 16:15:08,312 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && x <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-04 16:15:08,312 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && x <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-04 16:15:08,313 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:15:08,313 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-04 16:15:08,350 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:15:08,663 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:15:08,671 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:15:08,766 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:15:08,807 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:15:08,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08 WrapperNode [2024-06-04 16:15:08,808 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:15:08,808 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:15:08,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:15:08,809 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:15:08,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,823 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,847 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-04 16:15:08,848 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:15:08,849 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:15:08,849 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:15:08,849 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:15:08,857 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,860 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,879 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 16:15:08,879 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,879 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,884 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,887 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:15:08,891 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:15:08,891 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:15:08,891 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:15:08,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (1/1) ... [2024-06-04 16:15:08,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:15:08,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:15:08,930 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 16:15:08,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 16:15:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:15:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:15:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:15:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:15:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:15:08,982 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:15:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:15:08,982 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:15:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:15:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:15:08,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:15:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:15:08,984 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 16:15:09,092 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:15:09,094 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:15:09,350 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:15:09,354 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:15:09,446 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:15:09,446 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:15:09,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:15:09 BoogieIcfgContainer [2024-06-04 16:15:09,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:15:09,449 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:15:09,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:15:09,452 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:15:09,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:15:06" (1/4) ... [2024-06-04 16:15:09,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a934926 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:15:09, skipping insertion in model container [2024-06-04 16:15:09,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:15:08" (2/4) ... [2024-06-04 16:15:09,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a934926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:15:09, skipping insertion in model container [2024-06-04 16:15:09,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:15:08" (3/4) ... [2024-06-04 16:15:09,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a934926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:15:09, skipping insertion in model container [2024-06-04 16:15:09,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:15:09" (4/4) ... [2024-06-04 16:15:09,455 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_tso.i [2024-06-04 16:15:09,468 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:15:09,468 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:15:09,469 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:15:09,510 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:15:09,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 16:15:09,564 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 16:15:09,564 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:15:09,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:15:09,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 16:15:09,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 16:15:09,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:15:09,585 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;@6e4b9969, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:15:09,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:15:09,588 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:15:09,588 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:15:09,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:15:09,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:09,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:15:09,590 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 16:15:09,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:09,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1782944907, now seen corresponding path program 1 times [2024-06-04 16:15:09,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:09,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820357024] [2024-06-04 16:15:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:10,082 INFO 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 16:15:10,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:10,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820357024] [2024-06-04 16:15:10,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820357024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:10,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:10,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:15:10,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461846294] [2024-06-04 16:15:10,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:10,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:15:10,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:10,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:15:10,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:15:10,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:15:10,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:10,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:15:10,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:10,378 INFO L124 PetriNetUnfolderBase]: 736/1214 cut-off events. [2024-06-04 16:15:10,378 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-04 16:15:10,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 1214 events. 736/1214 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6177 event pairs, 471 based on Foata normal form. 1/1159 useless extension candidates. Maximal degree in co-relation 2386. Up to 1122 conditions per place. [2024-06-04 16:15:10,392 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 16:15:10,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-04 16:15:10,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:15:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:15:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-04 16:15:10,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-06-04 16:15:10,403 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 83 transitions. [2024-06-04 16:15:10,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-04 16:15:10,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:10,408 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 16:15:10,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-04 16:15:10,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 16:15:10,415 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 16:15:10,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:10,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:10,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:15:10,416 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 16:15:10,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash 281906836, now seen corresponding path program 1 times [2024-06-04 16:15:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:10,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466235962] [2024-06-04 16:15:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:10,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:10,690 INFO 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 16:15:10,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:10,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466235962] [2024-06-04 16:15:10,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466235962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:10,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:10,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:15:10,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756900933] [2024-06-04 16:15:10,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:10,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:15:10,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:10,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:15:10,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:15:10,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:15:10,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:10,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:15:10,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:10,895 INFO L124 PetriNetUnfolderBase]: 730/1205 cut-off events. [2024-06-04 16:15:10,895 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-06-04 16:15:10,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2742 conditions, 1205 events. 730/1205 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6134 event pairs, 403 based on Foata normal form. 3/1182 useless extension candidates. Maximal degree in co-relation 2727. Up to 1098 conditions per place. [2024-06-04 16:15:10,902 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-04 16:15:10,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-04 16:15:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-06-04 16:15:10,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-04 16:15:10,907 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 108 transitions. [2024-06-04 16:15:10,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-04 16:15:10,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:15:10,910 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-04 16:15:10,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-04 16:15:10,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-04 16:15:10,911 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-04 16:15:10,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:10,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:10,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:15:10,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:10,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1529058956, now seen corresponding path program 1 times [2024-06-04 16:15:10,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:10,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871240407] [2024-06-04 16:15:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:10,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:11,296 INFO 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 16:15:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871240407] [2024-06-04 16:15:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871240407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:11,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:11,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:15:11,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177259561] [2024-06-04 16:15:11,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:15:11,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:15:11,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:15:11,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:11,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:11,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:11,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:11,464 INFO L124 PetriNetUnfolderBase]: 929/1500 cut-off events. [2024-06-04 16:15:11,464 INFO L125 PetriNetUnfolderBase]: For 749/749 co-relation queries the response was YES. [2024-06-04 16:15:11,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3813 conditions, 1500 events. 929/1500 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7391 event pairs, 537 based on Foata normal form. 2/1476 useless extension candidates. Maximal degree in co-relation 3796. Up to 1397 conditions per place. [2024-06-04 16:15:11,473 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-04 16:15:11,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 270 flow [2024-06-04 16:15:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-04 16:15:11,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 16:15:11,477 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 4 states and 101 transitions. [2024-06-04 16:15:11,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 270 flow [2024-06-04 16:15:11,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:11,481 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 164 flow [2024-06-04 16:15:11,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-04 16:15:11,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-04 16:15:11,482 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 164 flow [2024-06-04 16:15:11,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:11,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:11,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:15:11,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:11,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1136654126, now seen corresponding path program 1 times [2024-06-04 16:15:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:11,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678926483] [2024-06-04 16:15:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:11,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:11,712 INFO 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 16:15:11,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:11,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678926483] [2024-06-04 16:15:11,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678926483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:11,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:11,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:11,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488651544] [2024-06-04 16:15:11,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:11,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:11,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:11,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:11,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 164 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 16:15:11,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:11,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:11,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:11,965 INFO L124 PetriNetUnfolderBase]: 920/1491 cut-off events. [2024-06-04 16:15:11,965 INFO L125 PetriNetUnfolderBase]: For 1286/1286 co-relation queries the response was YES. [2024-06-04 16:15:11,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 1491 events. 920/1491 cut-off events. For 1286/1286 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7417 event pairs, 290 based on Foata normal form. 6/1479 useless extension candidates. Maximal degree in co-relation 4112. Up to 1331 conditions per place. [2024-06-04 16:15:11,972 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-04 16:15:11,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 378 flow [2024-06-04 16:15:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:15:11,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:15:11,974 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 164 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:15:11,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 378 flow [2024-06-04 16:15:11,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 362 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:11,976 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 207 flow [2024-06-04 16:15:11,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-04 16:15:11,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-04 16:15:11,977 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 207 flow [2024-06-04 16:15:11,978 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 16:15:11,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:11,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:11,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:15:11,978 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 16:15:11,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash 156188673, now seen corresponding path program 1 times [2024-06-04 16:15:11,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:11,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294614329] [2024-06-04 16:15:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:12,185 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 16:15:12,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:12,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294614329] [2024-06-04 16:15:12,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294614329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:12,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:12,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:12,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195535528] [2024-06-04 16:15:12,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:12,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:12,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:12,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:12,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 207 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 16:15:12,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:12,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:12,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:12,342 INFO L124 PetriNetUnfolderBase]: 922/1502 cut-off events. [2024-06-04 16:15:12,342 INFO L125 PetriNetUnfolderBase]: For 2164/2164 co-relation queries the response was YES. [2024-06-04 16:15:12,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 1502 events. 922/1502 cut-off events. For 2164/2164 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7422 event pairs, 359 based on Foata normal form. 3/1504 useless extension candidates. Maximal degree in co-relation 4516. Up to 1357 conditions per place. [2024-06-04 16:15:12,380 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-04 16:15:12,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 449 flow [2024-06-04 16:15:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-04 16:15:12,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-04 16:15:12,381 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 207 flow. Second operand 5 states and 127 transitions. [2024-06-04 16:15:12,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 449 flow [2024-06-04 16:15:12,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 420 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:12,384 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 297 flow [2024-06-04 16:15:12,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2024-06-04 16:15:12,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-04 16:15:12,385 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 297 flow [2024-06-04 16:15:12,386 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 16:15:12,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:12,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:12,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:15:12,386 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 16:15:12,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1148260319, now seen corresponding path program 1 times [2024-06-04 16:15:12,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:12,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126008811] [2024-06-04 16:15:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:12,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:12,585 INFO 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 16:15:12,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:12,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126008811] [2024-06-04 16:15:12,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126008811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:12,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:12,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:12,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192688794] [2024-06-04 16:15:12,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:12,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:12,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:12,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:12,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:12,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:12,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:12,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:12,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:12,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:12,791 INFO L124 PetriNetUnfolderBase]: 933/1547 cut-off events. [2024-06-04 16:15:12,791 INFO L125 PetriNetUnfolderBase]: For 3582/3586 co-relation queries the response was YES. [2024-06-04 16:15:12,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5242 conditions, 1547 events. 933/1547 cut-off events. For 3582/3586 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7817 event pairs, 352 based on Foata normal form. 6/1551 useless extension candidates. Maximal degree in co-relation 5219. Up to 1366 conditions per place. [2024-06-04 16:15:12,799 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 61 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-04 16:15:12,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 563 flow [2024-06-04 16:15:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 16:15:12,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-04 16:15:12,800 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 297 flow. Second operand 5 states and 128 transitions. [2024-06-04 16:15:12,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 563 flow [2024-06-04 16:15:12,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 551 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-04 16:15:12,804 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 373 flow [2024-06-04 16:15:12,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=373, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-04 16:15:12,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-04 16:15:12,805 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 373 flow [2024-06-04 16:15:12,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:12,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:12,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:12,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:15:12,806 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 16:15:12,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:12,806 INFO L85 PathProgramCache]: Analyzing trace with hash 571898403, now seen corresponding path program 2 times [2024-06-04 16:15:12,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:12,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659790223] [2024-06-04 16:15:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:12,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:12,988 INFO 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 16:15:12,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:12,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659790223] [2024-06-04 16:15:12,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659790223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:12,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:12,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:12,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732229032] [2024-06-04 16:15:12,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:12,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:12,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:12,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:12,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:13,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:13,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 373 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:13,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:13,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:13,203 INFO L124 PetriNetUnfolderBase]: 928/1539 cut-off events. [2024-06-04 16:15:13,204 INFO L125 PetriNetUnfolderBase]: For 4728/4728 co-relation queries the response was YES. [2024-06-04 16:15:13,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5602 conditions, 1539 events. 928/1539 cut-off events. For 4728/4728 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7686 event pairs, 348 based on Foata normal form. 2/1539 useless extension candidates. Maximal degree in co-relation 5576. Up to 1361 conditions per place. [2024-06-04 16:15:13,213 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 66 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2024-06-04 16:15:13,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 603 flow [2024-06-04 16:15:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:15:13,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 16:15:13,214 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 373 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:15:13,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 603 flow [2024-06-04 16:15:13,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 567 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-04 16:15:13,220 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 377 flow [2024-06-04 16:15:13,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-04 16:15:13,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-04 16:15:13,221 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 377 flow [2024-06-04 16:15:13,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:13,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:13,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:15:13,221 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 16:15:13,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2146762988, now seen corresponding path program 1 times [2024-06-04 16:15:13,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:13,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97804752] [2024-06-04 16:15:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:13,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:13,409 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 16:15:13,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:13,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97804752] [2024-06-04 16:15:13,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97804752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:13,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:13,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:13,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710144983] [2024-06-04 16:15:13,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:13,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:13,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:13,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:13,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:13,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:13,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 377 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:13,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:13,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:13,651 INFO L124 PetriNetUnfolderBase]: 1001/1640 cut-off events. [2024-06-04 16:15:13,651 INFO L125 PetriNetUnfolderBase]: For 5704/5704 co-relation queries the response was YES. [2024-06-04 16:15:13,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6045 conditions, 1640 events. 1001/1640 cut-off events. For 5704/5704 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8281 event pairs, 328 based on Foata normal form. 4/1642 useless extension candidates. Maximal degree in co-relation 6017. Up to 1286 conditions per place. [2024-06-04 16:15:13,662 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 72 selfloop transitions, 35 changer transitions 0/114 dead transitions. [2024-06-04 16:15:13,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 861 flow [2024-06-04 16:15:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 16:15:13,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-04 16:15:13,663 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 377 flow. Second operand 7 states and 183 transitions. [2024-06-04 16:15:13,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 861 flow [2024-06-04 16:15:13,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 114 transitions, 817 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:13,670 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 556 flow [2024-06-04 16:15:13,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2024-06-04 16:15:13,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-04 16:15:13,671 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 556 flow [2024-06-04 16:15:13,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:13,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:13,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:15:13,672 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 16:15:13,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash 548982602, now seen corresponding path program 2 times [2024-06-04 16:15:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:13,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789057684] [2024-06-04 16:15:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:13,861 INFO 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 16:15:13,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:13,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789057684] [2024-06-04 16:15:13,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789057684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:13,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:13,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:13,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965399414] [2024-06-04 16:15:13,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:13,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:13,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:13,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:13,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:13,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:13,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 556 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:13,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:13,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:14,212 INFO L124 PetriNetUnfolderBase]: 1026/1687 cut-off events. [2024-06-04 16:15:14,212 INFO L125 PetriNetUnfolderBase]: For 8153/8153 co-relation queries the response was YES. [2024-06-04 16:15:14,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7184 conditions, 1687 events. 1026/1687 cut-off events. For 8153/8153 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8565 event pairs, 322 based on Foata normal form. 4/1690 useless extension candidates. Maximal degree in co-relation 7153. Up to 1311 conditions per place. [2024-06-04 16:15:14,225 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 82 selfloop transitions, 44 changer transitions 0/133 dead transitions. [2024-06-04 16:15:14,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 133 transitions, 1127 flow [2024-06-04 16:15:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-04 16:15:14,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:15:14,226 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 556 flow. Second operand 8 states and 208 transitions. [2024-06-04 16:15:14,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 133 transitions, 1127 flow [2024-06-04 16:15:14,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 133 transitions, 1074 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-04 16:15:14,239 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 762 flow [2024-06-04 16:15:14,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=762, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-04 16:15:14,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-04 16:15:14,240 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 762 flow [2024-06-04 16:15:14,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:14,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:14,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:15:14,241 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 16:15:14,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:14,241 INFO L85 PathProgramCache]: Analyzing trace with hash -482706588, now seen corresponding path program 3 times [2024-06-04 16:15:14,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:14,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136456167] [2024-06-04 16:15:14,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:14,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:14,428 INFO 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 16:15:14,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136456167] [2024-06-04 16:15:14,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136456167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:14,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:14,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:14,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002870383] [2024-06-04 16:15:14,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:14,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:14,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:14,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 762 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:14,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:14,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:14,699 INFO L124 PetriNetUnfolderBase]: 1051/1734 cut-off events. [2024-06-04 16:15:14,699 INFO L125 PetriNetUnfolderBase]: For 10617/10617 co-relation queries the response was YES. [2024-06-04 16:15:14,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8092 conditions, 1734 events. 1051/1734 cut-off events. For 10617/10617 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8968 event pairs, 321 based on Foata normal form. 4/1737 useless extension candidates. Maximal degree in co-relation 8056. Up to 1337 conditions per place. [2024-06-04 16:15:14,713 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 57 changer transitions 0/144 dead transitions. [2024-06-04 16:15:14,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1328 flow [2024-06-04 16:15:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-04 16:15:14,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-06-04 16:15:14,715 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 762 flow. Second operand 9 states and 229 transitions. [2024-06-04 16:15:14,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1328 flow [2024-06-04 16:15:14,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 1260 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:14,731 INFO L231 Difference]: Finished difference. Result has 88 places, 105 transitions, 977 flow [2024-06-04 16:15:14,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=977, PETRI_PLACES=88, PETRI_TRANSITIONS=105} [2024-06-04 16:15:14,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-04 16:15:14,732 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 105 transitions, 977 flow [2024-06-04 16:15:14,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:14,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:14,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:15:14,732 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:14,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:14,733 INFO L85 PathProgramCache]: Analyzing trace with hash -226498208, now seen corresponding path program 1 times [2024-06-04 16:15:14,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:14,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466585752] [2024-06-04 16:15:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:14,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:14,946 INFO 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 16:15:14,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:14,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466585752] [2024-06-04 16:15:14,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466585752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:14,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:14,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:14,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006466949] [2024-06-04 16:15:14,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:14,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:14,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:14,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:14,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 977 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 16:15:14,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:14,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:14,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:15,216 INFO L124 PetriNetUnfolderBase]: 1054/1758 cut-off events. [2024-06-04 16:15:15,216 INFO L125 PetriNetUnfolderBase]: For 13311/13311 co-relation queries the response was YES. [2024-06-04 16:15:15,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8624 conditions, 1758 events. 1054/1758 cut-off events. For 13311/13311 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9067 event pairs, 317 based on Foata normal form. 6/1763 useless extension candidates. Maximal degree in co-relation 8585. Up to 1518 conditions per place. [2024-06-04 16:15:15,231 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 104 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-06-04 16:15:15,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1353 flow [2024-06-04 16:15:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:15:15,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:15:15,233 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 977 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:15:15,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1353 flow [2024-06-04 16:15:15,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 130 transitions, 1266 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:15,251 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 978 flow [2024-06-04 16:15:15,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=978, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2024-06-04 16:15:15,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-04 16:15:15,252 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 978 flow [2024-06-04 16:15:15,252 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 16:15:15,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:15,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:15,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:15:15,253 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:15,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1423829980, now seen corresponding path program 1 times [2024-06-04 16:15:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:15,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678017227] [2024-06-04 16:15:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:15,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:15,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:15,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678017227] [2024-06-04 16:15:15,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678017227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:15,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:15,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:15:15,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103298916] [2024-06-04 16:15:15,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:15,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:15:15,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:15,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:15:15,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:15:15,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:15:15,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 978 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:15,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:15:15,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:15,669 INFO L124 PetriNetUnfolderBase]: 1011/1712 cut-off events. [2024-06-04 16:15:15,669 INFO L125 PetriNetUnfolderBase]: For 13648/13648 co-relation queries the response was YES. [2024-06-04 16:15:15,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8365 conditions, 1712 events. 1011/1712 cut-off events. For 13648/13648 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8939 event pairs, 334 based on Foata normal form. 1/1712 useless extension candidates. Maximal degree in co-relation 8325. Up to 1421 conditions per place. [2024-06-04 16:15:15,705 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 89 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2024-06-04 16:15:15,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 116 transitions, 1190 flow [2024-06-04 16:15:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-04 16:15:15,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 16:15:15,706 INFO L175 Difference]: Start difference. First operand has 89 places, 108 transitions, 978 flow. Second operand 4 states and 99 transitions. [2024-06-04 16:15:15,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 116 transitions, 1190 flow [2024-06-04 16:15:15,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 116 transitions, 1120 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:15,721 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 928 flow [2024-06-04 16:15:15,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=928, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2024-06-04 16:15:15,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-04 16:15:15,723 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 928 flow [2024-06-04 16:15:15,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:15,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:15,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:15:15,724 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 16:15:15,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash 323701376, now seen corresponding path program 1 times [2024-06-04 16:15:15,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:15,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723828286] [2024-06-04 16:15:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:15,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:15,938 INFO 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 16:15:15,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:15,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723828286] [2024-06-04 16:15:15,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723828286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:15,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:15,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:15,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269400751] [2024-06-04 16:15:15,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:15,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:15,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:15,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:15,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:15,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 928 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:15,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:15,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:16,221 INFO L124 PetriNetUnfolderBase]: 1062/1772 cut-off events. [2024-06-04 16:15:16,221 INFO L125 PetriNetUnfolderBase]: For 15005/15005 co-relation queries the response was YES. [2024-06-04 16:15:16,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8682 conditions, 1772 events. 1062/1772 cut-off events. For 15005/15005 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9153 event pairs, 319 based on Foata normal form. 2/1773 useless extension candidates. Maximal degree in co-relation 8641. Up to 1554 conditions per place. [2024-06-04 16:15:16,233 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 13 changer transitions 0/136 dead transitions. [2024-06-04 16:15:16,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 136 transitions, 1288 flow [2024-06-04 16:15:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:15:16,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:15:16,235 INFO L175 Difference]: Start difference. First operand has 89 places, 108 transitions, 928 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:15:16,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 136 transitions, 1288 flow [2024-06-04 16:15:16,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 136 transitions, 1268 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:16,253 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 986 flow [2024-06-04 16:15:16,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=986, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-04 16:15:16,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-04 16:15:16,254 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 986 flow [2024-06-04 16:15:16,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:16,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:16,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:16,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:15:16,255 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 16:15:16,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash 328462976, now seen corresponding path program 2 times [2024-06-04 16:15:16,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:16,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664945029] [2024-06-04 16:15:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:16,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:16,444 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 16:15:16,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:16,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664945029] [2024-06-04 16:15:16,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664945029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:16,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:16,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:16,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69856268] [2024-06-04 16:15:16,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:16,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:16,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:16,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:16,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 986 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:16,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:16,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:16,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:16,725 INFO L124 PetriNetUnfolderBase]: 1073/1798 cut-off events. [2024-06-04 16:15:16,726 INFO L125 PetriNetUnfolderBase]: For 17691/17695 co-relation queries the response was YES. [2024-06-04 16:15:16,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9168 conditions, 1798 events. 1073/1798 cut-off events. For 17691/17695 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9379 event pairs, 323 based on Foata normal form. 6/1803 useless extension candidates. Maximal degree in co-relation 9127. Up to 1523 conditions per place. [2024-06-04 16:15:16,741 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 109 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-06-04 16:15:16,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 141 transitions, 1452 flow [2024-06-04 16:15:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 16:15:16,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-04 16:15:16,742 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 986 flow. Second operand 6 states and 151 transitions. [2024-06-04 16:15:16,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 141 transitions, 1452 flow [2024-06-04 16:15:16,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 141 transitions, 1398 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:16,767 INFO L231 Difference]: Finished difference. Result has 94 places, 117 transitions, 1084 flow [2024-06-04 16:15:16,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1084, PETRI_PLACES=94, PETRI_TRANSITIONS=117} [2024-06-04 16:15:16,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-04 16:15:16,768 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 117 transitions, 1084 flow [2024-06-04 16:15:16,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:16,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:16,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:16,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:15:16,769 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 16:15:16,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:16,770 INFO L85 PathProgramCache]: Analyzing trace with hash -161414142, now seen corresponding path program 3 times [2024-06-04 16:15:16,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:16,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766536589] [2024-06-04 16:15:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:16,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:16,984 INFO 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 16:15:16,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:16,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766536589] [2024-06-04 16:15:16,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766536589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:16,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:16,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:16,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256668303] [2024-06-04 16:15:16,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:16,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:16,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:16,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:16,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:17,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:17,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 117 transitions, 1084 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:17,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:17,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:17,291 INFO L124 PetriNetUnfolderBase]: 1068/1790 cut-off events. [2024-06-04 16:15:17,292 INFO L125 PetriNetUnfolderBase]: For 20004/20004 co-relation queries the response was YES. [2024-06-04 16:15:17,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9426 conditions, 1790 events. 1068/1790 cut-off events. For 20004/20004 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9295 event pairs, 319 based on Foata normal form. 2/1791 useless extension candidates. Maximal degree in co-relation 9384. Up to 1518 conditions per place. [2024-06-04 16:15:17,303 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 114 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-06-04 16:15:17,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 147 transitions, 1440 flow [2024-06-04 16:15:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:15:17,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 16:15:17,305 INFO L175 Difference]: Start difference. First operand has 94 places, 117 transitions, 1084 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:15:17,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 147 transitions, 1440 flow [2024-06-04 16:15:17,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 147 transitions, 1362 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:17,328 INFO L231 Difference]: Finished difference. Result has 100 places, 117 transitions, 1066 flow [2024-06-04 16:15:17,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1066, PETRI_PLACES=100, PETRI_TRANSITIONS=117} [2024-06-04 16:15:17,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-04 16:15:17,329 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 117 transitions, 1066 flow [2024-06-04 16:15:17,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:17,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:17,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:15:17,330 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:17,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:17,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365619, now seen corresponding path program 1 times [2024-06-04 16:15:17,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:17,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443928508] [2024-06-04 16:15:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:17,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:17,548 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 16:15:17,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:17,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443928508] [2024-06-04 16:15:17,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443928508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:17,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:17,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:17,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715519425] [2024-06-04 16:15:17,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:17,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:17,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:17,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:17,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:15:17,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 117 transitions, 1066 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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 16:15:17,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:17,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:15:17,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:17,801 INFO L124 PetriNetUnfolderBase]: 1025/1749 cut-off events. [2024-06-04 16:15:17,802 INFO L125 PetriNetUnfolderBase]: For 20856/20866 co-relation queries the response was YES. [2024-06-04 16:15:17,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 1749 events. 1025/1749 cut-off events. For 20856/20866 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9176 event pairs, 310 based on Foata normal form. 3/1748 useless extension candidates. Maximal degree in co-relation 9210. Up to 1401 conditions per place. [2024-06-04 16:15:17,814 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 97 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-06-04 16:15:17,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 1444 flow [2024-06-04 16:15:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:17,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:17,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:15:17,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-04 16:15:17,815 INFO L175 Difference]: Start difference. First operand has 100 places, 117 transitions, 1066 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:15:17,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 1444 flow [2024-06-04 16:15:17,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1372 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:17,837 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 1134 flow [2024-06-04 16:15:17,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1134, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2024-06-04 16:15:17,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-04 16:15:17,838 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 1134 flow [2024-06-04 16:15:17,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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 16:15:17,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:17,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:17,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:15:17,839 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 16:15:17,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1449249931, now seen corresponding path program 1 times [2024-06-04 16:15:17,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:17,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778135244] [2024-06-04 16:15:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:17,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:18,038 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 16:15:18,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:18,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778135244] [2024-06-04 16:15:18,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778135244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:18,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:18,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:18,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662052687] [2024-06-04 16:15:18,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:18,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:18,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:18,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:18,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:18,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 1134 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:18,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:18,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:18,403 INFO L124 PetriNetUnfolderBase]: 1120/1875 cut-off events. [2024-06-04 16:15:18,403 INFO L125 PetriNetUnfolderBase]: For 24104/24104 co-relation queries the response was YES. [2024-06-04 16:15:18,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10337 conditions, 1875 events. 1120/1875 cut-off events. For 24104/24104 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9862 event pairs, 296 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 10291. Up to 1565 conditions per place. [2024-06-04 16:15:18,416 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 36 changer transitions 0/167 dead transitions. [2024-06-04 16:15:18,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 167 transitions, 1738 flow [2024-06-04 16:15:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 16:15:18,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 16:15:18,417 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 1134 flow. Second operand 8 states and 202 transitions. [2024-06-04 16:15:18,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 167 transitions, 1738 flow [2024-06-04 16:15:18,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 167 transitions, 1655 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:18,446 INFO L231 Difference]: Finished difference. Result has 105 places, 134 transitions, 1262 flow [2024-06-04 16:15:18,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1262, PETRI_PLACES=105, PETRI_TRANSITIONS=134} [2024-06-04 16:15:18,446 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-04 16:15:18,446 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 134 transitions, 1262 flow [2024-06-04 16:15:18,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:18,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:18,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:15:18,447 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 16:15:18,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1592418957, now seen corresponding path program 2 times [2024-06-04 16:15:18,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:18,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590914570] [2024-06-04 16:15:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:18,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:18,628 INFO 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 16:15:18,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:18,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590914570] [2024-06-04 16:15:18,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590914570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:18,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:18,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:18,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131181097] [2024-06-04 16:15:18,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:18,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:18,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:18,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:18,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:18,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:18,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 134 transitions, 1262 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:18,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:18,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:18,996 INFO L124 PetriNetUnfolderBase]: 1209/2021 cut-off events. [2024-06-04 16:15:18,997 INFO L125 PetriNetUnfolderBase]: For 29325/29325 co-relation queries the response was YES. [2024-06-04 16:15:19,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11687 conditions, 2021 events. 1209/2021 cut-off events. For 29325/29325 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10795 event pairs, 290 based on Foata normal form. 4/2023 useless extension candidates. Maximal degree in co-relation 11640. Up to 1311 conditions per place. [2024-06-04 16:15:19,015 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 104 selfloop transitions, 78 changer transitions 0/189 dead transitions. [2024-06-04 16:15:19,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 2224 flow [2024-06-04 16:15:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-04 16:15:19,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-04 16:15:19,017 INFO L175 Difference]: Start difference. First operand has 105 places, 134 transitions, 1262 flow. Second operand 8 states and 212 transitions. [2024-06-04 16:15:19,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 2224 flow [2024-06-04 16:15:19,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 2081 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:19,054 INFO L231 Difference]: Finished difference. Result has 110 places, 151 transitions, 1503 flow [2024-06-04 16:15:19,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1503, PETRI_PLACES=110, PETRI_TRANSITIONS=151} [2024-06-04 16:15:19,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-04 16:15:19,055 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 151 transitions, 1503 flow [2024-06-04 16:15:19,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:19,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:19,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:15:19,055 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 16:15:19,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1454963851, now seen corresponding path program 3 times [2024-06-04 16:15:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:19,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931141163] [2024-06-04 16:15:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:19,271 INFO 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 16:15:19,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:19,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931141163] [2024-06-04 16:15:19,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931141163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:19,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:19,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:19,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884674197] [2024-06-04 16:15:19,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:19,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:19,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:19,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:19,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 151 transitions, 1503 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:19,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:19,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:19,607 INFO L124 PetriNetUnfolderBase]: 1210/2026 cut-off events. [2024-06-04 16:15:19,607 INFO L125 PetriNetUnfolderBase]: For 33131/33131 co-relation queries the response was YES. [2024-06-04 16:15:19,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12339 conditions, 2026 events. 1210/2026 cut-off events. For 33131/33131 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10877 event pairs, 290 based on Foata normal form. 4/2028 useless extension candidates. Maximal degree in co-relation 12290. Up to 1313 conditions per place. [2024-06-04 16:15:19,626 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 97 selfloop transitions, 87 changer transitions 0/191 dead transitions. [2024-06-04 16:15:19,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 191 transitions, 2275 flow [2024-06-04 16:15:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-04 16:15:19,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-04 16:15:19,628 INFO L175 Difference]: Start difference. First operand has 110 places, 151 transitions, 1503 flow. Second operand 8 states and 210 transitions. [2024-06-04 16:15:19,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 191 transitions, 2275 flow [2024-06-04 16:15:19,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 191 transitions, 2120 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:19,670 INFO L231 Difference]: Finished difference. Result has 116 places, 156 transitions, 1614 flow [2024-06-04 16:15:19,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1614, PETRI_PLACES=116, PETRI_TRANSITIONS=156} [2024-06-04 16:15:19,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-04 16:15:19,671 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 156 transitions, 1614 flow [2024-06-04 16:15:19,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:19,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:19,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:15:19,672 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 16:15:19,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1592634283, now seen corresponding path program 1 times [2024-06-04 16:15:19,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:19,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276189230] [2024-06-04 16:15:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:19,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:19,896 INFO 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 16:15:19,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:19,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276189230] [2024-06-04 16:15:19,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276189230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:19,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:19,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369056262] [2024-06-04 16:15:19,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:19,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:19,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:19,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:19,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:19,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:19,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 156 transitions, 1614 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:19,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:19,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:20,271 INFO L124 PetriNetUnfolderBase]: 1276/2137 cut-off events. [2024-06-04 16:15:20,271 INFO L125 PetriNetUnfolderBase]: For 37887/37887 co-relation queries the response was YES. [2024-06-04 16:15:20,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12916 conditions, 2137 events. 1276/2137 cut-off events. For 37887/37887 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11600 event pairs, 297 based on Foata normal form. 14/2149 useless extension candidates. Maximal degree in co-relation 12865. Up to 1608 conditions per place. [2024-06-04 16:15:20,291 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 131 selfloop transitions, 56 changer transitions 0/194 dead transitions. [2024-06-04 16:15:20,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 194 transitions, 2284 flow [2024-06-04 16:15:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 16:15:20,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-04 16:15:20,294 INFO L175 Difference]: Start difference. First operand has 116 places, 156 transitions, 1614 flow. Second operand 8 states and 207 transitions. [2024-06-04 16:15:20,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 194 transitions, 2284 flow [2024-06-04 16:15:20,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 194 transitions, 2107 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:20,328 INFO L231 Difference]: Finished difference. Result has 119 places, 159 transitions, 1612 flow [2024-06-04 16:15:20,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1612, PETRI_PLACES=119, PETRI_TRANSITIONS=159} [2024-06-04 16:15:20,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-04 16:15:20,329 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 159 transitions, 1612 flow [2024-06-04 16:15:20,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:20,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:20,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:20,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:15:20,329 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:20,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash -425291775, now seen corresponding path program 1 times [2024-06-04 16:15:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:20,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249995863] [2024-06-04 16:15:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:20,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:20,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:20,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249995863] [2024-06-04 16:15:20,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249995863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:20,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:20,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:20,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240369748] [2024-06-04 16:15:20,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:20,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:20,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:20,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:20,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:20,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:15:20,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 159 transitions, 1612 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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 16:15:20,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:20,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:15:20,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:20,783 INFO L124 PetriNetUnfolderBase]: 1207/2075 cut-off events. [2024-06-04 16:15:20,783 INFO L125 PetriNetUnfolderBase]: For 36762/36786 co-relation queries the response was YES. [2024-06-04 16:15:20,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12605 conditions, 2075 events. 1207/2075 cut-off events. For 36762/36786 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11478 event pairs, 303 based on Foata normal form. 2/2070 useless extension candidates. Maximal degree in co-relation 12553. Up to 1653 conditions per place. [2024-06-04 16:15:20,852 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 131 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-04 16:15:20,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 181 transitions, 2088 flow [2024-06-04 16:15:20,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:15:20,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:15:20,853 INFO L175 Difference]: Start difference. First operand has 119 places, 159 transitions, 1612 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:15:20,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 181 transitions, 2088 flow [2024-06-04 16:15:20,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 181 transitions, 1941 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:20,888 INFO L231 Difference]: Finished difference. Result has 119 places, 164 transitions, 1606 flow [2024-06-04 16:15:20,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1606, PETRI_PLACES=119, PETRI_TRANSITIONS=164} [2024-06-04 16:15:20,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-04 16:15:20,889 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 164 transitions, 1606 flow [2024-06-04 16:15:20,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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 16:15:20,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:20,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:20,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:15:20,891 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:20,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1369055551, now seen corresponding path program 4 times [2024-06-04 16:15:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:20,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696628821] [2024-06-04 16:15:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:20,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:21,077 INFO 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 16:15:21,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:21,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696628821] [2024-06-04 16:15:21,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696628821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:21,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:21,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:21,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028581197] [2024-06-04 16:15:21,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:21,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:21,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:21,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:21,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:21,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 164 transitions, 1606 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:21,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:21,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:21,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:21,435 INFO L124 PetriNetUnfolderBase]: 1335/2246 cut-off events. [2024-06-04 16:15:21,436 INFO L125 PetriNetUnfolderBase]: For 41316/41316 co-relation queries the response was YES. [2024-06-04 16:15:21,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13480 conditions, 2246 events. 1335/2246 cut-off events. For 41316/41316 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12331 event pairs, 286 based on Foata normal form. 4/2249 useless extension candidates. Maximal degree in co-relation 13427. Up to 1470 conditions per place. [2024-06-04 16:15:21,456 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 112 selfloop transitions, 102 changer transitions 0/221 dead transitions. [2024-06-04 16:15:21,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 221 transitions, 2548 flow [2024-06-04 16:15:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-04 16:15:21,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-04 16:15:21,458 INFO L175 Difference]: Start difference. First operand has 119 places, 164 transitions, 1606 flow. Second operand 10 states and 255 transitions. [2024-06-04 16:15:21,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 221 transitions, 2548 flow [2024-06-04 16:15:21,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 221 transitions, 2494 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:21,502 INFO L231 Difference]: Finished difference. Result has 127 places, 177 transitions, 2017 flow [2024-06-04 16:15:21,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2017, PETRI_PLACES=127, PETRI_TRANSITIONS=177} [2024-06-04 16:15:21,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-04 16:15:21,503 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 177 transitions, 2017 flow [2024-06-04 16:15:21,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:21,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:21,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:21,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:15:21,503 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:21,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1787784151, now seen corresponding path program 5 times [2024-06-04 16:15:21,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:21,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947105590] [2024-06-04 16:15:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:21,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:21,688 INFO 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 16:15:21,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947105590] [2024-06-04 16:15:21,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947105590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:21,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:21,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:21,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711672217] [2024-06-04 16:15:21,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:21,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:21,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:21,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:21,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 177 transitions, 2017 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:21,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:21,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:21,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:22,044 INFO L124 PetriNetUnfolderBase]: 1360/2292 cut-off events. [2024-06-04 16:15:22,045 INFO L125 PetriNetUnfolderBase]: For 47406/47406 co-relation queries the response was YES. [2024-06-04 16:15:22,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14652 conditions, 2292 events. 1360/2292 cut-off events. For 47406/47406 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12670 event pairs, 288 based on Foata normal form. 4/2295 useless extension candidates. Maximal degree in co-relation 14597. Up to 1495 conditions per place. [2024-06-04 16:15:22,068 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 121 selfloop transitions, 96 changer transitions 0/224 dead transitions. [2024-06-04 16:15:22,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 224 transitions, 2929 flow [2024-06-04 16:15:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-04 16:15:22,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-06-04 16:15:22,069 INFO L175 Difference]: Start difference. First operand has 127 places, 177 transitions, 2017 flow. Second operand 9 states and 235 transitions. [2024-06-04 16:15:22,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 224 transitions, 2929 flow [2024-06-04 16:15:22,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 224 transitions, 2782 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:22,127 INFO L231 Difference]: Finished difference. Result has 132 places, 184 transitions, 2223 flow [2024-06-04 16:15:22,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2223, PETRI_PLACES=132, PETRI_TRANSITIONS=184} [2024-06-04 16:15:22,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-04 16:15:22,128 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 184 transitions, 2223 flow [2024-06-04 16:15:22,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:22,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:22,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:15:22,129 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:22,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1814750611, now seen corresponding path program 6 times [2024-06-04 16:15:22,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:22,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775519192] [2024-06-04 16:15:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:22,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:22,326 INFO 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 16:15:22,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:22,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775519192] [2024-06-04 16:15:22,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775519192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:22,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:22,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:22,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222829919] [2024-06-04 16:15:22,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:22,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:22,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:22,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:22,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 184 transitions, 2223 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:22,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:22,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:22,745 INFO L124 PetriNetUnfolderBase]: 1353/2283 cut-off events. [2024-06-04 16:15:22,746 INFO L125 PetriNetUnfolderBase]: For 49017/49017 co-relation queries the response was YES. [2024-06-04 16:15:22,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14952 conditions, 2283 events. 1353/2283 cut-off events. For 49017/49017 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12569 event pairs, 288 based on Foata normal form. 4/2286 useless extension candidates. Maximal degree in co-relation 14894. Up to 1491 conditions per place. [2024-06-04 16:15:22,777 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 121 selfloop transitions, 95 changer transitions 0/223 dead transitions. [2024-06-04 16:15:22,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 223 transitions, 2981 flow [2024-06-04 16:15:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-04 16:15:22,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6164021164021164 [2024-06-04 16:15:22,778 INFO L175 Difference]: Start difference. First operand has 132 places, 184 transitions, 2223 flow. Second operand 9 states and 233 transitions. [2024-06-04 16:15:22,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 223 transitions, 2981 flow [2024-06-04 16:15:22,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 223 transitions, 2733 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:22,836 INFO L231 Difference]: Finished difference. Result has 136 places, 184 transitions, 2176 flow [2024-06-04 16:15:22,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2176, PETRI_PLACES=136, PETRI_TRANSITIONS=184} [2024-06-04 16:15:22,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-04 16:15:22,837 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 184 transitions, 2176 flow [2024-06-04 16:15:22,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:22,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:22,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:15:22,838 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:22,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:22,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1369063487, now seen corresponding path program 2 times [2024-06-04 16:15:22,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:22,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192619453] [2024-06-04 16:15:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:22,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:23,027 INFO 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 16:15:23,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:23,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192619453] [2024-06-04 16:15:23,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192619453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:23,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:23,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:23,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418768011] [2024-06-04 16:15:23,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:23,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:23,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:23,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:23,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:23,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:23,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 184 transitions, 2176 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:23,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:23,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:23,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:23,440 INFO L124 PetriNetUnfolderBase]: 1419/2402 cut-off events. [2024-06-04 16:15:23,440 INFO L125 PetriNetUnfolderBase]: For 55563/55563 co-relation queries the response was YES. [2024-06-04 16:15:23,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15489 conditions, 2402 events. 1419/2402 cut-off events. For 55563/55563 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13460 event pairs, 300 based on Foata normal form. 14/2415 useless extension candidates. Maximal degree in co-relation 15430. Up to 1819 conditions per place. [2024-06-04 16:15:23,464 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 61 changer transitions 0/233 dead transitions. [2024-06-04 16:15:23,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 233 transitions, 3000 flow [2024-06-04 16:15:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-04 16:15:23,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023809523809524 [2024-06-04 16:15:23,465 INFO L175 Difference]: Start difference. First operand has 136 places, 184 transitions, 2176 flow. Second operand 10 states and 253 transitions. [2024-06-04 16:15:23,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 233 transitions, 3000 flow [2024-06-04 16:15:23,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 233 transitions, 2803 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:23,522 INFO L231 Difference]: Finished difference. Result has 139 places, 187 transitions, 2172 flow [2024-06-04 16:15:23,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2172, PETRI_PLACES=139, PETRI_TRANSITIONS=187} [2024-06-04 16:15:23,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-04 16:15:23,523 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 187 transitions, 2172 flow [2024-06-04 16:15:23,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:23,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:23,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:23,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:15:23,524 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:23,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:23,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1548511575, now seen corresponding path program 3 times [2024-06-04 16:15:23,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:23,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084821562] [2024-06-04 16:15:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:23,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:23,730 INFO 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 16:15:23,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:23,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084821562] [2024-06-04 16:15:23,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084821562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:23,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:23,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:23,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13954849] [2024-06-04 16:15:23,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:23,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:23,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:23,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:23,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 187 transitions, 2172 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:23,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:23,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:23,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:24,151 INFO L124 PetriNetUnfolderBase]: 1590/2709 cut-off events. [2024-06-04 16:15:24,151 INFO L125 PetriNetUnfolderBase]: For 65397/65397 co-relation queries the response was YES. [2024-06-04 16:15:24,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17291 conditions, 2709 events. 1590/2709 cut-off events. For 65397/65397 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15749 event pairs, 289 based on Foata normal form. 14/2722 useless extension candidates. Maximal degree in co-relation 17231. Up to 1718 conditions per place. [2024-06-04 16:15:24,174 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 171 selfloop transitions, 68 changer transitions 0/246 dead transitions. [2024-06-04 16:15:24,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 246 transitions, 3228 flow [2024-06-04 16:15:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-04 16:15:24,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-04 16:15:24,176 INFO L175 Difference]: Start difference. First operand has 139 places, 187 transitions, 2172 flow. Second operand 10 states and 258 transitions. [2024-06-04 16:15:24,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 246 transitions, 3228 flow [2024-06-04 16:15:24,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 246 transitions, 3069 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:24,250 INFO L231 Difference]: Finished difference. Result has 142 places, 193 transitions, 2307 flow [2024-06-04 16:15:24,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2307, PETRI_PLACES=142, PETRI_TRANSITIONS=193} [2024-06-04 16:15:24,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-04 16:15:24,251 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 193 transitions, 2307 flow [2024-06-04 16:15:24,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:24,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:24,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:15:24,252 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:24,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1112562977, now seen corresponding path program 4 times [2024-06-04 16:15:24,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:24,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755046698] [2024-06-04 16:15:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:24,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:24,432 INFO 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 16:15:24,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:24,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755046698] [2024-06-04 16:15:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755046698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:24,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:24,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:24,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834752430] [2024-06-04 16:15:24,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:24,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:24,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:24,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:24,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:24,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:24,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 193 transitions, 2307 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:24,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:24,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:24,877 INFO L124 PetriNetUnfolderBase]: 1618/2756 cut-off events. [2024-06-04 16:15:24,878 INFO L125 PetriNetUnfolderBase]: For 69409/69409 co-relation queries the response was YES. [2024-06-04 16:15:24,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17940 conditions, 2756 events. 1618/2756 cut-off events. For 69409/69409 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16078 event pairs, 350 based on Foata normal form. 14/2769 useless extension candidates. Maximal degree in co-relation 17878. Up to 2132 conditions per place. [2024-06-04 16:15:24,902 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 174 selfloop transitions, 56 changer transitions 0/237 dead transitions. [2024-06-04 16:15:24,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 237 transitions, 3118 flow [2024-06-04 16:15:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-04 16:15:24,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-04 16:15:24,903 INFO L175 Difference]: Start difference. First operand has 142 places, 193 transitions, 2307 flow. Second operand 9 states and 231 transitions. [2024-06-04 16:15:24,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 237 transitions, 3118 flow [2024-06-04 16:15:24,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 237 transitions, 2977 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:24,998 INFO L231 Difference]: Finished difference. Result has 145 places, 195 transitions, 2320 flow [2024-06-04 16:15:24,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2320, PETRI_PLACES=145, PETRI_TRANSITIONS=195} [2024-06-04 16:15:24,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-04 16:15:24,999 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 195 transitions, 2320 flow [2024-06-04 16:15:24,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:24,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:24,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:15:25,000 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 16:15:25,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:25,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1793935685, now seen corresponding path program 2 times [2024-06-04 16:15:25,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:25,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089618121] [2024-06-04 16:15:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:25,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:25,204 INFO 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 16:15:25,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:25,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089618121] [2024-06-04 16:15:25,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089618121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:25,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:25,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:25,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149969811] [2024-06-04 16:15:25,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:25,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:25,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:25,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:25,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:15:25,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 195 transitions, 2320 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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 16:15:25,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:25,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:15:25,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:25,619 INFO L124 PetriNetUnfolderBase]: 1473/2597 cut-off events. [2024-06-04 16:15:25,619 INFO L125 PetriNetUnfolderBase]: For 64210/64220 co-relation queries the response was YES. [2024-06-04 16:15:25,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16807 conditions, 2597 events. 1473/2597 cut-off events. For 64210/64220 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15608 event pairs, 378 based on Foata normal form. 2/2595 useless extension candidates. Maximal degree in co-relation 16743. Up to 2017 conditions per place. [2024-06-04 16:15:25,644 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 159 selfloop transitions, 28 changer transitions 0/212 dead transitions. [2024-06-04 16:15:25,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 212 transitions, 2736 flow [2024-06-04 16:15:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:15:25,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-04 16:15:25,645 INFO L175 Difference]: Start difference. First operand has 145 places, 195 transitions, 2320 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:15:25,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 212 transitions, 2736 flow [2024-06-04 16:15:25,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 212 transitions, 2593 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:25,760 INFO L231 Difference]: Finished difference. Result has 146 places, 195 transitions, 2244 flow [2024-06-04 16:15:25,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2244, PETRI_PLACES=146, PETRI_TRANSITIONS=195} [2024-06-04 16:15:25,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-04 16:15:25,765 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 195 transitions, 2244 flow [2024-06-04 16:15:25,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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 16:15:25,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:25,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:25,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:15:25,765 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 16:15:25,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1679122985, now seen corresponding path program 1 times [2024-06-04 16:15:25,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:25,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435358567] [2024-06-04 16:15:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:25,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:25,964 INFO 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 16:15:25,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:25,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435358567] [2024-06-04 16:15:25,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435358567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:25,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:25,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:25,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3394805] [2024-06-04 16:15:25,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:25,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:25,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:25,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:25,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:25,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 195 transitions, 2244 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 16:15:25,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:25,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:25,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:26,319 INFO L124 PetriNetUnfolderBase]: 1604/2721 cut-off events. [2024-06-04 16:15:26,319 INFO L125 PetriNetUnfolderBase]: For 67960/67960 co-relation queries the response was YES. [2024-06-04 16:15:26,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17592 conditions, 2721 events. 1604/2721 cut-off events. For 67960/67960 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15745 event pairs, 377 based on Foata normal form. 2/2722 useless extension candidates. Maximal degree in co-relation 17527. Up to 2382 conditions per place. [2024-06-04 16:15:26,345 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 186 selfloop transitions, 18 changer transitions 0/211 dead transitions. [2024-06-04 16:15:26,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 211 transitions, 2781 flow [2024-06-04 16:15:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-04 16:15:26,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-04 16:15:26,346 INFO L175 Difference]: Start difference. First operand has 146 places, 195 transitions, 2244 flow. Second operand 5 states and 122 transitions. [2024-06-04 16:15:26,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 211 transitions, 2781 flow [2024-06-04 16:15:26,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 211 transitions, 2703 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:26,436 INFO L231 Difference]: Finished difference. Result has 144 places, 198 transitions, 2253 flow [2024-06-04 16:15:26,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2253, PETRI_PLACES=144, PETRI_TRANSITIONS=198} [2024-06-04 16:15:26,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-04 16:15:26,437 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 198 transitions, 2253 flow [2024-06-04 16:15:26,437 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 16:15:26,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:26,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:26,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:15:26,438 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 16:15:26,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:26,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1793928741, now seen corresponding path program 2 times [2024-06-04 16:15:26,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:26,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215880181] [2024-06-04 16:15:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:26,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:26,606 INFO 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 16:15:26,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:26,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215880181] [2024-06-04 16:15:26,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215880181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:26,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:26,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:26,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572612509] [2024-06-04 16:15:26,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:26,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:26,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:26,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:26,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 198 transitions, 2253 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 16:15:26,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:26,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:26,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:26,945 INFO L124 PetriNetUnfolderBase]: 1586/2687 cut-off events. [2024-06-04 16:15:26,945 INFO L125 PetriNetUnfolderBase]: For 70753/70753 co-relation queries the response was YES. [2024-06-04 16:15:26,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17489 conditions, 2687 events. 1586/2687 cut-off events. For 70753/70753 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15485 event pairs, 385 based on Foata normal form. 1/2686 useless extension candidates. Maximal degree in co-relation 17423. Up to 2356 conditions per place. [2024-06-04 16:15:26,965 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 181 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2024-06-04 16:15:26,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 207 transitions, 2675 flow [2024-06-04 16:15:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-04 16:15:26,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-04 16:15:26,967 INFO L175 Difference]: Start difference. First operand has 144 places, 198 transitions, 2253 flow. Second operand 5 states and 119 transitions. [2024-06-04 16:15:26,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 207 transitions, 2675 flow [2024-06-04 16:15:27,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 207 transitions, 2648 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:27,053 INFO L231 Difference]: Finished difference. Result has 147 places, 198 transitions, 2270 flow [2024-06-04 16:15:27,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2270, PETRI_PLACES=147, PETRI_TRANSITIONS=198} [2024-06-04 16:15:27,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-04 16:15:27,054 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 198 transitions, 2270 flow [2024-06-04 16:15:27,054 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 16:15:27,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:27,054 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 16:15:27,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:15:27,054 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:27,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1863986431, now seen corresponding path program 1 times [2024-06-04 16:15:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128058431] [2024-06-04 16:15:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:27,258 INFO 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 16:15:27,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128058431] [2024-06-04 16:15:27,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128058431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:27,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:27,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:27,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911053787] [2024-06-04 16:15:27,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:27,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:27,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:27,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:27,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:27,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:27,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 198 transitions, 2270 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:27,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:27,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:27,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:27,749 INFO L124 PetriNetUnfolderBase]: 1628/2754 cut-off events. [2024-06-04 16:15:27,749 INFO L125 PetriNetUnfolderBase]: For 78837/78837 co-relation queries the response was YES. [2024-06-04 16:15:27,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18261 conditions, 2754 events. 1628/2754 cut-off events. For 78837/78837 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15865 event pairs, 262 based on Foata normal form. 4/2757 useless extension candidates. Maximal degree in co-relation 18194. Up to 2341 conditions per place. [2024-06-04 16:15:27,770 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 19 changer transitions 0/239 dead transitions. [2024-06-04 16:15:27,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 239 transitions, 3050 flow [2024-06-04 16:15:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:15:27,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-04 16:15:27,772 INFO L175 Difference]: Start difference. First operand has 147 places, 198 transitions, 2270 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:15:27,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 239 transitions, 3050 flow [2024-06-04 16:15:27,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 239 transitions, 2987 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:27,858 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 2372 flow [2024-06-04 16:15:27,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2372, PETRI_PLACES=150, PETRI_TRANSITIONS=202} [2024-06-04 16:15:27,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-04 16:15:27,858 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 2372 flow [2024-06-04 16:15:27,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:27,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:27,859 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 16:15:27,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:15:27,859 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:27,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash -17340307, now seen corresponding path program 2 times [2024-06-04 16:15:27,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:27,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292571185] [2024-06-04 16:15:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:27,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:28,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:28,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292571185] [2024-06-04 16:15:28,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292571185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:28,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:28,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:28,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617343596] [2024-06-04 16:15:28,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:28,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:28,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:28,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:28,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:28,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:28,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 202 transitions, 2372 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:28,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:28,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:28,526 INFO L124 PetriNetUnfolderBase]: 1620/2742 cut-off events. [2024-06-04 16:15:28,527 INFO L125 PetriNetUnfolderBase]: For 82222/82222 co-relation queries the response was YES. [2024-06-04 16:15:28,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18322 conditions, 2742 events. 1620/2742 cut-off events. For 82222/82222 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15785 event pairs, 346 based on Foata normal form. 4/2745 useless extension candidates. Maximal degree in co-relation 18254. Up to 2388 conditions per place. [2024-06-04 16:15:28,552 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 210 selfloop transitions, 15 changer transitions 0/232 dead transitions. [2024-06-04 16:15:28,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 232 transitions, 2898 flow [2024-06-04 16:15:28,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:28,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:15:28,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 16:15:28,553 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 2372 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:15:28,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 232 transitions, 2898 flow [2024-06-04 16:15:28,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 232 transitions, 2776 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:28,668 INFO L231 Difference]: Finished difference. Result has 153 places, 202 transitions, 2287 flow [2024-06-04 16:15:28,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2250, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2287, PETRI_PLACES=153, PETRI_TRANSITIONS=202} [2024-06-04 16:15:28,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-04 16:15:28,669 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 202 transitions, 2287 flow [2024-06-04 16:15:28,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:28,669 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 16:15:28,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:15:28,669 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:28,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2147193601, now seen corresponding path program 3 times [2024-06-04 16:15:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:28,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012003784] [2024-06-04 16:15:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:28,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:28,860 INFO 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 16:15:28,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:28,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012003784] [2024-06-04 16:15:28,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012003784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:28,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:28,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:28,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238231157] [2024-06-04 16:15:28,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:28,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:28,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:28,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:28,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:28,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 202 transitions, 2287 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:28,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:28,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:29,258 INFO L124 PetriNetUnfolderBase]: 1637/2770 cut-off events. [2024-06-04 16:15:29,259 INFO L125 PetriNetUnfolderBase]: For 87249/87251 co-relation queries the response was YES. [2024-06-04 16:15:29,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18453 conditions, 2770 events. 1637/2770 cut-off events. For 87249/87251 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16012 event pairs, 350 based on Foata normal form. 6/2775 useless extension candidates. Maximal degree in co-relation 18383. Up to 2370 conditions per place. [2024-06-04 16:15:29,282 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 27 changer transitions 0/231 dead transitions. [2024-06-04 16:15:29,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 231 transitions, 2865 flow [2024-06-04 16:15:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:15:29,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 16:15:29,284 INFO L175 Difference]: Start difference. First operand has 153 places, 202 transitions, 2287 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:15:29,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 231 transitions, 2865 flow [2024-06-04 16:15:29,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 231 transitions, 2830 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:29,373 INFO L231 Difference]: Finished difference. Result has 154 places, 204 transitions, 2379 flow [2024-06-04 16:15:29,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2379, PETRI_PLACES=154, PETRI_TRANSITIONS=204} [2024-06-04 16:15:29,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-04 16:15:29,374 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 204 transitions, 2379 flow [2024-06-04 16:15:29,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:29,375 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 16:15:29,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:15:29,375 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:29,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:29,375 INFO L85 PathProgramCache]: Analyzing trace with hash -500131359, now seen corresponding path program 4 times [2024-06-04 16:15:29,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:29,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083785065] [2024-06-04 16:15:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:29,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:29,564 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 16:15:29,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:29,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083785065] [2024-06-04 16:15:29,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083785065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:29,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:29,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:29,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704888581] [2024-06-04 16:15:29,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:29,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:29,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:29,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:29,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 204 transitions, 2379 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:29,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:29,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:29,994 INFO L124 PetriNetUnfolderBase]: 1629/2757 cut-off events. [2024-06-04 16:15:29,995 INFO L125 PetriNetUnfolderBase]: For 90657/90657 co-relation queries the response was YES. [2024-06-04 16:15:30,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 2757 events. 1629/2757 cut-off events. For 90657/90657 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15890 event pairs, 344 based on Foata normal form. 4/2760 useless extension candidates. Maximal degree in co-relation 18430. Up to 2358 conditions per place. [2024-06-04 16:15:30,018 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 206 selfloop transitions, 28 changer transitions 0/241 dead transitions. [2024-06-04 16:15:30,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 241 transitions, 3001 flow [2024-06-04 16:15:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:15:30,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-04 16:15:30,020 INFO L175 Difference]: Start difference. First operand has 154 places, 204 transitions, 2379 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:15:30,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 241 transitions, 3001 flow [2024-06-04 16:15:30,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 241 transitions, 2892 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:30,120 INFO L231 Difference]: Finished difference. Result has 158 places, 206 transitions, 2403 flow [2024-06-04 16:15:30,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=158, PETRI_TRANSITIONS=206} [2024-06-04 16:15:30,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-04 16:15:30,122 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 206 transitions, 2403 flow [2024-06-04 16:15:30,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:30,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:30,122 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 16:15:30,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:15:30,122 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 16:15:30,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:30,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1101440646, now seen corresponding path program 1 times [2024-06-04 16:15:30,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:30,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918473225] [2024-06-04 16:15:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:30,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:30,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918473225] [2024-06-04 16:15:30,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918473225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:30,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:30,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:30,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618655209] [2024-06-04 16:15:30,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:30,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:30,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:30,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:30,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:30,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 206 transitions, 2403 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 16:15:30,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:30,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:30,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:30,708 INFO L124 PetriNetUnfolderBase]: 1661/2809 cut-off events. [2024-06-04 16:15:30,708 INFO L125 PetriNetUnfolderBase]: For 95926/95926 co-relation queries the response was YES. [2024-06-04 16:15:30,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18976 conditions, 2809 events. 1661/2809 cut-off events. For 95926/95926 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16217 event pairs, 327 based on Foata normal form. 4/2812 useless extension candidates. Maximal degree in co-relation 18904. Up to 2251 conditions per place. [2024-06-04 16:15:30,732 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 66 changer transitions 0/244 dead transitions. [2024-06-04 16:15:30,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 244 transitions, 3244 flow [2024-06-04 16:15:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:15:30,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-04 16:15:30,734 INFO L175 Difference]: Start difference. First operand has 158 places, 206 transitions, 2403 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:15:30,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 244 transitions, 3244 flow [2024-06-04 16:15:30,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 244 transitions, 3129 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:30,842 INFO L231 Difference]: Finished difference. Result has 161 places, 217 transitions, 2623 flow [2024-06-04 16:15:30,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2623, PETRI_PLACES=161, PETRI_TRANSITIONS=217} [2024-06-04 16:15:30,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-04 16:15:30,843 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 217 transitions, 2623 flow [2024-06-04 16:15:30,843 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 16:15:30,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:30,843 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 16:15:30,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:15:30,843 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 16:15:30,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:30,844 INFO L85 PathProgramCache]: Analyzing trace with hash 223022146, now seen corresponding path program 2 times [2024-06-04 16:15:30,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:30,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803157333] [2024-06-04 16:15:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:30,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:31,031 INFO 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 16:15:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:31,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803157333] [2024-06-04 16:15:31,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803157333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:31,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:31,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:31,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925860702] [2024-06-04 16:15:31,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:31,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:31,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:31,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:31,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 217 transitions, 2623 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 16:15:31,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:31,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:31,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:31,463 INFO L124 PetriNetUnfolderBase]: 1671/2826 cut-off events. [2024-06-04 16:15:31,463 INFO L125 PetriNetUnfolderBase]: For 98786/98786 co-relation queries the response was YES. [2024-06-04 16:15:31,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19366 conditions, 2826 events. 1671/2826 cut-off events. For 98786/98786 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16348 event pairs, 336 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 19292. Up to 2257 conditions per place. [2024-06-04 16:15:31,491 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 158 selfloop transitions, 77 changer transitions 0/242 dead transitions. [2024-06-04 16:15:31,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 242 transitions, 3425 flow [2024-06-04 16:15:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:15:31,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-04 16:15:31,492 INFO L175 Difference]: Start difference. First operand has 161 places, 217 transitions, 2623 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:15:31,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 242 transitions, 3425 flow [2024-06-04 16:15:31,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 242 transitions, 3328 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:31,605 INFO L231 Difference]: Finished difference. Result has 164 places, 221 transitions, 2759 flow [2024-06-04 16:15:31,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2759, PETRI_PLACES=164, PETRI_TRANSITIONS=221} [2024-06-04 16:15:31,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-04 16:15:31,606 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 221 transitions, 2759 flow [2024-06-04 16:15:31,606 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 16:15:31,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:31,606 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 16:15:31,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:15:31,606 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 16:15:31,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash 517847732, now seen corresponding path program 3 times [2024-06-04 16:15:31,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:31,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683907709] [2024-06-04 16:15:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:31,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:31,818 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 16:15:31,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:31,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683907709] [2024-06-04 16:15:31,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683907709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:31,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:31,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:31,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713844067] [2024-06-04 16:15:31,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:31,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:31,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:31,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:31,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 221 transitions, 2759 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 16:15:31,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:31,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:31,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:32,254 INFO L124 PetriNetUnfolderBase]: 1667/2822 cut-off events. [2024-06-04 16:15:32,254 INFO L125 PetriNetUnfolderBase]: For 102828/102828 co-relation queries the response was YES. [2024-06-04 16:15:32,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19448 conditions, 2822 events. 1667/2822 cut-off events. For 102828/102828 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16330 event pairs, 336 based on Foata normal form. 2/2822 useless extension candidates. Maximal degree in co-relation 19373. Up to 2256 conditions per place. [2024-06-04 16:15:32,281 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 73 changer transitions 0/243 dead transitions. [2024-06-04 16:15:32,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 243 transitions, 3499 flow [2024-06-04 16:15:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 16:15:32,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-04 16:15:32,283 INFO L175 Difference]: Start difference. First operand has 164 places, 221 transitions, 2759 flow. Second operand 9 states and 212 transitions. [2024-06-04 16:15:32,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 243 transitions, 3499 flow [2024-06-04 16:15:32,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 243 transitions, 3321 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:32,395 INFO L231 Difference]: Finished difference. Result has 167 places, 221 transitions, 2736 flow [2024-06-04 16:15:32,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2736, PETRI_PLACES=167, PETRI_TRANSITIONS=221} [2024-06-04 16:15:32,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-04 16:15:32,396 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 221 transitions, 2736 flow [2024-06-04 16:15:32,396 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 16:15:32,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:32,396 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 16:15:32,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:15:32,396 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 16:15:32,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:32,397 INFO L85 PathProgramCache]: Analyzing trace with hash -441904046, now seen corresponding path program 1 times [2024-06-04 16:15:32,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:32,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136200944] [2024-06-04 16:15:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:32,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:32,600 INFO 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 16:15:32,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136200944] [2024-06-04 16:15:32,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136200944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:32,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:32,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:32,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079914372] [2024-06-04 16:15:32,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:32,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:32,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:32,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:32,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:15:32,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 221 transitions, 2736 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:32,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:32,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:15:32,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:33,000 INFO L124 PetriNetUnfolderBase]: 1564/2734 cut-off events. [2024-06-04 16:15:33,001 INFO L125 PetriNetUnfolderBase]: For 110548/110572 co-relation queries the response was YES. [2024-06-04 16:15:33,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18508 conditions, 2734 events. 1564/2734 cut-off events. For 110548/110572 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16340 event pairs, 337 based on Foata normal form. 12/2736 useless extension candidates. Maximal degree in co-relation 18434. Up to 2107 conditions per place. [2024-06-04 16:15:33,023 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 184 selfloop transitions, 32 changer transitions 0/245 dead transitions. [2024-06-04 16:15:33,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 245 transitions, 3262 flow [2024-06-04 16:15:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:15:33,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:15:33,024 INFO L175 Difference]: Start difference. First operand has 167 places, 221 transitions, 2736 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:15:33,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 245 transitions, 3262 flow [2024-06-04 16:15:33,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 245 transitions, 3061 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:33,128 INFO L231 Difference]: Finished difference. Result has 167 places, 223 transitions, 2636 flow [2024-06-04 16:15:33,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2535, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2636, PETRI_PLACES=167, PETRI_TRANSITIONS=223} [2024-06-04 16:15:33,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-04 16:15:33,129 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 223 transitions, 2636 flow [2024-06-04 16:15:33,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:33,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:33,129 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 16:15:33,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:15:33,129 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:33,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:33,130 INFO L85 PathProgramCache]: Analyzing trace with hash -541209634, now seen corresponding path program 1 times [2024-06-04 16:15:33,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:33,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678327247] [2024-06-04 16:15:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:33,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:33,314 INFO 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 16:15:33,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:33,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678327247] [2024-06-04 16:15:33,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678327247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:33,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:33,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147265878] [2024-06-04 16:15:33,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:33,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:33,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:33,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:33,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 223 transitions, 2636 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:33,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:33,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:33,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:33,976 INFO L124 PetriNetUnfolderBase]: 2312/3887 cut-off events. [2024-06-04 16:15:33,976 INFO L125 PetriNetUnfolderBase]: For 199748/199748 co-relation queries the response was YES. [2024-06-04 16:15:33,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27656 conditions, 3887 events. 2312/3887 cut-off events. For 199748/199748 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23749 event pairs, 404 based on Foata normal form. 42/3926 useless extension candidates. Maximal degree in co-relation 27582. Up to 2361 conditions per place. [2024-06-04 16:15:34,011 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 238 selfloop transitions, 46 changer transitions 0/291 dead transitions. [2024-06-04 16:15:34,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 291 transitions, 3902 flow [2024-06-04 16:15:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-04 16:15:34,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-04 16:15:34,012 INFO L175 Difference]: Start difference. First operand has 167 places, 223 transitions, 2636 flow. Second operand 10 states and 261 transitions. [2024-06-04 16:15:34,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 291 transitions, 3902 flow [2024-06-04 16:15:34,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 291 transitions, 3825 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:34,217 INFO L231 Difference]: Finished difference. Result has 173 places, 229 transitions, 2825 flow [2024-06-04 16:15:34,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2825, PETRI_PLACES=173, PETRI_TRANSITIONS=229} [2024-06-04 16:15:34,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-04 16:15:34,218 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 229 transitions, 2825 flow [2024-06-04 16:15:34,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:34,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:34,219 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 16:15:34,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:15:34,219 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:34,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:34,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1950879756, now seen corresponding path program 2 times [2024-06-04 16:15:34,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:34,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231825820] [2024-06-04 16:15:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:34,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:34,417 INFO 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 16:15:34,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:34,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231825820] [2024-06-04 16:15:34,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231825820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:34,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:34,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:34,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71395270] [2024-06-04 16:15:34,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:34,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:34,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:34,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:34,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:34,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 229 transitions, 2825 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:34,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:34,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:34,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:35,088 INFO L124 PetriNetUnfolderBase]: 2470/4213 cut-off events. [2024-06-04 16:15:35,088 INFO L125 PetriNetUnfolderBase]: For 215894/215894 co-relation queries the response was YES. [2024-06-04 16:15:35,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29694 conditions, 4213 events. 2470/4213 cut-off events. For 215894/215894 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26539 event pairs, 619 based on Foata normal form. 42/4252 useless extension candidates. Maximal degree in co-relation 29617. Up to 2917 conditions per place. [2024-06-04 16:15:35,124 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 43 changer transitions 0/283 dead transitions. [2024-06-04 16:15:35,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 283 transitions, 3915 flow [2024-06-04 16:15:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-04 16:15:35,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-04 16:15:35,125 INFO L175 Difference]: Start difference. First operand has 173 places, 229 transitions, 2825 flow. Second operand 9 states and 232 transitions. [2024-06-04 16:15:35,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 283 transitions, 3915 flow [2024-06-04 16:15:35,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 283 transitions, 3804 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:35,402 INFO L231 Difference]: Finished difference. Result has 178 places, 233 transitions, 2941 flow [2024-06-04 16:15:35,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2714, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2941, PETRI_PLACES=178, PETRI_TRANSITIONS=233} [2024-06-04 16:15:35,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-04 16:15:35,404 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 233 transitions, 2941 flow [2024-06-04 16:15:35,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:35,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:35,404 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 16:15:35,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:15:35,405 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:35,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:35,406 INFO L85 PathProgramCache]: Analyzing trace with hash 2037719436, now seen corresponding path program 3 times [2024-06-04 16:15:35,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:35,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601732198] [2024-06-04 16:15:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:35,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:35,593 INFO 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 16:15:35,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:35,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601732198] [2024-06-04 16:15:35,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601732198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:35,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:35,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:35,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413820042] [2024-06-04 16:15:35,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:35,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:35,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:35,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:35,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:35,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:35,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 233 transitions, 2941 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:35,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:35,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:35,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:36,263 INFO L124 PetriNetUnfolderBase]: 2454/4209 cut-off events. [2024-06-04 16:15:36,263 INFO L125 PetriNetUnfolderBase]: For 205189/205189 co-relation queries the response was YES. [2024-06-04 16:15:36,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28320 conditions, 4209 events. 2454/4209 cut-off events. For 205189/205189 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26738 event pairs, 691 based on Foata normal form. 50/4258 useless extension candidates. Maximal degree in co-relation 28240. Up to 3393 conditions per place. [2024-06-04 16:15:36,304 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 226 selfloop transitions, 43 changer transitions 0/276 dead transitions. [2024-06-04 16:15:36,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 276 transitions, 3755 flow [2024-06-04 16:15:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-04 16:15:36,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-04 16:15:36,306 INFO L175 Difference]: Start difference. First operand has 178 places, 233 transitions, 2941 flow. Second operand 9 states and 226 transitions. [2024-06-04 16:15:36,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 276 transitions, 3755 flow [2024-06-04 16:15:36,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 276 transitions, 3644 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:36,558 INFO L231 Difference]: Finished difference. Result has 182 places, 235 transitions, 3003 flow [2024-06-04 16:15:36,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3003, PETRI_PLACES=182, PETRI_TRANSITIONS=235} [2024-06-04 16:15:36,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-04 16:15:36,559 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 235 transitions, 3003 flow [2024-06-04 16:15:36,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:36,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:36,559 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 16:15:36,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:15:36,560 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:36,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1939041238, now seen corresponding path program 4 times [2024-06-04 16:15:36,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:36,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179873345] [2024-06-04 16:15:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:36,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:36,746 INFO 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 16:15:36,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:36,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179873345] [2024-06-04 16:15:36,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179873345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:36,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:36,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:36,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146578041] [2024-06-04 16:15:36,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:36,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:36,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:36,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:36,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:36,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:36,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 235 transitions, 3003 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:36,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:36,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:36,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:37,537 INFO L124 PetriNetUnfolderBase]: 2651/4555 cut-off events. [2024-06-04 16:15:37,538 INFO L125 PetriNetUnfolderBase]: For 215451/215451 co-relation queries the response was YES. [2024-06-04 16:15:37,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29981 conditions, 4555 events. 2651/4555 cut-off events. For 215451/215451 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 29556 event pairs, 748 based on Foata normal form. 50/4603 useless extension candidates. Maximal degree in co-relation 29899. Up to 3289 conditions per place. [2024-06-04 16:15:37,579 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 151 selfloop transitions, 119 changer transitions 0/277 dead transitions. [2024-06-04 16:15:37,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 277 transitions, 3979 flow [2024-06-04 16:15:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-04 16:15:37,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:15:37,580 INFO L175 Difference]: Start difference. First operand has 182 places, 235 transitions, 3003 flow. Second operand 9 states and 234 transitions. [2024-06-04 16:15:37,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 277 transitions, 3979 flow [2024-06-04 16:15:37,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 277 transitions, 3846 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:37,825 INFO L231 Difference]: Finished difference. Result has 184 places, 237 transitions, 3193 flow [2024-06-04 16:15:37,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3193, PETRI_PLACES=184, PETRI_TRANSITIONS=237} [2024-06-04 16:15:37,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-04 16:15:37,826 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 237 transitions, 3193 flow [2024-06-04 16:15:37,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:37,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:37,827 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 16:15:37,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:15:37,827 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:37,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:37,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1316778410, now seen corresponding path program 5 times [2024-06-04 16:15:37,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:37,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865832505] [2024-06-04 16:15:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:37,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:37,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865832505] [2024-06-04 16:15:37,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865832505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:37,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:37,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:37,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672936285] [2024-06-04 16:15:37,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:37,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:37,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:37,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:37,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:38,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:38,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 237 transitions, 3193 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:38,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:38,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:38,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:38,696 INFO L124 PetriNetUnfolderBase]: 2848/4905 cut-off events. [2024-06-04 16:15:38,696 INFO L125 PetriNetUnfolderBase]: For 229372/229372 co-relation queries the response was YES. [2024-06-04 16:15:38,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31996 conditions, 4905 events. 2848/4905 cut-off events. For 229372/229372 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 32282 event pairs, 834 based on Foata normal form. 50/4953 useless extension candidates. Maximal degree in co-relation 31913. Up to 3628 conditions per place. [2024-06-04 16:15:38,816 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 159 selfloop transitions, 114 changer transitions 0/280 dead transitions. [2024-06-04 16:15:38,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 280 transitions, 4271 flow [2024-06-04 16:15:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-04 16:15:38,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-06-04 16:15:38,818 INFO L175 Difference]: Start difference. First operand has 184 places, 237 transitions, 3193 flow. Second operand 9 states and 235 transitions. [2024-06-04 16:15:38,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 280 transitions, 4271 flow [2024-06-04 16:15:39,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 280 transitions, 3980 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:39,067 INFO L231 Difference]: Finished difference. Result has 186 places, 239 transitions, 3219 flow [2024-06-04 16:15:39,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3219, PETRI_PLACES=186, PETRI_TRANSITIONS=239} [2024-06-04 16:15:39,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-04 16:15:39,068 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 239 transitions, 3219 flow [2024-06-04 16:15:39,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:39,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:39,068 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 16:15:39,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:15:39,068 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:39,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 721408908, now seen corresponding path program 6 times [2024-06-04 16:15:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:39,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294596843] [2024-06-04 16:15:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:39,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:39,236 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 16:15:39,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:39,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294596843] [2024-06-04 16:15:39,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294596843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:39,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:39,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:39,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486379779] [2024-06-04 16:15:39,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:39,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:39,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:39,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:39,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:39,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 239 transitions, 3219 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:39,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:39,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:39,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:40,028 INFO L124 PetriNetUnfolderBase]: 3111/5372 cut-off events. [2024-06-04 16:15:40,028 INFO L125 PetriNetUnfolderBase]: For 245338/245338 co-relation queries the response was YES. [2024-06-04 16:15:40,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35059 conditions, 5372 events. 3111/5372 cut-off events. For 245338/245338 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36167 event pairs, 870 based on Foata normal form. 42/5412 useless extension candidates. Maximal degree in co-relation 34975. Up to 3273 conditions per place. [2024-06-04 16:15:40,084 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 168 selfloop transitions, 116 changer transitions 0/291 dead transitions. [2024-06-04 16:15:40,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 291 transitions, 4505 flow [2024-06-04 16:15:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-04 16:15:40,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-04 16:15:40,085 INFO L175 Difference]: Start difference. First operand has 186 places, 239 transitions, 3219 flow. Second operand 9 states and 240 transitions. [2024-06-04 16:15:40,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 291 transitions, 4505 flow [2024-06-04 16:15:40,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 291 transitions, 4222 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:40,411 INFO L231 Difference]: Finished difference. Result has 189 places, 243 transitions, 3330 flow [2024-06-04 16:15:40,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3330, PETRI_PLACES=189, PETRI_TRANSITIONS=243} [2024-06-04 16:15:40,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-04 16:15:40,412 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 243 transitions, 3330 flow [2024-06-04 16:15:40,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:40,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:40,412 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 16:15:40,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:15:40,413 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:40,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:40,413 INFO L85 PathProgramCache]: Analyzing trace with hash 666333982, now seen corresponding path program 1 times [2024-06-04 16:15:40,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:40,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226974387] [2024-06-04 16:15:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:40,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:40,580 INFO 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 16:15:40,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:40,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226974387] [2024-06-04 16:15:40,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226974387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:40,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:40,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:40,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473454831] [2024-06-04 16:15:40,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:40,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:40,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:40,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:40,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:40,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:40,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 243 transitions, 3330 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:40,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:40,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:40,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:41,425 INFO L124 PetriNetUnfolderBase]: 3269/5686 cut-off events. [2024-06-04 16:15:41,425 INFO L125 PetriNetUnfolderBase]: For 267903/267903 co-relation queries the response was YES. [2024-06-04 16:15:41,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36562 conditions, 5686 events. 3269/5686 cut-off events. For 267903/267903 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 39219 event pairs, 924 based on Foata normal form. 42/5723 useless extension candidates. Maximal degree in co-relation 36476. Up to 3337 conditions per place. [2024-06-04 16:15:41,479 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 157 selfloop transitions, 127 changer transitions 0/291 dead transitions. [2024-06-04 16:15:41,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 291 transitions, 4398 flow [2024-06-04 16:15:41,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-04 16:15:41,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-04 16:15:41,480 INFO L175 Difference]: Start difference. First operand has 189 places, 243 transitions, 3330 flow. Second operand 9 states and 238 transitions. [2024-06-04 16:15:41,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 291 transitions, 4398 flow [2024-06-04 16:15:41,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 291 transitions, 4162 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:41,845 INFO L231 Difference]: Finished difference. Result has 193 places, 245 transitions, 3443 flow [2024-06-04 16:15:41,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3443, PETRI_PLACES=193, PETRI_TRANSITIONS=245} [2024-06-04 16:15:41,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-04 16:15:41,845 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 245 transitions, 3443 flow [2024-06-04 16:15:41,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:41,846 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 16:15:41,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:15:41,846 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 16:15:41,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:41,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1228136626, now seen corresponding path program 1 times [2024-06-04 16:15:41,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:41,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760657224] [2024-06-04 16:15:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:41,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:42,021 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 16:15:42,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:42,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760657224] [2024-06-04 16:15:42,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760657224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:42,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:42,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544725560] [2024-06-04 16:15:42,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:42,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:42,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:42,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:42,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:42,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:42,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 245 transitions, 3443 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 16:15:42,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:42,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:42,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:42,776 INFO L124 PetriNetUnfolderBase]: 3263/5654 cut-off events. [2024-06-04 16:15:42,776 INFO L125 PetriNetUnfolderBase]: For 226628/226628 co-relation queries the response was YES. [2024-06-04 16:15:42,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36582 conditions, 5654 events. 3263/5654 cut-off events. For 226628/226628 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 38679 event pairs, 1070 based on Foata normal form. 2/5654 useless extension candidates. Maximal degree in co-relation 36494. Up to 4959 conditions per place. [2024-06-04 16:15:42,823 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 68 changer transitions 0/268 dead transitions. [2024-06-04 16:15:42,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 268 transitions, 4291 flow [2024-06-04 16:15:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:15:42,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:15:42,825 INFO L175 Difference]: Start difference. First operand has 193 places, 245 transitions, 3443 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:15:42,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 268 transitions, 4291 flow [2024-06-04 16:15:43,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 268 transitions, 3972 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:43,225 INFO L231 Difference]: Finished difference. Result has 193 places, 245 transitions, 3268 flow [2024-06-04 16:15:43,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3268, PETRI_PLACES=193, PETRI_TRANSITIONS=245} [2024-06-04 16:15:43,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-04 16:15:43,226 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 245 transitions, 3268 flow [2024-06-04 16:15:43,226 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 16:15:43,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:43,226 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 16:15:43,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:15:43,226 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 16:15:43,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1961919640, now seen corresponding path program 2 times [2024-06-04 16:15:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:43,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45458763] [2024-06-04 16:15:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:43,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:43,413 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 16:15:43,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45458763] [2024-06-04 16:15:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45458763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:43,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:43,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:43,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334452780] [2024-06-04 16:15:43,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:43,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:43,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:43,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:43,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 245 transitions, 3268 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 16:15:43,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:43,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:43,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:44,126 INFO L124 PetriNetUnfolderBase]: 3284/5697 cut-off events. [2024-06-04 16:15:44,126 INFO L125 PetriNetUnfolderBase]: For 233416/233416 co-relation queries the response was YES. [2024-06-04 16:15:44,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36279 conditions, 5697 events. 3284/5697 cut-off events. For 233416/233416 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 39098 event pairs, 1075 based on Foata normal form. 1/5696 useless extension candidates. Maximal degree in co-relation 36190. Up to 4970 conditions per place. [2024-06-04 16:15:44,181 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 78 changer transitions 0/273 dead transitions. [2024-06-04 16:15:44,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 273 transitions, 4254 flow [2024-06-04 16:15:44,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:15:44,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:15:44,182 INFO L175 Difference]: Start difference. First operand has 193 places, 245 transitions, 3268 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:15:44,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 273 transitions, 4254 flow [2024-06-04 16:15:44,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 273 transitions, 4126 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:44,633 INFO L231 Difference]: Finished difference. Result has 197 places, 253 transitions, 3453 flow [2024-06-04 16:15:44,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3453, PETRI_PLACES=197, PETRI_TRANSITIONS=253} [2024-06-04 16:15:44,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-04 16:15:44,633 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 253 transitions, 3453 flow [2024-06-04 16:15:44,634 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 16:15:44,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:44,634 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 16:15:44,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:15:44,634 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:44,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:44,635 INFO L85 PathProgramCache]: Analyzing trace with hash -735865050, now seen corresponding path program 7 times [2024-06-04 16:15:44,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:44,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992240593] [2024-06-04 16:15:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:44,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:44,837 INFO 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 16:15:44,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:44,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992240593] [2024-06-04 16:15:44,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992240593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:44,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:44,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:44,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625012306] [2024-06-04 16:15:44,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:44,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:44,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:44,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:44,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 253 transitions, 3453 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:44,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:44,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:44,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:45,796 INFO L124 PetriNetUnfolderBase]: 3471/6017 cut-off events. [2024-06-04 16:15:45,796 INFO L125 PetriNetUnfolderBase]: For 302208/302208 co-relation queries the response was YES. [2024-06-04 16:15:45,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38248 conditions, 6017 events. 3471/6017 cut-off events. For 302208/302208 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41821 event pairs, 1117 based on Foata normal form. 50/6066 useless extension candidates. Maximal degree in co-relation 38157. Up to 4678 conditions per place. [2024-06-04 16:15:45,854 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 122 changer transitions 0/305 dead transitions. [2024-06-04 16:15:45,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 305 transitions, 4469 flow [2024-06-04 16:15:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 278 transitions. [2024-06-04 16:15:45,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017316017316018 [2024-06-04 16:15:45,856 INFO L175 Difference]: Start difference. First operand has 197 places, 253 transitions, 3453 flow. Second operand 11 states and 278 transitions. [2024-06-04 16:15:45,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 305 transitions, 4469 flow [2024-06-04 16:15:46,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 305 transitions, 4380 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:46,256 INFO L231 Difference]: Finished difference. Result has 205 places, 255 transitions, 3709 flow [2024-06-04 16:15:46,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3709, PETRI_PLACES=205, PETRI_TRANSITIONS=255} [2024-06-04 16:15:46,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-04 16:15:46,257 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 255 transitions, 3709 flow [2024-06-04 16:15:46,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:46,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:46,257 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 16:15:46,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:15:46,257 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:46,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash -19276758, now seen corresponding path program 8 times [2024-06-04 16:15:46,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:46,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74387485] [2024-06-04 16:15:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:46,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:46,469 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 16:15:46,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:46,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74387485] [2024-06-04 16:15:46,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74387485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:46,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:46,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:46,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241625788] [2024-06-04 16:15:46,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:46,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:46,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:46,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:46,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:46,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 255 transitions, 3709 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:46,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:46,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:46,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:47,425 INFO L124 PetriNetUnfolderBase]: 3668/6356 cut-off events. [2024-06-04 16:15:47,425 INFO L125 PetriNetUnfolderBase]: For 324951/324951 co-relation queries the response was YES. [2024-06-04 16:15:47,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40787 conditions, 6356 events. 3668/6356 cut-off events. For 324951/324951 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 44691 event pairs, 1190 based on Foata normal form. 50/6405 useless extension candidates. Maximal degree in co-relation 40695. Up to 5005 conditions per place. [2024-06-04 16:15:47,484 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 186 selfloop transitions, 110 changer transitions 0/303 dead transitions. [2024-06-04 16:15:47,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 303 transitions, 4719 flow [2024-06-04 16:15:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-04 16:15:47,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611904761904762 [2024-06-04 16:15:47,485 INFO L175 Difference]: Start difference. First operand has 205 places, 255 transitions, 3709 flow. Second operand 10 states and 257 transitions. [2024-06-04 16:15:47,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 303 transitions, 4719 flow [2024-06-04 16:15:48,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 303 transitions, 4408 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-04 16:15:48,031 INFO L231 Difference]: Finished difference. Result has 206 places, 257 transitions, 3723 flow [2024-06-04 16:15:48,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3723, PETRI_PLACES=206, PETRI_TRANSITIONS=257} [2024-06-04 16:15:48,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-04 16:15:48,031 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 257 transitions, 3723 flow [2024-06-04 16:15:48,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:48,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:48,032 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 16:15:48,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:15:48,032 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:48,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash -218578548, now seen corresponding path program 9 times [2024-06-04 16:15:48,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:48,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894727399] [2024-06-04 16:15:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:48,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:48,237 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 16:15:48,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:48,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894727399] [2024-06-04 16:15:48,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894727399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:48,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:48,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:48,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549048566] [2024-06-04 16:15:48,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:48,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:48,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:48,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:48,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:48,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:48,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 257 transitions, 3723 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:48,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:48,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:48,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:49,209 INFO L124 PetriNetUnfolderBase]: 3865/6707 cut-off events. [2024-06-04 16:15:49,210 INFO L125 PetriNetUnfolderBase]: For 343360/343360 co-relation queries the response was YES. [2024-06-04 16:15:49,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42462 conditions, 6707 events. 3865/6707 cut-off events. For 343360/343360 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47703 event pairs, 1263 based on Foata normal form. 50/6756 useless extension candidates. Maximal degree in co-relation 42369. Up to 5344 conditions per place. [2024-06-04 16:15:49,274 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 109 changer transitions 0/306 dead transitions. [2024-06-04 16:15:49,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 306 transitions, 4847 flow [2024-06-04 16:15:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-04 16:15:49,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611904761904762 [2024-06-04 16:15:49,275 INFO L175 Difference]: Start difference. First operand has 206 places, 257 transitions, 3723 flow. Second operand 10 states and 257 transitions. [2024-06-04 16:15:49,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 306 transitions, 4847 flow [2024-06-04 16:15:50,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 306 transitions, 4556 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:50,068 INFO L231 Difference]: Finished difference. Result has 208 places, 259 transitions, 3759 flow [2024-06-04 16:15:50,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3432, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3759, PETRI_PLACES=208, PETRI_TRANSITIONS=259} [2024-06-04 16:15:50,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-04 16:15:50,068 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 259 transitions, 3759 flow [2024-06-04 16:15:50,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:50,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:50,069 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 16:15:50,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:15:50,069 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:50,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:50,070 INFO L85 PathProgramCache]: Analyzing trace with hash -480875516, now seen corresponding path program 10 times [2024-06-04 16:15:50,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:50,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524251581] [2024-06-04 16:15:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:50,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:50,234 INFO 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 16:15:50,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:50,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524251581] [2024-06-04 16:15:50,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524251581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:50,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:50,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:50,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621627459] [2024-06-04 16:15:50,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:50,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:50,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:50,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:50,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 259 transitions, 3759 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:50,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:50,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:50,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:51,396 INFO L124 PetriNetUnfolderBase]: 4204/7302 cut-off events. [2024-06-04 16:15:51,397 INFO L125 PetriNetUnfolderBase]: For 393141/393141 co-relation queries the response was YES. [2024-06-04 16:15:51,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46770 conditions, 7302 events. 4204/7302 cut-off events. For 393141/393141 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 52982 event pairs, 1337 based on Foata normal form. 42/7343 useless extension candidates. Maximal degree in co-relation 46676. Up to 4575 conditions per place. [2024-06-04 16:15:51,471 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 198 selfloop transitions, 112 changer transitions 0/317 dead transitions. [2024-06-04 16:15:51,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 317 transitions, 5115 flow [2024-06-04 16:15:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-04 16:15:51,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-04 16:15:51,474 INFO L175 Difference]: Start difference. First operand has 208 places, 259 transitions, 3759 flow. Second operand 10 states and 262 transitions. [2024-06-04 16:15:51,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 317 transitions, 5115 flow [2024-06-04 16:15:52,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 317 transitions, 4822 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:52,156 INFO L231 Difference]: Finished difference. Result has 211 places, 263 transitions, 3888 flow [2024-06-04 16:15:52,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3888, PETRI_PLACES=211, PETRI_TRANSITIONS=263} [2024-06-04 16:15:52,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-04 16:15:52,156 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 263 transitions, 3888 flow [2024-06-04 16:15:52,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:52,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:52,157 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 16:15:52,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:15:52,157 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:52,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:52,157 INFO L85 PathProgramCache]: Analyzing trace with hash -273801344, now seen corresponding path program 2 times [2024-06-04 16:15:52,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:52,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678201650] [2024-06-04 16:15:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:52,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:52,326 INFO 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 16:15:52,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:52,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678201650] [2024-06-04 16:15:52,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678201650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:52,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:52,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:52,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845570291] [2024-06-04 16:15:52,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:52,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:52,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:52,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:52,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:52,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:52,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 263 transitions, 3888 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:52,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:52,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:52,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:53,453 INFO L124 PetriNetUnfolderBase]: 4362/7618 cut-off events. [2024-06-04 16:15:53,454 INFO L125 PetriNetUnfolderBase]: For 408888/408888 co-relation queries the response was YES. [2024-06-04 16:15:53,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48269 conditions, 7618 events. 4362/7618 cut-off events. For 408888/408888 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 56108 event pairs, 1435 based on Foata normal form. 42/7659 useless extension candidates. Maximal degree in co-relation 48173. Up to 5505 conditions per place. [2024-06-04 16:15:53,541 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 194 selfloop transitions, 116 changer transitions 0/317 dead transitions. [2024-06-04 16:15:53,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 317 transitions, 4984 flow [2024-06-04 16:15:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-04 16:15:53,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-04 16:15:53,543 INFO L175 Difference]: Start difference. First operand has 211 places, 263 transitions, 3888 flow. Second operand 10 states and 261 transitions. [2024-06-04 16:15:53,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 317 transitions, 4984 flow [2024-06-04 16:15:54,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 317 transitions, 4735 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:54,058 INFO L231 Difference]: Finished difference. Result has 215 places, 265 transitions, 3986 flow [2024-06-04 16:15:54,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3639, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3986, PETRI_PLACES=215, PETRI_TRANSITIONS=265} [2024-06-04 16:15:54,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-04 16:15:54,059 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 265 transitions, 3986 flow [2024-06-04 16:15:54,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:54,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:54,060 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 16:15:54,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:15:54,060 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:54,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1410052894, now seen corresponding path program 3 times [2024-06-04 16:15:54,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:54,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172616002] [2024-06-04 16:15:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:54,228 INFO 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 16:15:54,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:54,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172616002] [2024-06-04 16:15:54,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172616002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:54,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:54,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:54,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474056584] [2024-06-04 16:15:54,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:54,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:54,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:54,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:54,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:54,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:54,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 265 transitions, 3986 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:54,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:54,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:54,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:55,450 INFO L124 PetriNetUnfolderBase]: 4513/7906 cut-off events. [2024-06-04 16:15:55,450 INFO L125 PetriNetUnfolderBase]: For 421789/421789 co-relation queries the response was YES. [2024-06-04 16:15:55,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49680 conditions, 7906 events. 4513/7906 cut-off events. For 421789/421789 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 58834 event pairs, 1518 based on Foata normal form. 42/7947 useless extension candidates. Maximal degree in co-relation 49582. Up to 6117 conditions per place. [2024-06-04 16:15:55,527 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 126 changer transitions 0/323 dead transitions. [2024-06-04 16:15:55,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 323 transitions, 5112 flow [2024-06-04 16:15:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 283 transitions. [2024-06-04 16:15:55,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125541125541125 [2024-06-04 16:15:55,529 INFO L175 Difference]: Start difference. First operand has 215 places, 265 transitions, 3986 flow. Second operand 11 states and 283 transitions. [2024-06-04 16:15:55,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 323 transitions, 5112 flow [2024-06-04 16:15:56,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 323 transitions, 4795 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:56,378 INFO L231 Difference]: Finished difference. Result has 218 places, 267 transitions, 4040 flow [2024-06-04 16:15:56,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3669, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4040, PETRI_PLACES=218, PETRI_TRANSITIONS=267} [2024-06-04 16:15:56,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-04 16:15:56,379 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 267 transitions, 4040 flow [2024-06-04 16:15:56,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:56,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:56,379 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 16:15:56,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:15:56,379 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:56,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1971913502, now seen corresponding path program 4 times [2024-06-04 16:15:56,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:56,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744812876] [2024-06-04 16:15:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:56,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:56,566 INFO 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 16:15:56,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:56,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744812876] [2024-06-04 16:15:56,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744812876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:56,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:56,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:56,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964145707] [2024-06-04 16:15:56,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:56,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:56,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:56,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:56,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 267 transitions, 4040 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:56,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:56,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:56,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:57,944 INFO L124 PetriNetUnfolderBase]: 4730/8310 cut-off events. [2024-06-04 16:15:57,944 INFO L125 PetriNetUnfolderBase]: For 458183/458183 co-relation queries the response was YES. [2024-06-04 16:15:58,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51490 conditions, 8310 events. 4730/8310 cut-off events. For 458183/458183 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 62366 event pairs, 1520 based on Foata normal form. 42/8351 useless extension candidates. Maximal degree in co-relation 51391. Up to 3581 conditions per place. [2024-06-04 16:15:58,034 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 185 selfloop transitions, 136 changer transitions 0/328 dead transitions. [2024-06-04 16:15:58,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 328 transitions, 5156 flow [2024-06-04 16:15:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 285 transitions. [2024-06-04 16:15:58,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168831168831169 [2024-06-04 16:15:58,036 INFO L175 Difference]: Start difference. First operand has 218 places, 267 transitions, 4040 flow. Second operand 11 states and 285 transitions. [2024-06-04 16:15:58,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 328 transitions, 5156 flow [2024-06-04 16:15:58,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 328 transitions, 4815 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-04 16:15:58,555 INFO L231 Difference]: Finished difference. Result has 219 places, 267 transitions, 3934 flow [2024-06-04 16:15:58,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3934, PETRI_PLACES=219, PETRI_TRANSITIONS=267} [2024-06-04 16:15:58,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-04 16:15:58,556 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 267 transitions, 3934 flow [2024-06-04 16:15:58,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:58,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:58,556 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 16:15:58,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:15:58,557 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 16:15:58,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:58,558 INFO L85 PathProgramCache]: Analyzing trace with hash 781300252, now seen corresponding path program 3 times [2024-06-04 16:15:58,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:58,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749711305] [2024-06-04 16:15:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:58,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:58,784 INFO 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 16:15:58,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:58,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749711305] [2024-06-04 16:15:58,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749711305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:58,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:58,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:58,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62459878] [2024-06-04 16:15:58,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:58,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:58,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:58,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:58,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:58,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:58,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 267 transitions, 3934 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 16:15:58,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:58,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:58,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:59,970 INFO L124 PetriNetUnfolderBase]: 4724/8295 cut-off events. [2024-06-04 16:15:59,970 INFO L125 PetriNetUnfolderBase]: For 404038/404038 co-relation queries the response was YES. [2024-06-04 16:16:00,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51232 conditions, 8295 events. 4724/8295 cut-off events. For 404038/404038 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 62621 event pairs, 1795 based on Foata normal form. 2/8296 useless extension candidates. Maximal degree in co-relation 51132. Up to 7441 conditions per place. [2024-06-04 16:16:00,063 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 71 changer transitions 0/296 dead transitions. [2024-06-04 16:16:00,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 296 transitions, 4800 flow [2024-06-04 16:16:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 16:16:00,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 16:16:00,065 INFO L175 Difference]: Start difference. First operand has 219 places, 267 transitions, 3934 flow. Second operand 8 states and 198 transitions. [2024-06-04 16:16:00,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 296 transitions, 4800 flow [2024-06-04 16:16:00,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 296 transitions, 4366 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-06-04 16:16:00,851 INFO L231 Difference]: Finished difference. Result has 217 places, 267 transitions, 3651 flow [2024-06-04 16:16:00,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3651, PETRI_PLACES=217, PETRI_TRANSITIONS=267} [2024-06-04 16:16:00,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-04 16:16:00,852 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 267 transitions, 3651 flow [2024-06-04 16:16:00,852 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 16:16:00,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:00,853 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 16:16:00,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:16:00,853 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 16:16:00,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:00,853 INFO L85 PathProgramCache]: Analyzing trace with hash -227114182, now seen corresponding path program 4 times [2024-06-04 16:16:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:00,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579637166] [2024-06-04 16:16:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:00,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:01,033 INFO 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 16:16:01,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:01,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579637166] [2024-06-04 16:16:01,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579637166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:01,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:01,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:01,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050041875] [2024-06-04 16:16:01,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:01,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:01,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:01,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:01,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 267 transitions, 3651 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 16:16:01,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:01,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:01,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:02,145 INFO L124 PetriNetUnfolderBase]: 4581/8048 cut-off events. [2024-06-04 16:16:02,145 INFO L125 PetriNetUnfolderBase]: For 362629/362629 co-relation queries the response was YES. [2024-06-04 16:16:02,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47521 conditions, 8048 events. 4581/8048 cut-off events. For 362629/362629 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 60333 event pairs, 1731 based on Foata normal form. 4/8051 useless extension candidates. Maximal degree in co-relation 47421. Up to 7223 conditions per place. [2024-06-04 16:16:02,224 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 214 selfloop transitions, 72 changer transitions 0/293 dead transitions. [2024-06-04 16:16:02,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 293 transitions, 4397 flow [2024-06-04 16:16:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-04 16:16:02,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-04 16:16:02,225 INFO L175 Difference]: Start difference. First operand has 217 places, 267 transitions, 3651 flow. Second operand 9 states and 214 transitions. [2024-06-04 16:16:02,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 293 transitions, 4397 flow [2024-06-04 16:16:02,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 293 transitions, 4286 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:02,788 INFO L231 Difference]: Finished difference. Result has 221 places, 267 transitions, 3693 flow [2024-06-04 16:16:02,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3693, PETRI_PLACES=221, PETRI_TRANSITIONS=267} [2024-06-04 16:16:02,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-04 16:16:02,789 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 267 transitions, 3693 flow [2024-06-04 16:16:02,789 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 16:16:02,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:02,790 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 16:16:02,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:16:02,790 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 16:16:02,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:02,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1395175872, now seen corresponding path program 5 times [2024-06-04 16:16:02,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:02,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506258696] [2024-06-04 16:16:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:02,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:02,955 INFO 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 16:16:02,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:02,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506258696] [2024-06-04 16:16:02,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506258696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:02,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:02,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:02,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335133129] [2024-06-04 16:16:02,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:02,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:02,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:02,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:02,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:02,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:02,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 267 transitions, 3693 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 16:16:02,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:02,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:02,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:04,119 INFO L124 PetriNetUnfolderBase]: 4490/7866 cut-off events. [2024-06-04 16:16:04,119 INFO L125 PetriNetUnfolderBase]: For 367476/367476 co-relation queries the response was YES. [2024-06-04 16:16:04,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46886 conditions, 7866 events. 4490/7866 cut-off events. For 367476/367476 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 58455 event pairs, 1698 based on Foata normal form. 2/7866 useless extension candidates. Maximal degree in co-relation 46785. Up to 7058 conditions per place. [2024-06-04 16:16:04,186 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 80 changer transitions 2/287 dead transitions. [2024-06-04 16:16:04,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 287 transitions, 4525 flow [2024-06-04 16:16:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:16:04,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-04 16:16:04,191 INFO L175 Difference]: Start difference. First operand has 221 places, 267 transitions, 3693 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:16:04,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 287 transitions, 4525 flow [2024-06-04 16:16:04,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 287 transitions, 4347 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:04,712 INFO L231 Difference]: Finished difference. Result has 220 places, 265 transitions, 3649 flow [2024-06-04 16:16:04,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3649, PETRI_PLACES=220, PETRI_TRANSITIONS=265} [2024-06-04 16:16:04,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-04 16:16:04,713 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 265 transitions, 3649 flow [2024-06-04 16:16:04,713 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 16:16:04,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:04,713 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 16:16:04,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:16:04,714 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 16:16:04,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash 981017752, now seen corresponding path program 6 times [2024-06-04 16:16:04,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:04,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582563833] [2024-06-04 16:16:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:04,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:04,922 INFO 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 16:16:04,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582563833] [2024-06-04 16:16:04,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582563833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:04,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:04,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:04,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062205656] [2024-06-04 16:16:04,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:04,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:04,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:04,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:04,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:04,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 265 transitions, 3649 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 16:16:04,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:04,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:04,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:05,965 INFO L124 PetriNetUnfolderBase]: 4357/7620 cut-off events. [2024-06-04 16:16:05,965 INFO L125 PetriNetUnfolderBase]: For 374809/374809 co-relation queries the response was YES. [2024-06-04 16:16:06,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45858 conditions, 7620 events. 4357/7620 cut-off events. For 374809/374809 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 56135 event pairs, 1643 based on Foata normal form. 2/7620 useless extension candidates. Maximal degree in co-relation 45757. Up to 6831 conditions per place. [2024-06-04 16:16:06,048 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 199 selfloop transitions, 77 changer transitions 2/285 dead transitions. [2024-06-04 16:16:06,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 285 transitions, 4367 flow [2024-06-04 16:16:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:16:06,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-04 16:16:06,050 INFO L175 Difference]: Start difference. First operand has 220 places, 265 transitions, 3649 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:16:06,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 285 transitions, 4367 flow [2024-06-04 16:16:06,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 285 transitions, 4101 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:06,689 INFO L231 Difference]: Finished difference. Result has 220 places, 263 transitions, 3518 flow [2024-06-04 16:16:06,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3518, PETRI_PLACES=220, PETRI_TRANSITIONS=263} [2024-06-04 16:16:06,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-04 16:16:06,689 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 263 transitions, 3518 flow [2024-06-04 16:16:06,689 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 16:16:06,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:06,690 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 16:16:06,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:16:06,690 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 16:16:06,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:06,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1424635089, now seen corresponding path program 1 times [2024-06-04 16:16:06,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:06,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143931551] [2024-06-04 16:16:06,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:06,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:06,874 INFO 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 16:16:06,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:06,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143931551] [2024-06-04 16:16:06,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143931551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:06,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:06,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:06,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133312427] [2024-06-04 16:16:06,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:06,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:06,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:06,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 263 transitions, 3518 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 16:16:06,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:06,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:06,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:07,974 INFO L124 PetriNetUnfolderBase]: 4373/7663 cut-off events. [2024-06-04 16:16:07,974 INFO L125 PetriNetUnfolderBase]: For 391003/391003 co-relation queries the response was YES. [2024-06-04 16:16:08,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46514 conditions, 7663 events. 4373/7663 cut-off events. For 391003/391003 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 56548 event pairs, 1631 based on Foata normal form. 2/7664 useless extension candidates. Maximal degree in co-relation 46412. Up to 6943 conditions per place. [2024-06-04 16:16:08,050 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 247 selfloop transitions, 53 changer transitions 4/311 dead transitions. [2024-06-04 16:16:08,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 311 transitions, 4702 flow [2024-06-04 16:16:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:16:08,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:16:08,051 INFO L175 Difference]: Start difference. First operand has 220 places, 263 transitions, 3518 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:16:08,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 311 transitions, 4702 flow [2024-06-04 16:16:08,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 311 transitions, 4418 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 16:16:08,811 INFO L231 Difference]: Finished difference. Result has 220 places, 281 transitions, 3742 flow [2024-06-04 16:16:08,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3742, PETRI_PLACES=220, PETRI_TRANSITIONS=281} [2024-06-04 16:16:08,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-04 16:16:08,812 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 281 transitions, 3742 flow [2024-06-04 16:16:08,812 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 16:16:08,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:08,812 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 16:16:08,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:16:08,812 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 16:16:08,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:08,813 INFO L85 PathProgramCache]: Analyzing trace with hash -215077409, now seen corresponding path program 2 times [2024-06-04 16:16:08,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:08,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450372022] [2024-06-04 16:16:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:08,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:09,035 INFO 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 16:16:09,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450372022] [2024-06-04 16:16:09,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450372022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:09,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:09,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:09,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255698829] [2024-06-04 16:16:09,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:09,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:09,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:09,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:09,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:09,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:09,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 281 transitions, 3742 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 16:16:09,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:09,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:09,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:10,105 INFO L124 PetriNetUnfolderBase]: 4371/7658 cut-off events. [2024-06-04 16:16:10,106 INFO L125 PetriNetUnfolderBase]: For 402529/402529 co-relation queries the response was YES. [2024-06-04 16:16:10,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46594 conditions, 7658 events. 4371/7658 cut-off events. For 402529/402529 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 56532 event pairs, 1631 based on Foata normal form. 3/7660 useless extension candidates. Maximal degree in co-relation 46489. Up to 6830 conditions per place. [2024-06-04 16:16:10,192 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 92 changer transitions 2/314 dead transitions. [2024-06-04 16:16:10,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 314 transitions, 4772 flow [2024-06-04 16:16:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:16:10,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-04 16:16:10,194 INFO L175 Difference]: Start difference. First operand has 220 places, 281 transitions, 3742 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:16:10,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 314 transitions, 4772 flow [2024-06-04 16:16:11,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 314 transitions, 4747 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:16:11,132 INFO L231 Difference]: Finished difference. Result has 225 places, 286 transitions, 3990 flow [2024-06-04 16:16:11,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3990, PETRI_PLACES=225, PETRI_TRANSITIONS=286} [2024-06-04 16:16:11,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-04 16:16:11,134 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 286 transitions, 3990 flow [2024-06-04 16:16:11,135 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 16:16:11,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:11,135 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 16:16:11,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:16:11,135 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 16:16:11,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1676247133, now seen corresponding path program 3 times [2024-06-04 16:16:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:11,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709535768] [2024-06-04 16:16:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:11,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:11,332 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 16:16:11,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:11,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709535768] [2024-06-04 16:16:11,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709535768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:11,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:11,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:11,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928088513] [2024-06-04 16:16:11,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:11,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:11,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:11,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:11,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 286 transitions, 3990 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 16:16:11,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:11,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:11,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:12,467 INFO L124 PetriNetUnfolderBase]: 4297/7513 cut-off events. [2024-06-04 16:16:12,468 INFO L125 PetriNetUnfolderBase]: For 410187/410187 co-relation queries the response was YES. [2024-06-04 16:16:12,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46357 conditions, 7513 events. 4297/7513 cut-off events. For 410187/410187 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 55158 event pairs, 1599 based on Foata normal form. 2/7513 useless extension candidates. Maximal degree in co-relation 46250. Up to 6698 conditions per place. [2024-06-04 16:16:12,567 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 85 changer transitions 5/304 dead transitions. [2024-06-04 16:16:12,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 304 transitions, 4748 flow [2024-06-04 16:16:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:16:12,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:16:12,569 INFO L175 Difference]: Start difference. First operand has 225 places, 286 transitions, 3990 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:16:12,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 304 transitions, 4748 flow [2024-06-04 16:16:13,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 304 transitions, 4657 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:13,289 INFO L231 Difference]: Finished difference. Result has 228 places, 281 transitions, 3986 flow [2024-06-04 16:16:13,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3986, PETRI_PLACES=228, PETRI_TRANSITIONS=281} [2024-06-04 16:16:13,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-04 16:16:13,291 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 281 transitions, 3986 flow [2024-06-04 16:16:13,291 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 16:16:13,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:13,298 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 16:16:13,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:16:13,299 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 16:16:13,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash -430718847, now seen corresponding path program 1 times [2024-06-04 16:16:13,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:13,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578071943] [2024-06-04 16:16:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:13,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:13,510 INFO 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 16:16:13,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:13,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578071943] [2024-06-04 16:16:13,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578071943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:13,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:13,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:13,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960540343] [2024-06-04 16:16:13,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:13,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:13,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:13,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:13,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:16:13,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 281 transitions, 3986 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 16:16:13,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:13,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:16:13,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:14,630 INFO L124 PetriNetUnfolderBase]: 3949/6999 cut-off events. [2024-06-04 16:16:14,630 INFO L125 PetriNetUnfolderBase]: For 439724/439724 co-relation queries the response was YES. [2024-06-04 16:16:14,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44190 conditions, 6999 events. 3949/6999 cut-off events. For 439724/439724 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 51481 event pairs, 1416 based on Foata normal form. 17/6965 useless extension candidates. Maximal degree in co-relation 44082. Up to 6138 conditions per place. [2024-06-04 16:16:14,707 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 236 selfloop transitions, 31 changer transitions 0/306 dead transitions. [2024-06-04 16:16:14,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 306 transitions, 4643 flow [2024-06-04 16:16:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:16:14,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:16:14,709 INFO L175 Difference]: Start difference. First operand has 228 places, 281 transitions, 3986 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:16:14,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 306 transitions, 4643 flow [2024-06-04 16:16:15,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 306 transitions, 4247 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-04 16:16:15,559 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 3721 flow [2024-06-04 16:16:15,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3590, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3721, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2024-06-04 16:16:15,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-04 16:16:15,559 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 3721 flow [2024-06-04 16:16:15,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 16:16:15,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:15,560 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 16:16:15,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:16:15,560 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 16:16:15,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:15,560 INFO L85 PathProgramCache]: Analyzing trace with hash 531995057, now seen corresponding path program 2 times [2024-06-04 16:16:15,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:15,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322795609] [2024-06-04 16:16:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:15,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:15,765 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 16:16:15,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:15,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322795609] [2024-06-04 16:16:15,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322795609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:15,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:15,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:15,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314763198] [2024-06-04 16:16:15,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:15,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:15,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:15,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:16:15,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 3721 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 16:16:15,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:15,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:16:15,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:16,880 INFO L124 PetriNetUnfolderBase]: 3997/7085 cut-off events. [2024-06-04 16:16:16,880 INFO L125 PetriNetUnfolderBase]: For 439094/439094 co-relation queries the response was YES. [2024-06-04 16:16:16,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44746 conditions, 7085 events. 3997/7085 cut-off events. For 439094/439094 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52375 event pairs, 1392 based on Foata normal form. 8/7045 useless extension candidates. Maximal degree in co-relation 44638. Up to 6096 conditions per place. [2024-06-04 16:16:16,960 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 243 selfloop transitions, 32 changer transitions 0/314 dead transitions. [2024-06-04 16:16:16,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 314 transitions, 4560 flow [2024-06-04 16:16:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:16:16,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:16:16,962 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 3721 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:16:16,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 314 transitions, 4560 flow [2024-06-04 16:16:17,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 314 transitions, 4480 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:17,666 INFO L231 Difference]: Finished difference. Result has 229 places, 287 transitions, 3780 flow [2024-06-04 16:16:17,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3641, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3780, PETRI_PLACES=229, PETRI_TRANSITIONS=287} [2024-06-04 16:16:17,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-04 16:16:17,667 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 287 transitions, 3780 flow [2024-06-04 16:16:17,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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 16:16:17,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:17,667 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 16:16:17,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:16:17,668 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 16:16:17,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:17,668 INFO L85 PathProgramCache]: Analyzing trace with hash -848471015, now seen corresponding path program 1 times [2024-06-04 16:16:17,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:17,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534298973] [2024-06-04 16:16:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:17,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:17,844 INFO 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 16:16:17,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:17,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534298973] [2024-06-04 16:16:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534298973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:17,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:17,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:17,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580050332] [2024-06-04 16:16:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:17,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:17,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:17,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:17,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 287 transitions, 3780 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:17,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:17,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:17,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:18,914 INFO L124 PetriNetUnfolderBase]: 4187/7331 cut-off events. [2024-06-04 16:16:18,914 INFO L125 PetriNetUnfolderBase]: For 440397/440397 co-relation queries the response was YES. [2024-06-04 16:16:18,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46143 conditions, 7331 events. 4187/7331 cut-off events. For 440397/440397 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53463 event pairs, 1421 based on Foata normal form. 2/7332 useless extension candidates. Maximal degree in co-relation 46033. Up to 6692 conditions per place. [2024-06-04 16:16:19,003 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 281 selfloop transitions, 22 changer transitions 0/310 dead transitions. [2024-06-04 16:16:19,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 310 transitions, 4674 flow [2024-06-04 16:16:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:16:19,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:16:19,004 INFO L175 Difference]: Start difference. First operand has 229 places, 287 transitions, 3780 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:16:19,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 310 transitions, 4674 flow [2024-06-04 16:16:19,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 310 transitions, 4629 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:19,889 INFO L231 Difference]: Finished difference. Result has 231 places, 291 transitions, 3904 flow [2024-06-04 16:16:19,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3735, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3904, PETRI_PLACES=231, PETRI_TRANSITIONS=291} [2024-06-04 16:16:19,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-04 16:16:19,890 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 291 transitions, 3904 flow [2024-06-04 16:16:19,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:19,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:19,890 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 16:16:19,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:16:19,890 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 16:16:19,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:19,891 INFO L85 PathProgramCache]: Analyzing trace with hash -848410565, now seen corresponding path program 2 times [2024-06-04 16:16:19,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:19,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852847213] [2024-06-04 16:16:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:19,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:20,055 INFO 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 16:16:20,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:20,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852847213] [2024-06-04 16:16:20,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852847213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:20,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:20,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373733806] [2024-06-04 16:16:20,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:20,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:20,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:20,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:20,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:20,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:20,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 291 transitions, 3904 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:20,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:20,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:20,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:21,223 INFO L124 PetriNetUnfolderBase]: 4182/7324 cut-off events. [2024-06-04 16:16:21,223 INFO L125 PetriNetUnfolderBase]: For 449107/449107 co-relation queries the response was YES. [2024-06-04 16:16:21,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46177 conditions, 7324 events. 4182/7324 cut-off events. For 449107/449107 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53425 event pairs, 1504 based on Foata normal form. 2/7325 useless extension candidates. Maximal degree in co-relation 46065. Up to 6720 conditions per place. [2024-06-04 16:16:21,301 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 278 selfloop transitions, 20 changer transitions 0/305 dead transitions. [2024-06-04 16:16:21,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 305 transitions, 4534 flow [2024-06-04 16:16:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 16:16:21,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:16:21,302 INFO L175 Difference]: Start difference. First operand has 231 places, 291 transitions, 3904 flow. Second operand 6 states and 138 transitions. [2024-06-04 16:16:21,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 305 transitions, 4534 flow [2024-06-04 16:16:22,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 305 transitions, 4415 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-04 16:16:22,017 INFO L231 Difference]: Finished difference. Result has 235 places, 291 transitions, 3830 flow [2024-06-04 16:16:22,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3785, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3830, PETRI_PLACES=235, PETRI_TRANSITIONS=291} [2024-06-04 16:16:22,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-04 16:16:22,018 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 291 transitions, 3830 flow [2024-06-04 16:16:22,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:22,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:22,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:22,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:16:22,019 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 16:16:22,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:22,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1922542821, now seen corresponding path program 1 times [2024-06-04 16:16:22,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:22,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574775150] [2024-06-04 16:16:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:22,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:22,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:22,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574775150] [2024-06-04 16:16:22,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574775150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:22,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:22,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:22,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764994955] [2024-06-04 16:16:22,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:22,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:22,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:22,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:22,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:22,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 291 transitions, 3830 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 16:16:22,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:22,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:22,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:23,376 INFO L124 PetriNetUnfolderBase]: 4254/7440 cut-off events. [2024-06-04 16:16:23,377 INFO L125 PetriNetUnfolderBase]: For 502035/502035 co-relation queries the response was YES. [2024-06-04 16:16:23,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46904 conditions, 7440 events. 4254/7440 cut-off events. For 502035/502035 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54284 event pairs, 1512 based on Foata normal form. 20/7459 useless extension candidates. Maximal degree in co-relation 46790. Up to 6538 conditions per place. [2024-06-04 16:16:23,458 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 94 changer transitions 0/325 dead transitions. [2024-06-04 16:16:23,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 325 transitions, 4744 flow [2024-06-04 16:16:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-04 16:16:23,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:16:23,459 INFO L175 Difference]: Start difference. First operand has 235 places, 291 transitions, 3830 flow. Second operand 10 states and 235 transitions. [2024-06-04 16:16:23,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 325 transitions, 4744 flow [2024-06-04 16:16:24,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 325 transitions, 4694 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:24,477 INFO L231 Difference]: Finished difference. Result has 240 places, 294 transitions, 4045 flow [2024-06-04 16:16:24,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4045, PETRI_PLACES=240, PETRI_TRANSITIONS=294} [2024-06-04 16:16:24,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-04 16:16:24,478 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 294 transitions, 4045 flow [2024-06-04 16:16:24,478 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 16:16:24,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:24,478 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 16:16:24,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:16:24,478 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 16:16:24,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash -424045663, now seen corresponding path program 2 times [2024-06-04 16:16:24,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:24,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110317910] [2024-06-04 16:16:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:24,689 INFO 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 16:16:24,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:24,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110317910] [2024-06-04 16:16:24,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110317910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:24,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:24,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:24,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082051164] [2024-06-04 16:16:24,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:24,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:24,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:24,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:24,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:24,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:24,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 294 transitions, 4045 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 16:16:24,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:24,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:24,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:26,024 INFO L124 PetriNetUnfolderBase]: 4270/7467 cut-off events. [2024-06-04 16:16:26,024 INFO L125 PetriNetUnfolderBase]: For 483844/483844 co-relation queries the response was YES. [2024-06-04 16:16:26,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47801 conditions, 7467 events. 4270/7467 cut-off events. For 483844/483844 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54571 event pairs, 1524 based on Foata normal form. 4/7469 useless extension candidates. Maximal degree in co-relation 47686. Up to 6632 conditions per place. [2024-06-04 16:16:26,114 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 106 changer transitions 0/318 dead transitions. [2024-06-04 16:16:26,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 318 transitions, 4917 flow [2024-06-04 16:16:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:16:26,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-04 16:16:26,116 INFO L175 Difference]: Start difference. First operand has 240 places, 294 transitions, 4045 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:16:26,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 318 transitions, 4917 flow [2024-06-04 16:16:27,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 318 transitions, 4684 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:27,219 INFO L231 Difference]: Finished difference. Result has 241 places, 297 transitions, 4104 flow [2024-06-04 16:16:27,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4104, PETRI_PLACES=241, PETRI_TRANSITIONS=297} [2024-06-04 16:16:27,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-04 16:16:27,219 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 297 transitions, 4104 flow [2024-06-04 16:16:27,220 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 16:16:27,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:27,220 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 16:16:27,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:16:27,220 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 16:16:27,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1927684805, now seen corresponding path program 3 times [2024-06-04 16:16:27,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:27,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284300222] [2024-06-04 16:16:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:27,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:27,411 INFO 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 16:16:27,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:27,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284300222] [2024-06-04 16:16:27,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284300222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:27,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:27,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:27,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759887296] [2024-06-04 16:16:27,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:27,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:27,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:27,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:27,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:27,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:27,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 297 transitions, 4104 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 16:16:27,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:27,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:27,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:28,570 INFO L124 PetriNetUnfolderBase]: 4286/7491 cut-off events. [2024-06-04 16:16:28,570 INFO L125 PetriNetUnfolderBase]: For 498923/498923 co-relation queries the response was YES. [2024-06-04 16:16:28,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48058 conditions, 7491 events. 4286/7491 cut-off events. For 498923/498923 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54683 event pairs, 1528 based on Foata normal form. 4/7493 useless extension candidates. Maximal degree in co-relation 47942. Up to 6654 conditions per place. [2024-06-04 16:16:28,653 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 214 selfloop transitions, 101 changer transitions 0/322 dead transitions. [2024-06-04 16:16:28,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 322 transitions, 4994 flow [2024-06-04 16:16:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-04 16:16:28,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-04 16:16:28,654 INFO L175 Difference]: Start difference. First operand has 241 places, 297 transitions, 4104 flow. Second operand 10 states and 227 transitions. [2024-06-04 16:16:28,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 322 transitions, 4994 flow [2024-06-04 16:16:29,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 322 transitions, 4724 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:29,699 INFO L231 Difference]: Finished difference. Result has 244 places, 300 transitions, 4123 flow [2024-06-04 16:16:29,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3834, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4123, PETRI_PLACES=244, PETRI_TRANSITIONS=300} [2024-06-04 16:16:29,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-04 16:16:29,700 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 300 transitions, 4123 flow [2024-06-04 16:16:29,700 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 16:16:29,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:29,700 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 16:16:29,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:16:29,700 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 16:16:29,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:29,701 INFO L85 PathProgramCache]: Analyzing trace with hash 583713731, now seen corresponding path program 4 times [2024-06-04 16:16:29,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:29,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532919120] [2024-06-04 16:16:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:29,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:29,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:29,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532919120] [2024-06-04 16:16:29,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532919120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:29,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:29,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:29,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704956328] [2024-06-04 16:16:29,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:29,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:29,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:29,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:29,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:30,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:30,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 300 transitions, 4123 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 16:16:30,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:30,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:30,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:31,118 INFO L124 PetriNetUnfolderBase]: 4289/7496 cut-off events. [2024-06-04 16:16:31,119 INFO L125 PetriNetUnfolderBase]: For 509262/509262 co-relation queries the response was YES. [2024-06-04 16:16:31,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48113 conditions, 7496 events. 4289/7496 cut-off events. For 509262/509262 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54857 event pairs, 1509 based on Foata normal form. 4/7498 useless extension candidates. Maximal degree in co-relation 47996. Up to 6537 conditions per place. [2024-06-04 16:16:31,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 206 selfloop transitions, 117 changer transitions 0/330 dead transitions. [2024-06-04 16:16:31,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 330 transitions, 5084 flow [2024-06-04 16:16:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:16:31,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:16:31,205 INFO L175 Difference]: Start difference. First operand has 244 places, 300 transitions, 4123 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:16:31,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 330 transitions, 5084 flow [2024-06-04 16:16:32,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 330 transitions, 4819 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:32,215 INFO L231 Difference]: Finished difference. Result has 246 places, 305 transitions, 4235 flow [2024-06-04 16:16:32,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4235, PETRI_PLACES=246, PETRI_TRANSITIONS=305} [2024-06-04 16:16:32,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-04 16:16:32,216 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 305 transitions, 4235 flow [2024-06-04 16:16:32,216 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 16:16:32,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:32,217 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 16:16:32,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:16:32,217 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 16:16:32,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash -291010471, now seen corresponding path program 1 times [2024-06-04 16:16:32,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:32,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726859167] [2024-06-04 16:16:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:32,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:32,420 INFO 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 16:16:32,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:32,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726859167] [2024-06-04 16:16:32,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726859167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:32,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:32,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:32,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721173635] [2024-06-04 16:16:32,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:32,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:32,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:32,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:32,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:32,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:32,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 305 transitions, 4235 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 16:16:32,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:32,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:32,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:33,557 INFO L124 PetriNetUnfolderBase]: 4291/7495 cut-off events. [2024-06-04 16:16:33,557 INFO L125 PetriNetUnfolderBase]: For 515253/515253 co-relation queries the response was YES. [2024-06-04 16:16:33,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48409 conditions, 7495 events. 4291/7495 cut-off events. For 515253/515253 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54697 event pairs, 1509 based on Foata normal form. 2/7496 useless extension candidates. Maximal degree in co-relation 48290. Up to 6817 conditions per place. [2024-06-04 16:16:33,641 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 44 changer transitions 0/336 dead transitions. [2024-06-04 16:16:33,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 336 transitions, 5150 flow [2024-06-04 16:16:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:16:33,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-04 16:16:33,643 INFO L175 Difference]: Start difference. First operand has 246 places, 305 transitions, 4235 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:16:33,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 336 transitions, 5150 flow [2024-06-04 16:16:34,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 336 transitions, 4920 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:34,754 INFO L231 Difference]: Finished difference. Result has 249 places, 308 transitions, 4152 flow [2024-06-04 16:16:34,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4152, PETRI_PLACES=249, PETRI_TRANSITIONS=308} [2024-06-04 16:16:34,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-04 16:16:34,755 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 308 transitions, 4152 flow [2024-06-04 16:16:34,755 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 16:16:34,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:34,755 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 16:16:34,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:16:34,755 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 16:16:34,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:34,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1149284775, now seen corresponding path program 2 times [2024-06-04 16:16:34,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:34,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993454493] [2024-06-04 16:16:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:34,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:34,972 INFO 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 16:16:34,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:34,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993454493] [2024-06-04 16:16:34,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993454493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:34,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:34,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:34,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991955456] [2024-06-04 16:16:34,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:34,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:34,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:34,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:34,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:35,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:35,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 308 transitions, 4152 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 16:16:35,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:35,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:35,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:36,154 INFO L124 PetriNetUnfolderBase]: 4301/7511 cut-off events. [2024-06-04 16:16:36,155 INFO L125 PetriNetUnfolderBase]: For 524290/524290 co-relation queries the response was YES. [2024-06-04 16:16:36,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48546 conditions, 7511 events. 4301/7511 cut-off events. For 524290/524290 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54814 event pairs, 1515 based on Foata normal form. 1/7511 useless extension candidates. Maximal degree in co-relation 48425. Up to 6823 conditions per place. [2024-06-04 16:16:36,241 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 51 changer transitions 0/344 dead transitions. [2024-06-04 16:16:36,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 344 transitions, 5137 flow [2024-06-04 16:16:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-04 16:16:36,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:16:36,243 INFO L175 Difference]: Start difference. First operand has 249 places, 308 transitions, 4152 flow. Second operand 10 states and 230 transitions. [2024-06-04 16:16:36,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 344 transitions, 5137 flow [2024-06-04 16:16:37,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 344 transitions, 5048 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:37,583 INFO L231 Difference]: Finished difference. Result has 254 places, 314 transitions, 4270 flow [2024-06-04 16:16:37,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4270, PETRI_PLACES=254, PETRI_TRANSITIONS=314} [2024-06-04 16:16:37,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-04 16:16:37,584 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 314 transitions, 4270 flow [2024-06-04 16:16:37,584 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 16:16:37,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:37,585 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 16:16:37,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:16:37,585 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 16:16:37,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash -895802785, now seen corresponding path program 3 times [2024-06-04 16:16:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:37,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475736485] [2024-06-04 16:16:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:37,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:37,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:37,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475736485] [2024-06-04 16:16:37,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475736485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:37,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:37,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:37,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984448516] [2024-06-04 16:16:37,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:37,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:37,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:37,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:37,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:37,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:37,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 314 transitions, 4270 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 16:16:37,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:37,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:37,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:38,987 INFO L124 PetriNetUnfolderBase]: 4311/7529 cut-off events. [2024-06-04 16:16:38,987 INFO L125 PetriNetUnfolderBase]: For 541542/541542 co-relation queries the response was YES. [2024-06-04 16:16:39,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48861 conditions, 7529 events. 4311/7529 cut-off events. For 541542/541542 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54982 event pairs, 1505 based on Foata normal form. 2/7529 useless extension candidates. Maximal degree in co-relation 48739. Up to 6389 conditions per place. [2024-06-04 16:16:39,080 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 207 selfloop transitions, 132 changer transitions 0/346 dead transitions. [2024-06-04 16:16:39,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 346 transitions, 5638 flow [2024-06-04 16:16:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 16:16:39,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-04 16:16:39,081 INFO L175 Difference]: Start difference. First operand has 254 places, 314 transitions, 4270 flow. Second operand 8 states and 203 transitions. [2024-06-04 16:16:39,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 346 transitions, 5638 flow [2024-06-04 16:16:40,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 346 transitions, 5524 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:40,562 INFO L231 Difference]: Finished difference. Result has 255 places, 318 transitions, 4485 flow [2024-06-04 16:16:40,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4485, PETRI_PLACES=255, PETRI_TRANSITIONS=318} [2024-06-04 16:16:40,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-04 16:16:40,563 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 318 transitions, 4485 flow [2024-06-04 16:16:40,563 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 16:16:40,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:40,563 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 16:16:40,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:16:40,563 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 16:16:40,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:40,564 INFO L85 PathProgramCache]: Analyzing trace with hash -155865591, now seen corresponding path program 4 times [2024-06-04 16:16:40,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:40,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862371300] [2024-06-04 16:16:40,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:40,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:40,779 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 16:16:40,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:40,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862371300] [2024-06-04 16:16:40,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862371300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:40,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:40,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:40,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379290498] [2024-06-04 16:16:40,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:40,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:40,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:40,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:40,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 318 transitions, 4485 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 16:16:40,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:40,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:40,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:42,008 INFO L124 PetriNetUnfolderBase]: 4313/7534 cut-off events. [2024-06-04 16:16:42,008 INFO L125 PetriNetUnfolderBase]: For 555115/555115 co-relation queries the response was YES. [2024-06-04 16:16:42,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49402 conditions, 7534 events. 4313/7534 cut-off events. For 555115/555115 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55027 event pairs, 1505 based on Foata normal form. 2/7534 useless extension candidates. Maximal degree in co-relation 49279. Up to 6389 conditions per place. [2024-06-04 16:16:42,108 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 201 selfloop transitions, 137 changer transitions 0/345 dead transitions. [2024-06-04 16:16:42,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 345 transitions, 5699 flow [2024-06-04 16:16:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 16:16:42,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 16:16:42,109 INFO L175 Difference]: Start difference. First operand has 255 places, 318 transitions, 4485 flow. Second operand 8 states and 198 transitions. [2024-06-04 16:16:42,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 345 transitions, 5699 flow [2024-06-04 16:16:43,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 345 transitions, 5447 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:43,263 INFO L231 Difference]: Finished difference. Result has 258 places, 321 transitions, 4564 flow [2024-06-04 16:16:43,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4564, PETRI_PLACES=258, PETRI_TRANSITIONS=321} [2024-06-04 16:16:43,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-04 16:16:43,264 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 321 transitions, 4564 flow [2024-06-04 16:16:43,265 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 16:16:43,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:43,265 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 16:16:43,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:16:43,265 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 16:16:43,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1076033547, now seen corresponding path program 5 times [2024-06-04 16:16:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:43,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464678645] [2024-06-04 16:16:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:43,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:43,449 INFO 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 16:16:43,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:43,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464678645] [2024-06-04 16:16:43,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464678645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:43,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:43,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:43,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852766964] [2024-06-04 16:16:43,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:43,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:43,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:43,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:43,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 321 transitions, 4564 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 16:16:43,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:43,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:43,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:44,786 INFO L124 PetriNetUnfolderBase]: 4342/7580 cut-off events. [2024-06-04 16:16:44,786 INFO L125 PetriNetUnfolderBase]: For 575457/575457 co-relation queries the response was YES. [2024-06-04 16:16:44,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50187 conditions, 7580 events. 4342/7580 cut-off events. For 575457/575457 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55267 event pairs, 1517 based on Foata normal form. 1/7579 useless extension candidates. Maximal degree in co-relation 50063. Up to 6403 conditions per place. [2024-06-04 16:16:44,865 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 155 changer transitions 0/353 dead transitions. [2024-06-04 16:16:44,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 353 transitions, 6064 flow [2024-06-04 16:16:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:16:44,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-04 16:16:44,866 INFO L175 Difference]: Start difference. First operand has 258 places, 321 transitions, 4564 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:16:44,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 353 transitions, 6064 flow [2024-06-04 16:16:46,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 353 transitions, 5813 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:46,070 INFO L231 Difference]: Finished difference. Result has 263 places, 331 transitions, 4865 flow [2024-06-04 16:16:46,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4865, PETRI_PLACES=263, PETRI_TRANSITIONS=331} [2024-06-04 16:16:46,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-04 16:16:46,071 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 331 transitions, 4865 flow [2024-06-04 16:16:46,071 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 16:16:46,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:46,071 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 16:16:46,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:16:46,071 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 16:16:46,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:46,072 INFO L85 PathProgramCache]: Analyzing trace with hash -90607561, now seen corresponding path program 6 times [2024-06-04 16:16:46,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:46,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786625955] [2024-06-04 16:16:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:46,284 INFO 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 16:16:46,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:46,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786625955] [2024-06-04 16:16:46,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786625955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:46,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:46,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:46,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450441093] [2024-06-04 16:16:46,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:46,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:46,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:46,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:46,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:46,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:46,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 331 transitions, 4865 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 16:16:46,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:46,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:47,544 INFO L124 PetriNetUnfolderBase]: 4339/7576 cut-off events. [2024-06-04 16:16:47,544 INFO L125 PetriNetUnfolderBase]: For 588716/588716 co-relation queries the response was YES. [2024-06-04 16:16:47,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50434 conditions, 7576 events. 4339/7576 cut-off events. For 588716/588716 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55362 event pairs, 1517 based on Foata normal form. 1/7576 useless extension candidates. Maximal degree in co-relation 50307. Up to 6922 conditions per place. [2024-06-04 16:16:47,633 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 36 changer transitions 0/349 dead transitions. [2024-06-04 16:16:47,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 349 transitions, 5593 flow [2024-06-04 16:16:47,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:16:47,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:16:47,634 INFO L175 Difference]: Start difference. First operand has 263 places, 331 transitions, 4865 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:16:47,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 349 transitions, 5593 flow [2024-06-04 16:16:48,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 349 transitions, 5397 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 16:16:48,946 INFO L231 Difference]: Finished difference. Result has 268 places, 331 transitions, 4747 flow [2024-06-04 16:16:48,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4747, PETRI_PLACES=268, PETRI_TRANSITIONS=331} [2024-06-04 16:16:48,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-04 16:16:48,947 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 331 transitions, 4747 flow [2024-06-04 16:16:48,947 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 16:16:48,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:48,947 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 16:16:48,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:16:48,948 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 16:16:48,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:48,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1576221545, now seen corresponding path program 1 times [2024-06-04 16:16:48,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:48,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570777460] [2024-06-04 16:16:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:49,143 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 16:16:49,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:49,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570777460] [2024-06-04 16:16:49,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570777460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:49,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:49,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:49,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441790905] [2024-06-04 16:16:49,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:49,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:49,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:49,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:49,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:49,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:49,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 331 transitions, 4747 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 16:16:49,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:49,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:49,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:50,453 INFO L124 PetriNetUnfolderBase]: 4334/7569 cut-off events. [2024-06-04 16:16:50,453 INFO L125 PetriNetUnfolderBase]: For 600685/600685 co-relation queries the response was YES. [2024-06-04 16:16:50,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50019 conditions, 7569 events. 4334/7569 cut-off events. For 600685/600685 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55314 event pairs, 1377 based on Foata normal form. 2/7570 useless extension candidates. Maximal degree in co-relation 49891. Up to 6831 conditions per place. [2024-06-04 16:16:50,539 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 317 selfloop transitions, 41 changer transitions 0/365 dead transitions. [2024-06-04 16:16:50,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 365 transitions, 5734 flow [2024-06-04 16:16:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:16:50,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-04 16:16:50,541 INFO L175 Difference]: Start difference. First operand has 268 places, 331 transitions, 4747 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:16:50,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 365 transitions, 5734 flow [2024-06-04 16:16:52,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 365 transitions, 5654 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:52,027 INFO L231 Difference]: Finished difference. Result has 270 places, 332 transitions, 4779 flow [2024-06-04 16:16:52,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4667, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4779, PETRI_PLACES=270, PETRI_TRANSITIONS=332} [2024-06-04 16:16:52,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-04 16:16:52,028 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 332 transitions, 4779 flow [2024-06-04 16:16:52,028 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 16:16:52,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:52,028 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 16:16:52,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:16:52,029 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 16:16:52,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1567650665, now seen corresponding path program 2 times [2024-06-04 16:16:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:52,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371309237] [2024-06-04 16:16:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:52,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:52,255 INFO 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 16:16:52,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:52,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371309237] [2024-06-04 16:16:52,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371309237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:52,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:52,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:52,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54301288] [2024-06-04 16:16:52,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:52,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:52,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:52,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:52,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:52,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:52,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 332 transitions, 4779 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 16:16:52,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:52,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:52,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:53,570 INFO L124 PetriNetUnfolderBase]: 4342/7579 cut-off events. [2024-06-04 16:16:53,570 INFO L125 PetriNetUnfolderBase]: For 616195/616195 co-relation queries the response was YES. [2024-06-04 16:16:53,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50402 conditions, 7579 events. 4342/7579 cut-off events. For 616195/616195 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55309 event pairs, 1510 based on Foata normal form. 2/7578 useless extension candidates. Maximal degree in co-relation 50273. Up to 6924 conditions per place. [2024-06-04 16:16:53,666 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 316 selfloop transitions, 36 changer transitions 0/359 dead transitions. [2024-06-04 16:16:53,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 359 transitions, 5595 flow [2024-06-04 16:16:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:53,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:53,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:16:53,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:16:53,668 INFO L175 Difference]: Start difference. First operand has 270 places, 332 transitions, 4779 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:16:53,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 359 transitions, 5595 flow [2024-06-04 16:16:55,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 359 transitions, 5415 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:55,258 INFO L231 Difference]: Finished difference. Result has 270 places, 334 transitions, 4730 flow [2024-06-04 16:16:55,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4608, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4730, PETRI_PLACES=270, PETRI_TRANSITIONS=334} [2024-06-04 16:16:55,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-04 16:16:55,259 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 334 transitions, 4730 flow [2024-06-04 16:16:55,259 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 16:16:55,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:55,259 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 16:16:55,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:16:55,259 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 16:16:55,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:55,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1620634695, now seen corresponding path program 3 times [2024-06-04 16:16:55,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:55,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815861765] [2024-06-04 16:16:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:55,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:55,457 INFO 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 16:16:55,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:55,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815861765] [2024-06-04 16:16:55,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815861765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:55,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:55,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:55,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085423867] [2024-06-04 16:16:55,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:55,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:55,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:55,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:55,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:55,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:55,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 334 transitions, 4730 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 16:16:55,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:55,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:56,704 INFO L124 PetriNetUnfolderBase]: 4337/7572 cut-off events. [2024-06-04 16:16:56,704 INFO L125 PetriNetUnfolderBase]: For 624488/624488 co-relation queries the response was YES. [2024-06-04 16:16:56,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49992 conditions, 7572 events. 4337/7572 cut-off events. For 624488/624488 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55224 event pairs, 1511 based on Foata normal form. 2/7573 useless extension candidates. Maximal degree in co-relation 49864. Up to 6917 conditions per place. [2024-06-04 16:16:56,796 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 311 selfloop transitions, 35 changer transitions 0/353 dead transitions. [2024-06-04 16:16:56,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 353 transitions, 5468 flow [2024-06-04 16:16:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:16:56,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:16:56,797 INFO L175 Difference]: Start difference. First operand has 270 places, 334 transitions, 4730 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:16:56,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 353 transitions, 5468 flow [2024-06-04 16:16:58,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 353 transitions, 5353 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:58,135 INFO L231 Difference]: Finished difference. Result has 272 places, 334 transitions, 4690 flow [2024-06-04 16:16:58,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4615, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4690, PETRI_PLACES=272, PETRI_TRANSITIONS=334} [2024-06-04 16:16:58,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-04 16:16:58,136 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 334 transitions, 4690 flow [2024-06-04 16:16:58,136 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 16:16:58,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:58,136 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 16:16:58,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:16:58,136 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 16:16:58,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:58,137 INFO L85 PathProgramCache]: Analyzing trace with hash -885320166, now seen corresponding path program 1 times [2024-06-04 16:16:58,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:58,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509323736] [2024-06-04 16:16:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:58,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:58,312 INFO 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 16:16:58,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:58,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509323736] [2024-06-04 16:16:58,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509323736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:58,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:58,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:58,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924372966] [2024-06-04 16:16:58,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:58,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:58,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:58,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:58,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:58,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:58,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 334 transitions, 4690 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:58,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:58,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:58,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:59,602 INFO L124 PetriNetUnfolderBase]: 4334/7568 cut-off events. [2024-06-04 16:16:59,602 INFO L125 PetriNetUnfolderBase]: For 634065/634065 co-relation queries the response was YES. [2024-06-04 16:16:59,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49992 conditions, 7568 events. 4334/7568 cut-off events. For 634065/634065 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55195 event pairs, 1510 based on Foata normal form. 1/7568 useless extension candidates. Maximal degree in co-relation 49863. Up to 6738 conditions per place. [2024-06-04 16:16:59,698 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 97 changer transitions 0/365 dead transitions. [2024-06-04 16:16:59,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 365 transitions, 5484 flow [2024-06-04 16:16:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-04 16:16:59,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:16:59,699 INFO L175 Difference]: Start difference. First operand has 272 places, 334 transitions, 4690 flow. Second operand 9 states and 216 transitions. [2024-06-04 16:16:59,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 365 transitions, 5484 flow [2024-06-04 16:17:01,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 365 transitions, 5399 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:01,486 INFO L231 Difference]: Finished difference. Result has 275 places, 334 transitions, 4811 flow [2024-06-04 16:17:01,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4811, PETRI_PLACES=275, PETRI_TRANSITIONS=334} [2024-06-04 16:17:01,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-04 16:17:01,486 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 334 transitions, 4811 flow [2024-06-04 16:17:01,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:01,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:01,487 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 16:17:01,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:17:01,487 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 16:17:01,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash 432064567, now seen corresponding path program 7 times [2024-06-04 16:17:01,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:01,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927836891] [2024-06-04 16:17:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:01,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:01,670 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 16:17:01,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:01,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927836891] [2024-06-04 16:17:01,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927836891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:01,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:01,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:01,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253617832] [2024-06-04 16:17:01,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:01,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:01,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:01,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:01,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:01,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:01,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 334 transitions, 4811 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 16:17:01,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:01,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:01,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:02,921 INFO L124 PetriNetUnfolderBase]: 4344/7586 cut-off events. [2024-06-04 16:17:02,922 INFO L125 PetriNetUnfolderBase]: For 653518/653518 co-relation queries the response was YES. [2024-06-04 16:17:02,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50533 conditions, 7586 events. 4344/7586 cut-off events. For 653518/653518 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55435 event pairs, 1456 based on Foata normal form. 2/7587 useless extension candidates. Maximal degree in co-relation 50403. Up to 6404 conditions per place. [2024-06-04 16:17:03,019 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 234 selfloop transitions, 130 changer transitions 0/371 dead transitions. [2024-06-04 16:17:03,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 371 transitions, 5997 flow [2024-06-04 16:17:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-04 16:17:03,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-04 16:17:03,021 INFO L175 Difference]: Start difference. First operand has 275 places, 334 transitions, 4811 flow. Second operand 9 states and 224 transitions. [2024-06-04 16:17:03,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 371 transitions, 5997 flow [2024-06-04 16:17:04,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 371 transitions, 5731 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 16:17:04,622 INFO L231 Difference]: Finished difference. Result has 274 places, 338 transitions, 4881 flow [2024-06-04 16:17:04,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4881, PETRI_PLACES=274, PETRI_TRANSITIONS=338} [2024-06-04 16:17:04,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-04 16:17:04,623 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 338 transitions, 4881 flow [2024-06-04 16:17:04,623 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 16:17:04,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:04,623 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 16:17:04,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:17:04,624 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 16:17:04,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:04,624 INFO L85 PathProgramCache]: Analyzing trace with hash -196369527, now seen corresponding path program 8 times [2024-06-04 16:17:04,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:04,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069752934] [2024-06-04 16:17:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:04,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:04,829 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 16:17:04,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:04,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069752934] [2024-06-04 16:17:04,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069752934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:04,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:04,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:04,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980565710] [2024-06-04 16:17:04,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:04,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:04,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:04,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:04,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:04,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 338 transitions, 4881 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 16:17:04,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:04,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:04,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:06,216 INFO L124 PetriNetUnfolderBase]: 4338/7578 cut-off events. [2024-06-04 16:17:06,216 INFO L125 PetriNetUnfolderBase]: For 648482/648482 co-relation queries the response was YES. [2024-06-04 16:17:06,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50450 conditions, 7578 events. 4338/7578 cut-off events. For 648482/648482 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55275 event pairs, 1456 based on Foata normal form. 2/7579 useless extension candidates. Maximal degree in co-relation 50320. Up to 6401 conditions per place. [2024-06-04 16:17:06,303 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 232 selfloop transitions, 129 changer transitions 0/368 dead transitions. [2024-06-04 16:17:06,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 368 transitions, 5993 flow [2024-06-04 16:17:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 16:17:06,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-04 16:17:06,305 INFO L175 Difference]: Start difference. First operand has 274 places, 338 transitions, 4881 flow. Second operand 9 states and 221 transitions. [2024-06-04 16:17:06,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 368 transitions, 5993 flow [2024-06-04 16:17:08,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 368 transitions, 5747 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:08,073 INFO L231 Difference]: Finished difference. Result has 277 places, 338 transitions, 4900 flow [2024-06-04 16:17:08,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4900, PETRI_PLACES=277, PETRI_TRANSITIONS=338} [2024-06-04 16:17:08,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-04 16:17:08,074 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 338 transitions, 4900 flow [2024-06-04 16:17:08,074 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 16:17:08,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:08,074 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 16:17:08,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:17:08,075 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 16:17:08,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash -545028041, now seen corresponding path program 9 times [2024-06-04 16:17:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:08,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175633038] [2024-06-04 16:17:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:08,260 INFO 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 16:17:08,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:08,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175633038] [2024-06-04 16:17:08,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175633038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:08,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:08,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258507771] [2024-06-04 16:17:08,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:08,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:08,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:08,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:08,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 338 transitions, 4900 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 16:17:08,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:08,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:08,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:09,523 INFO L124 PetriNetUnfolderBase]: 4350/7601 cut-off events. [2024-06-04 16:17:09,524 INFO L125 PetriNetUnfolderBase]: For 667515/667515 co-relation queries the response was YES. [2024-06-04 16:17:09,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50733 conditions, 7601 events. 4350/7601 cut-off events. For 667515/667515 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55605 event pairs, 1487 based on Foata normal form. 4/7604 useless extension candidates. Maximal degree in co-relation 50602. Up to 6408 conditions per place. [2024-06-04 16:17:09,615 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 141 changer transitions 0/373 dead transitions. [2024-06-04 16:17:09,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 373 transitions, 6146 flow [2024-06-04 16:17:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-04 16:17:09,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-04 16:17:09,617 INFO L175 Difference]: Start difference. First operand has 277 places, 338 transitions, 4900 flow. Second operand 10 states and 238 transitions. [2024-06-04 16:17:09,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 373 transitions, 6146 flow [2024-06-04 16:17:11,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 373 transitions, 5876 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:11,241 INFO L231 Difference]: Finished difference. Result has 281 places, 345 transitions, 5099 flow [2024-06-04 16:17:11,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4637, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5099, PETRI_PLACES=281, PETRI_TRANSITIONS=345} [2024-06-04 16:17:11,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-04 16:17:11,242 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 345 transitions, 5099 flow [2024-06-04 16:17:11,242 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 16:17:11,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:11,242 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 16:17:11,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:17:11,242 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 16:17:11,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:11,243 INFO L85 PathProgramCache]: Analyzing trace with hash -861117415, now seen corresponding path program 10 times [2024-06-04 16:17:11,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:11,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795977981] [2024-06-04 16:17:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:11,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:11,422 INFO 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 16:17:11,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:11,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795977981] [2024-06-04 16:17:11,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795977981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:11,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:11,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:11,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914586075] [2024-06-04 16:17:11,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:11,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:11,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:11,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:11,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:11,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:11,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 345 transitions, 5099 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 16:17:11,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:11,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:12,737 INFO L124 PetriNetUnfolderBase]: 4305/7514 cut-off events. [2024-06-04 16:17:12,737 INFO L125 PetriNetUnfolderBase]: For 670038/670038 co-relation queries the response was YES. [2024-06-04 16:17:12,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50515 conditions, 7514 events. 4305/7514 cut-off events. For 670038/670038 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 54685 event pairs, 1481 based on Foata normal form. 2/7514 useless extension candidates. Maximal degree in co-relation 50382. Up to 6331 conditions per place. [2024-06-04 16:17:12,826 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 158 changer transitions 1/368 dead transitions. [2024-06-04 16:17:12,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 368 transitions, 6523 flow [2024-06-04 16:17:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:17:12,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-04 16:17:12,828 INFO L175 Difference]: Start difference. First operand has 281 places, 345 transitions, 5099 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:17:12,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 368 transitions, 6523 flow [2024-06-04 16:17:14,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 368 transitions, 6351 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:14,787 INFO L231 Difference]: Finished difference. Result has 284 places, 344 transitions, 5234 flow [2024-06-04 16:17:14,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5234, PETRI_PLACES=284, PETRI_TRANSITIONS=344} [2024-06-04 16:17:14,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-04 16:17:14,788 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 344 transitions, 5234 flow [2024-06-04 16:17:14,788 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 16:17:14,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:14,788 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 16:17:14,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:17:14,788 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 16:17:14,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:14,789 INFO L85 PathProgramCache]: Analyzing trace with hash 44193847, now seen corresponding path program 11 times [2024-06-04 16:17:14,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:14,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17499995] [2024-06-04 16:17:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:14,976 INFO 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 16:17:14,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:14,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17499995] [2024-06-04 16:17:14,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17499995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:14,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:14,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:14,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083954885] [2024-06-04 16:17:14,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:14,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:14,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:14,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:14,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:15,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:15,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 344 transitions, 5234 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 16:17:15,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:15,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:15,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:16,244 INFO L124 PetriNetUnfolderBase]: 4250/7415 cut-off events. [2024-06-04 16:17:16,244 INFO L125 PetriNetUnfolderBase]: For 680118/680118 co-relation queries the response was YES. [2024-06-04 16:17:16,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50145 conditions, 7415 events. 4250/7415 cut-off events. For 680118/680118 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 53802 event pairs, 1460 based on Foata normal form. 2/7416 useless extension candidates. Maximal degree in co-relation 50011. Up to 6756 conditions per place. [2024-06-04 16:17:16,336 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 320 selfloop transitions, 35 changer transitions 1/363 dead transitions. [2024-06-04 16:17:16,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 363 transitions, 5992 flow [2024-06-04 16:17:16,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-04 16:17:16,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:17:16,337 INFO L175 Difference]: Start difference. First operand has 284 places, 344 transitions, 5234 flow. Second operand 9 states and 198 transitions. [2024-06-04 16:17:16,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 363 transitions, 5992 flow [2024-06-04 16:17:18,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 363 transitions, 5457 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-04 16:17:18,043 INFO L231 Difference]: Finished difference. Result has 282 places, 343 transitions, 4759 flow [2024-06-04 16:17:18,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4759, PETRI_PLACES=282, PETRI_TRANSITIONS=343} [2024-06-04 16:17:18,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-04 16:17:18,044 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 343 transitions, 4759 flow [2024-06-04 16:17:18,044 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 16:17:18,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:18,044 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] [2024-06-04 16:17:18,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:17:18,044 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 16:17:18,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:18,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1381618293, now seen corresponding path program 12 times [2024-06-04 16:17:18,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:18,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879417903] [2024-06-04 16:17:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:18,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:18,226 INFO 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 16:17:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879417903] [2024-06-04 16:17:18,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879417903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:18,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:18,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083893436] [2024-06-04 16:17:18,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:18,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:18,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:18,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 343 transitions, 4759 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 16:17:18,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:18,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:18,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:19,403 INFO L124 PetriNetUnfolderBase]: 4195/7316 cut-off events. [2024-06-04 16:17:19,403 INFO L125 PetriNetUnfolderBase]: For 683124/683124 co-relation queries the response was YES. [2024-06-04 16:17:19,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48975 conditions, 7316 events. 4195/7316 cut-off events. For 683124/683124 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52914 event pairs, 1447 based on Foata normal form. 2/7316 useless extension candidates. Maximal degree in co-relation 48842. Up to 6149 conditions per place. [2024-06-04 16:17:19,493 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 204 selfloop transitions, 154 changer transitions 1/366 dead transitions. [2024-06-04 16:17:19,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 366 transitions, 6029 flow [2024-06-04 16:17:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:19,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-04 16:17:19,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-04 16:17:19,494 INFO L175 Difference]: Start difference. First operand has 282 places, 343 transitions, 4759 flow. Second operand 10 states and 232 transitions. [2024-06-04 16:17:19,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 366 transitions, 6029 flow [2024-06-04 16:17:20,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 366 transitions, 5872 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-04 16:17:20,914 INFO L231 Difference]: Finished difference. Result has 281 places, 342 transitions, 4904 flow [2024-06-04 16:17:20,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4904, PETRI_PLACES=281, PETRI_TRANSITIONS=342} [2024-06-04 16:17:20,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-04 16:17:20,915 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 342 transitions, 4904 flow [2024-06-04 16:17:20,915 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 16:17:20,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:20,916 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 16:17:20,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:17:20,916 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 16:17:20,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:20,917 INFO L85 PathProgramCache]: Analyzing trace with hash 281083762, now seen corresponding path program 1 times [2024-06-04 16:17:20,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:20,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915403235] [2024-06-04 16:17:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:20,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:21,174 INFO 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 16:17:21,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:21,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915403235] [2024-06-04 16:17:21,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915403235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:21,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:21,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:21,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425650308] [2024-06-04 16:17:21,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:21,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:21,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:21,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:21,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:21,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 342 transitions, 4904 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:21,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:21,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:21,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:22,676 INFO L124 PetriNetUnfolderBase]: 4557/7933 cut-off events. [2024-06-04 16:17:22,676 INFO L125 PetriNetUnfolderBase]: For 884588/884588 co-relation queries the response was YES. [2024-06-04 16:17:22,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56363 conditions, 7933 events. 4557/7933 cut-off events. For 884588/884588 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 58273 event pairs, 1376 based on Foata normal form. 12/7944 useless extension candidates. Maximal degree in co-relation 56229. Up to 6415 conditions per place. [2024-06-04 16:17:22,756 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 329 selfloop transitions, 54 changer transitions 0/390 dead transitions. [2024-06-04 16:17:22,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 390 transitions, 6412 flow [2024-06-04 16:17:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:17:22,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:17:22,759 INFO L175 Difference]: Start difference. First operand has 281 places, 342 transitions, 4904 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:17:22,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 390 transitions, 6412 flow [2024-06-04 16:17:24,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 390 transitions, 5718 flow, removed 5 selfloop flow, removed 15 redundant places. [2024-06-04 16:17:24,695 INFO L231 Difference]: Finished difference. Result has 276 places, 351 transitions, 4540 flow [2024-06-04 16:17:24,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4210, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4540, PETRI_PLACES=276, PETRI_TRANSITIONS=351} [2024-06-04 16:17:24,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-04 16:17:24,696 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 351 transitions, 4540 flow [2024-06-04 16:17:24,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:24,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:24,697 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 16:17:24,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:17:24,697 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 16:17:24,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:24,697 INFO L85 PathProgramCache]: Analyzing trace with hash 184501814, now seen corresponding path program 2 times [2024-06-04 16:17:24,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:24,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592122124] [2024-06-04 16:17:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:24,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:24,899 INFO 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 16:17:24,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:24,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592122124] [2024-06-04 16:17:24,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592122124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:24,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:24,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:24,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166521766] [2024-06-04 16:17:24,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:24,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:24,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:24,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:24,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:24,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 351 transitions, 4540 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:24,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:24,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:24,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:26,333 INFO L124 PetriNetUnfolderBase]: 4677/8138 cut-off events. [2024-06-04 16:17:26,334 INFO L125 PetriNetUnfolderBase]: For 958446/958446 co-relation queries the response was YES. [2024-06-04 16:17:26,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58647 conditions, 8138 events. 4677/8138 cut-off events. For 958446/958446 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 59918 event pairs, 1569 based on Foata normal form. 18/8155 useless extension candidates. Maximal degree in co-relation 58511. Up to 6913 conditions per place. [2024-06-04 16:17:26,442 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 98 changer transitions 0/392 dead transitions. [2024-06-04 16:17:26,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 392 transitions, 5782 flow [2024-06-04 16:17:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-04 16:17:26,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-04 16:17:26,444 INFO L175 Difference]: Start difference. First operand has 276 places, 351 transitions, 4540 flow. Second operand 10 states and 237 transitions. [2024-06-04 16:17:26,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 392 transitions, 5782 flow [2024-06-04 16:17:28,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 392 transitions, 5681 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-04 16:17:28,530 INFO L231 Difference]: Finished difference. Result has 284 places, 358 transitions, 4874 flow [2024-06-04 16:17:28,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4874, PETRI_PLACES=284, PETRI_TRANSITIONS=358} [2024-06-04 16:17:28,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-04 16:17:28,531 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 358 transitions, 4874 flow [2024-06-04 16:17:28,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:28,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:28,531 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 16:17:28,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:17:28,531 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 16:17:28,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash -536439212, now seen corresponding path program 3 times [2024-06-04 16:17:28,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:28,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3267913] [2024-06-04 16:17:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:28,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:28,722 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 16:17:28,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:28,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3267913] [2024-06-04 16:17:28,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3267913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:28,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:28,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:28,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864805684] [2024-06-04 16:17:28,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:28,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:28,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:28,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:28,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:28,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 358 transitions, 4874 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:28,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:28,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:28,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:30,173 INFO L124 PetriNetUnfolderBase]: 4737/8201 cut-off events. [2024-06-04 16:17:30,174 INFO L125 PetriNetUnfolderBase]: For 989747/989747 co-relation queries the response was YES. [2024-06-04 16:17:30,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59721 conditions, 8201 events. 4737/8201 cut-off events. For 989747/989747 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 60159 event pairs, 1358 based on Foata normal form. 18/8218 useless extension candidates. Maximal degree in co-relation 59582. Up to 6731 conditions per place. [2024-06-04 16:17:30,282 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 112 changer transitions 2/404 dead transitions. [2024-06-04 16:17:30,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 404 transitions, 6007 flow [2024-06-04 16:17:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-04 16:17:30,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:17:30,283 INFO L175 Difference]: Start difference. First operand has 284 places, 358 transitions, 4874 flow. Second operand 10 states and 245 transitions. [2024-06-04 16:17:30,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 404 transitions, 6007 flow [2024-06-04 16:17:32,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 404 transitions, 5795 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:32,353 INFO L231 Difference]: Finished difference. Result has 288 places, 359 transitions, 4922 flow [2024-06-04 16:17:32,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4922, PETRI_PLACES=288, PETRI_TRANSITIONS=359} [2024-06-04 16:17:32,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-04 16:17:32,354 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 359 transitions, 4922 flow [2024-06-04 16:17:32,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:32,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:32,354 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 16:17:32,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:17:32,355 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 16:17:32,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1165023966, now seen corresponding path program 4 times [2024-06-04 16:17:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327694630] [2024-06-04 16:17:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:32,540 INFO 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 16:17:32,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:32,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327694630] [2024-06-04 16:17:32,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327694630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:32,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:32,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:32,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476362769] [2024-06-04 16:17:32,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:32,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:32,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:32,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:32,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:32,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:32,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 359 transitions, 4922 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:32,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:32,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:32,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:34,092 INFO L124 PetriNetUnfolderBase]: 4797/8308 cut-off events. [2024-06-04 16:17:34,093 INFO L125 PetriNetUnfolderBase]: For 1031963/1031963 co-relation queries the response was YES. [2024-06-04 16:17:34,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60446 conditions, 8308 events. 4797/8308 cut-off events. For 1031963/1031963 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 61179 event pairs, 1605 based on Foata normal form. 24/8331 useless extension candidates. Maximal degree in co-relation 60305. Up to 7334 conditions per place. [2024-06-04 16:17:34,185 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 98 changer transitions 2/398 dead transitions. [2024-06-04 16:17:34,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 398 transitions, 5855 flow [2024-06-04 16:17:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-04 16:17:34,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-04 16:17:34,187 INFO L175 Difference]: Start difference. First operand has 288 places, 359 transitions, 4922 flow. Second operand 10 states and 237 transitions. [2024-06-04 16:17:34,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 398 transitions, 5855 flow [2024-06-04 16:17:36,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 398 transitions, 5653 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:36,625 INFO L231 Difference]: Finished difference. Result has 291 places, 360 transitions, 4952 flow [2024-06-04 16:17:36,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4952, PETRI_PLACES=291, PETRI_TRANSITIONS=360} [2024-06-04 16:17:36,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-04 16:17:36,626 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 360 transitions, 4952 flow [2024-06-04 16:17:36,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:36,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:36,627 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 16:17:36,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:17:36,627 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 16:17:36,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:36,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1979178926, now seen corresponding path program 5 times [2024-06-04 16:17:36,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:36,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139122135] [2024-06-04 16:17:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:36,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:36,850 INFO 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 16:17:36,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:36,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139122135] [2024-06-04 16:17:36,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139122135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:36,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:36,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:36,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667873716] [2024-06-04 16:17:36,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:36,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:36,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:36,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:36,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 360 transitions, 4952 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:36,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:36,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:36,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:38,311 INFO L124 PetriNetUnfolderBase]: 4746/8221 cut-off events. [2024-06-04 16:17:38,312 INFO L125 PetriNetUnfolderBase]: For 992416/992416 co-relation queries the response was YES. [2024-06-04 16:17:38,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58745 conditions, 8221 events. 4746/8221 cut-off events. For 992416/992416 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 60398 event pairs, 1581 based on Foata normal form. 24/8244 useless extension candidates. Maximal degree in co-relation 58603. Up to 7260 conditions per place. [2024-06-04 16:17:38,419 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 90 changer transitions 1/391 dead transitions. [2024-06-04 16:17:38,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 391 transitions, 5838 flow [2024-06-04 16:17:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 16:17:38,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-04 16:17:38,420 INFO L175 Difference]: Start difference. First operand has 291 places, 360 transitions, 4952 flow. Second operand 9 states and 212 transitions. [2024-06-04 16:17:38,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 391 transitions, 5838 flow [2024-06-04 16:17:40,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 391 transitions, 5636 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:40,834 INFO L231 Difference]: Finished difference. Result has 292 places, 361 transitions, 4960 flow [2024-06-04 16:17:40,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4750, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4960, PETRI_PLACES=292, PETRI_TRANSITIONS=361} [2024-06-04 16:17:40,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-04 16:17:40,834 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 361 transitions, 4960 flow [2024-06-04 16:17:40,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:40,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:40,835 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 16:17:40,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:17:40,835 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 16:17:40,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash -530713760, now seen corresponding path program 1 times [2024-06-04 16:17:40,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:40,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675341826] [2024-06-04 16:17:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:40,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:41,057 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 16:17:41,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:41,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675341826] [2024-06-04 16:17:41,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675341826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:41,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:41,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:41,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925010366] [2024-06-04 16:17:41,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:41,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:41,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:41,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:41,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:41,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:41,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 361 transitions, 4960 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:41,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:41,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:41,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:42,458 INFO L124 PetriNetUnfolderBase]: 4729/8222 cut-off events. [2024-06-04 16:17:42,458 INFO L125 PetriNetUnfolderBase]: For 965439/965439 co-relation queries the response was YES. [2024-06-04 16:17:42,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58349 conditions, 8222 events. 4729/8222 cut-off events. For 965439/965439 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 60556 event pairs, 1566 based on Foata normal form. 18/8239 useless extension candidates. Maximal degree in co-relation 58206. Up to 6965 conditions per place. [2024-06-04 16:17:42,571 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 290 selfloop transitions, 99 changer transitions 0/396 dead transitions. [2024-06-04 16:17:42,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 396 transitions, 5911 flow [2024-06-04 16:17:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:17:42,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-04 16:17:42,572 INFO L175 Difference]: Start difference. First operand has 292 places, 361 transitions, 4960 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:17:42,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 396 transitions, 5911 flow [2024-06-04 16:17:45,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 396 transitions, 5721 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:45,307 INFO L231 Difference]: Finished difference. Result has 294 places, 364 transitions, 5060 flow [2024-06-04 16:17:45,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5060, PETRI_PLACES=294, PETRI_TRANSITIONS=364} [2024-06-04 16:17:45,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-04 16:17:45,308 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 364 transitions, 5060 flow [2024-06-04 16:17:45,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:45,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:45,308 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 16:17:45,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:17:45,308 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 16:17:45,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash -260727934, now seen corresponding path program 6 times [2024-06-04 16:17:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:45,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741880555] [2024-06-04 16:17:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:45,511 INFO 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 16:17:45,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:45,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741880555] [2024-06-04 16:17:45,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741880555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:45,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:45,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:45,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031496524] [2024-06-04 16:17:45,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:45,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:45,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:45,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 364 transitions, 5060 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:45,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:45,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:45,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:47,202 INFO L124 PetriNetUnfolderBase]: 4661/8066 cut-off events. [2024-06-04 16:17:47,203 INFO L125 PetriNetUnfolderBase]: For 913563/913563 co-relation queries the response was YES. [2024-06-04 16:17:47,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56716 conditions, 8066 events. 4661/8066 cut-off events. For 913563/913563 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 58892 event pairs, 1536 based on Foata normal form. 16/8080 useless extension candidates. Maximal degree in co-relation 56572. Up to 7161 conditions per place. [2024-06-04 16:17:47,294 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 292 selfloop transitions, 85 changer transitions 2/386 dead transitions. [2024-06-04 16:17:47,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 386 transitions, 5882 flow [2024-06-04 16:17:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:17:47,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-04 16:17:47,295 INFO L175 Difference]: Start difference. First operand has 294 places, 364 transitions, 5060 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:17:47,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 386 transitions, 5882 flow [2024-06-04 16:17:49,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 386 transitions, 5623 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:49,835 INFO L231 Difference]: Finished difference. Result has 295 places, 362 transitions, 4948 flow [2024-06-04 16:17:49,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4801, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4948, PETRI_PLACES=295, PETRI_TRANSITIONS=362} [2024-06-04 16:17:49,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-04 16:17:49,836 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 362 transitions, 4948 flow [2024-06-04 16:17:49,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:49,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:49,836 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 16:17:49,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:17:49,836 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 16:17:49,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash -4012222, now seen corresponding path program 2 times [2024-06-04 16:17:49,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:49,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096743270] [2024-06-04 16:17:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:49,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:50,047 INFO 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 16:17:50,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:50,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096743270] [2024-06-04 16:17:50,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096743270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:50,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:50,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:50,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138705163] [2024-06-04 16:17:50,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:50,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:50,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:50,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:50,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:50,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:50,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 362 transitions, 4948 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:50,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:50,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:50,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:51,459 INFO L124 PetriNetUnfolderBase]: 4589/7950 cut-off events. [2024-06-04 16:17:51,459 INFO L125 PetriNetUnfolderBase]: For 914215/914215 co-relation queries the response was YES. [2024-06-04 16:17:51,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56119 conditions, 7950 events. 4589/7950 cut-off events. For 914215/914215 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 57965 event pairs, 1482 based on Foata normal form. 12/7960 useless extension candidates. Maximal degree in co-relation 55974. Up to 6989 conditions per place. [2024-06-04 16:17:51,575 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 89 changer transitions 0/389 dead transitions. [2024-06-04 16:17:51,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 389 transitions, 5846 flow [2024-06-04 16:17:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:17:51,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:17:51,577 INFO L175 Difference]: Start difference. First operand has 295 places, 362 transitions, 4948 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:17:51,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 389 transitions, 5846 flow [2024-06-04 16:17:53,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 389 transitions, 5593 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:53,956 INFO L231 Difference]: Finished difference. Result has 295 places, 364 transitions, 4940 flow [2024-06-04 16:17:53,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4695, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4940, PETRI_PLACES=295, PETRI_TRANSITIONS=364} [2024-06-04 16:17:53,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-04 16:17:53,957 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 364 transitions, 4940 flow [2024-06-04 16:17:53,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:53,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:53,957 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] [2024-06-04 16:17:53,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:17:53,957 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 16:17:53,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:53,958 INFO L85 PathProgramCache]: Analyzing trace with hash 5184548, now seen corresponding path program 3 times [2024-06-04 16:17:53,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:53,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240196348] [2024-06-04 16:17:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:53,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:54,163 INFO 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 16:17:54,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:54,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240196348] [2024-06-04 16:17:54,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240196348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:54,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:54,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:54,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155652883] [2024-06-04 16:17:54,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:54,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:54,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:54,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:54,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:54,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:54,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 364 transitions, 4940 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:54,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:54,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:54,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:55,549 INFO L124 PetriNetUnfolderBase]: 4596/7959 cut-off events. [2024-06-04 16:17:55,550 INFO L125 PetriNetUnfolderBase]: For 906945/906945 co-relation queries the response was YES. [2024-06-04 16:17:55,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55716 conditions, 7959 events. 4596/7959 cut-off events. For 906945/906945 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 57997 event pairs, 1471 based on Foata normal form. 12/7969 useless extension candidates. Maximal degree in co-relation 55570. Up to 6550 conditions per place. [2024-06-04 16:17:55,658 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 108 changer transitions 0/391 dead transitions. [2024-06-04 16:17:55,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 391 transitions, 5814 flow [2024-06-04 16:17:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:17:55,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:17:55,660 INFO L175 Difference]: Start difference. First operand has 295 places, 364 transitions, 4940 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:17:55,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 391 transitions, 5814 flow [2024-06-04 16:17:57,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 391 transitions, 5589 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:57,982 INFO L231 Difference]: Finished difference. Result has 297 places, 365 transitions, 4966 flow [2024-06-04 16:17:57,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4966, PETRI_PLACES=297, PETRI_TRANSITIONS=365} [2024-06-04 16:17:57,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-04 16:17:57,983 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 365 transitions, 4966 flow [2024-06-04 16:17:57,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:57,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:57,983 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 16:17:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:17:57,983 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 16:17:57,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2118986272, now seen corresponding path program 1 times [2024-06-04 16:17:57,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:57,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286480589] [2024-06-04 16:17:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:57,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:58,164 INFO 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 16:17:58,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:58,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286480589] [2024-06-04 16:17:58,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286480589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:58,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:58,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:58,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344028226] [2024-06-04 16:17:58,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:58,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:58,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:58,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:58,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 365 transitions, 4966 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:58,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:58,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:58,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:59,755 INFO L124 PetriNetUnfolderBase]: 4622/8005 cut-off events. [2024-06-04 16:17:59,755 INFO L125 PetriNetUnfolderBase]: For 888921/888921 co-relation queries the response was YES. [2024-06-04 16:17:59,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56361 conditions, 8005 events. 4622/8005 cut-off events. For 888921/888921 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58293 event pairs, 1482 based on Foata normal form. 2/8006 useless extension candidates. Maximal degree in co-relation 56214. Up to 7053 conditions per place. [2024-06-04 16:17:59,848 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 274 selfloop transitions, 115 changer transitions 0/396 dead transitions. [2024-06-04 16:17:59,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 396 transitions, 6130 flow [2024-06-04 16:17:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:17:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:17:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:17:59,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:17:59,849 INFO L175 Difference]: Start difference. First operand has 297 places, 365 transitions, 4966 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:17:59,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 396 transitions, 6130 flow [2024-06-04 16:18:02,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 396 transitions, 5786 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-04 16:18:02,487 INFO L231 Difference]: Finished difference. Result has 297 places, 374 transitions, 5099 flow [2024-06-04 16:18:02,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4622, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5099, PETRI_PLACES=297, PETRI_TRANSITIONS=374} [2024-06-04 16:18:02,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-04 16:18:02,487 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 374 transitions, 5099 flow [2024-06-04 16:18:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:02,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:02,488 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 16:18:02,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:18:02,488 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 16:18:02,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:02,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2114338132, now seen corresponding path program 2 times [2024-06-04 16:18:02,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:02,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842851387] [2024-06-04 16:18:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:02,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:02,671 INFO 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 16:18:02,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:02,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842851387] [2024-06-04 16:18:02,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842851387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:02,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:02,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:02,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208287833] [2024-06-04 16:18:02,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:02,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:02,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:02,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:02,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:02,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:02,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 374 transitions, 5099 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:02,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:02,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:02,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:04,189 INFO L124 PetriNetUnfolderBase]: 4627/8010 cut-off events. [2024-06-04 16:18:04,189 INFO L125 PetriNetUnfolderBase]: For 899390/899390 co-relation queries the response was YES. [2024-06-04 16:18:04,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56122 conditions, 8010 events. 4627/8010 cut-off events. For 899390/899390 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58481 event pairs, 1481 based on Foata normal form. 1/8010 useless extension candidates. Maximal degree in co-relation 55975. Up to 7057 conditions per place. [2024-06-04 16:18:04,306 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 147 changer transitions 0/404 dead transitions. [2024-06-04 16:18:04,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 404 transitions, 6399 flow [2024-06-04 16:18:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:18:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:18:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-04 16:18:04,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432900432900433 [2024-06-04 16:18:04,309 INFO L175 Difference]: Start difference. First operand has 297 places, 374 transitions, 5099 flow. Second operand 11 states and 251 transitions. [2024-06-04 16:18:04,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 404 transitions, 6399 flow [2024-06-04 16:18:07,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 404 transitions, 6221 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 16:18:07,366 INFO L231 Difference]: Finished difference. Result has 303 places, 378 transitions, 5300 flow [2024-06-04 16:18:07,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5300, PETRI_PLACES=303, PETRI_TRANSITIONS=378} [2024-06-04 16:18:07,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-04 16:18:07,367 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 378 transitions, 5300 flow [2024-06-04 16:18:07,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:07,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:07,368 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 16:18:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:18:07,368 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 16:18:07,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:07,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1941854752, now seen corresponding path program 3 times [2024-06-04 16:18:07,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:07,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696304599] [2024-06-04 16:18:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:07,573 INFO 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 16:18:07,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:07,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696304599] [2024-06-04 16:18:07,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696304599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:07,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:07,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:07,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016002831] [2024-06-04 16:18:07,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:07,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:07,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:07,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:07,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 378 transitions, 5300 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:07,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:07,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:07,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:08,993 INFO L124 PetriNetUnfolderBase]: 4624/8006 cut-off events. [2024-06-04 16:18:08,993 INFO L125 PetriNetUnfolderBase]: For 895563/895563 co-relation queries the response was YES. [2024-06-04 16:18:09,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56098 conditions, 8006 events. 4624/8006 cut-off events. For 895563/895563 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58314 event pairs, 1481 based on Foata normal form. 1/8006 useless extension candidates. Maximal degree in co-relation 55951. Up to 7055 conditions per place. [2024-06-04 16:18:09,104 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 261 selfloop transitions, 134 changer transitions 0/402 dead transitions. [2024-06-04 16:18:09,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 402 transitions, 6336 flow [2024-06-04 16:18:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:18:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:18:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-04 16:18:09,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-04 16:18:09,106 INFO L175 Difference]: Start difference. First operand has 303 places, 378 transitions, 5300 flow. Second operand 10 states and 231 transitions. [2024-06-04 16:18:09,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 402 transitions, 6336 flow [2024-06-04 16:18:11,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 402 transitions, 6187 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:11,516 INFO L231 Difference]: Finished difference. Result has 306 places, 378 transitions, 5440 flow [2024-06-04 16:18:11,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5153, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5440, PETRI_PLACES=306, PETRI_TRANSITIONS=378} [2024-06-04 16:18:11,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-04 16:18:11,517 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 378 transitions, 5440 flow [2024-06-04 16:18:11,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:11,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:11,517 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 16:18:11,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:18:11,517 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 16:18:11,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2000081440, now seen corresponding path program 4 times [2024-06-04 16:18:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:11,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444829905] [2024-06-04 16:18:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:11,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:11,693 INFO 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 16:18:11,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:11,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444829905] [2024-06-04 16:18:11,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444829905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:11,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:11,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:11,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68052433] [2024-06-04 16:18:11,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:11,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:11,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:11,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:11,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 378 transitions, 5440 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:11,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:11,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:11,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:13,231 INFO L124 PetriNetUnfolderBase]: 4634/8024 cut-off events. [2024-06-04 16:18:13,232 INFO L125 PetriNetUnfolderBase]: For 901534/901534 co-relation queries the response was YES. [2024-06-04 16:18:13,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56565 conditions, 8024 events. 4634/8024 cut-off events. For 901534/901534 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58488 event pairs, 1481 based on Foata normal form. 2/8025 useless extension candidates. Maximal degree in co-relation 56417. Up to 6828 conditions per place. [2024-06-04 16:18:13,322 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 151 changer transitions 0/412 dead transitions. [2024-06-04 16:18:13,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 412 transitions, 6772 flow [2024-06-04 16:18:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:18:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:18:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-04 16:18:13,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:18:13,323 INFO L175 Difference]: Start difference. First operand has 306 places, 378 transitions, 5440 flow. Second operand 9 states and 219 transitions. [2024-06-04 16:18:13,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 412 transitions, 6772 flow [2024-06-04 16:18:16,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 412 transitions, 6390 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-04 16:18:16,641 INFO L231 Difference]: Finished difference. Result has 304 places, 382 transitions, 5446 flow [2024-06-04 16:18:16,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5446, PETRI_PLACES=304, PETRI_TRANSITIONS=382} [2024-06-04 16:18:16,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-04 16:18:16,642 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 382 transitions, 5446 flow [2024-06-04 16:18:16,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:16,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:16,642 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 16:18:16,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:18:16,642 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 16:18:16,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1675340320, now seen corresponding path program 5 times [2024-06-04 16:18:16,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:16,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729815281] [2024-06-04 16:18:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:16,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:16,826 INFO 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 16:18:16,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:16,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729815281] [2024-06-04 16:18:16,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729815281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:16,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:16,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:16,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747123714] [2024-06-04 16:18:16,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:16,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:16,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:16,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:16,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 382 transitions, 5446 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:16,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:16,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:16,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:18,204 INFO L124 PetriNetUnfolderBase]: 4644/8042 cut-off events. [2024-06-04 16:18:18,204 INFO L125 PetriNetUnfolderBase]: For 901552/901552 co-relation queries the response was YES. [2024-06-04 16:18:18,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56771 conditions, 8042 events. 4644/8042 cut-off events. For 901552/901552 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58604 event pairs, 1481 based on Foata normal form. 2/8043 useless extension candidates. Maximal degree in co-relation 56623. Up to 6838 conditions per place. [2024-06-04 16:18:18,312 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 160 changer transitions 0/414 dead transitions. [2024-06-04 16:18:18,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 414 transitions, 6784 flow [2024-06-04 16:18:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:18:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:18:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-04 16:18:18,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-04 16:18:18,313 INFO L175 Difference]: Start difference. First operand has 304 places, 382 transitions, 5446 flow. Second operand 10 states and 237 transitions. [2024-06-04 16:18:18,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 414 transitions, 6784 flow [2024-06-04 16:18:21,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 414 transitions, 6471 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 16:18:21,017 INFO L231 Difference]: Finished difference. Result has 308 places, 386 transitions, 5542 flow [2024-06-04 16:18:21,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5542, PETRI_PLACES=308, PETRI_TRANSITIONS=386} [2024-06-04 16:18:21,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-04 16:18:21,018 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 386 transitions, 5542 flow [2024-06-04 16:18:21,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:21,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:21,019 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, 1] [2024-06-04 16:18:21,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:18:21,019 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 16:18:21,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1085911392, now seen corresponding path program 6 times [2024-06-04 16:18:21,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:21,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562054417] [2024-06-04 16:18:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:21,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:21,215 INFO 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 16:18:21,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:21,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562054417] [2024-06-04 16:18:21,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562054417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:21,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:21,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:21,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145825078] [2024-06-04 16:18:21,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:21,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:21,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:21,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:21,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 386 transitions, 5542 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:21,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:21,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:21,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:22,675 INFO L124 PetriNetUnfolderBase]: 4638/8034 cut-off events. [2024-06-04 16:18:22,675 INFO L125 PetriNetUnfolderBase]: For 912130/912130 co-relation queries the response was YES. [2024-06-04 16:18:22,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56537 conditions, 8034 events. 4638/8034 cut-off events. For 912130/912130 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58558 event pairs, 1481 based on Foata normal form. 2/8035 useless extension candidates. Maximal degree in co-relation 56389. Up to 6833 conditions per place. [2024-06-04 16:18:22,787 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 242 selfloop transitions, 164 changer transitions 0/413 dead transitions. [2024-06-04 16:18:22,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 413 transitions, 6610 flow [2024-06-04 16:18:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:18:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:18:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-04 16:18:22,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-04 16:18:22,789 INFO L175 Difference]: Start difference. First operand has 308 places, 386 transitions, 5542 flow. Second operand 10 states and 236 transitions. [2024-06-04 16:18:22,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 413 transitions, 6610 flow [2024-06-04 16:18:26,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 413 transitions, 6267 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:26,332 INFO L231 Difference]: Finished difference. Result has 311 places, 386 transitions, 5535 flow [2024-06-04 16:18:26,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5535, PETRI_PLACES=311, PETRI_TRANSITIONS=386} [2024-06-04 16:18:26,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-04 16:18:26,333 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 386 transitions, 5535 flow [2024-06-04 16:18:26,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:26,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:26,334 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 16:18:26,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:18:26,334 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 16:18:26,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:26,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1272612956, now seen corresponding path program 7 times [2024-06-04 16:18:26,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:26,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455605388] [2024-06-04 16:18:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:26,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:26,515 INFO 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 16:18:26,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:26,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455605388] [2024-06-04 16:18:26,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455605388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:26,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:26,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:26,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262565376] [2024-06-04 16:18:26,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:26,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:26,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:26,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:26,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 386 transitions, 5535 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:26,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:26,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:26,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:28,004 INFO L124 PetriNetUnfolderBase]: 4643/8042 cut-off events. [2024-06-04 16:18:28,004 INFO L125 PetriNetUnfolderBase]: For 925822/925822 co-relation queries the response was YES. [2024-06-04 16:18:28,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56778 conditions, 8042 events. 4643/8042 cut-off events. For 925822/925822 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58658 event pairs, 1489 based on Foata normal form. 1/8041 useless extension candidates. Maximal degree in co-relation 56629. Up to 6837 conditions per place. [2024-06-04 16:18:28,105 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 210 selfloop transitions, 193 changer transitions 0/410 dead transitions. [2024-06-04 16:18:28,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 410 transitions, 6823 flow [2024-06-04 16:18:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:18:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:18:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 16:18:28,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-04 16:18:28,107 INFO L175 Difference]: Start difference. First operand has 311 places, 386 transitions, 5535 flow. Second operand 9 states and 212 transitions. [2024-06-04 16:18:28,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 410 transitions, 6823 flow [2024-06-04 16:18:31,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 410 transitions, 6337 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-04 16:18:31,473 INFO L231 Difference]: Finished difference. Result has 308 places, 389 transitions, 5489 flow [2024-06-04 16:18:31,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5489, PETRI_PLACES=308, PETRI_TRANSITIONS=389} [2024-06-04 16:18:31,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-04 16:18:31,474 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 389 transitions, 5489 flow [2024-06-04 16:18:31,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:31,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:31,474 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 16:18:31,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:18:31,475 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 16:18:31,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:31,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1634551884, now seen corresponding path program 8 times [2024-06-04 16:18:31,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:31,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97209778] [2024-06-04 16:18:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:31,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:31,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:31,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97209778] [2024-06-04 16:18:31,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97209778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:31,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:31,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:31,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522574715] [2024-06-04 16:18:31,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:31,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:31,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:31,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 389 transitions, 5489 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:31,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:31,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:31,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:33,124 INFO L124 PetriNetUnfolderBase]: 4648/8055 cut-off events. [2024-06-04 16:18:33,125 INFO L125 PetriNetUnfolderBase]: For 945087/945087 co-relation queries the response was YES. [2024-06-04 16:18:33,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56836 conditions, 8055 events. 4648/8055 cut-off events. For 945087/945087 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 58792 event pairs, 1493 based on Foata normal form. 1/8054 useless extension candidates. Maximal degree in co-relation 56688. Up to 6841 conditions per place. [2024-06-04 16:18:33,237 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 221 selfloop transitions, 186 changer transitions 0/414 dead transitions. [2024-06-04 16:18:33,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 414 transitions, 6789 flow [2024-06-04 16:18:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:18:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:18:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-04 16:18:33,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:18:33,238 INFO L175 Difference]: Start difference. First operand has 308 places, 389 transitions, 5489 flow. Second operand 10 states and 230 transitions. [2024-06-04 16:18:33,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 414 transitions, 6789 flow [2024-06-04 16:18:36,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 414 transitions, 6348 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:36,644 INFO L231 Difference]: Finished difference. Result has 311 places, 392 transitions, 5473 flow [2024-06-04 16:18:36,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5056, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5473, PETRI_PLACES=311, PETRI_TRANSITIONS=392} [2024-06-04 16:18:36,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-04 16:18:36,645 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 392 transitions, 5473 flow [2024-06-04 16:18:36,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:36,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:36,645 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 16:18:36,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:18:36,646 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 16:18:36,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1633743624, now seen corresponding path program 9 times [2024-06-04 16:18:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:36,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131247247] [2024-06-04 16:18:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:36,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:36,844 INFO 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 16:18:36,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:36,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131247247] [2024-06-04 16:18:36,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131247247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:36,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:36,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:36,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158080875] [2024-06-04 16:18:36,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:36,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:36,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:36,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:36,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:36,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:36,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 392 transitions, 5473 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:36,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:36,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:36,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:38,269 INFO L124 PetriNetUnfolderBase]: 4645/8047 cut-off events. [2024-06-04 16:18:38,270 INFO L125 PetriNetUnfolderBase]: For 957276/957276 co-relation queries the response was YES. [2024-06-04 16:18:38,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56867 conditions, 8047 events. 4645/8047 cut-off events. For 957276/957276 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58678 event pairs, 1489 based on Foata normal form. 1/8046 useless extension candidates. Maximal degree in co-relation 56718. Up to 6839 conditions per place. [2024-06-04 16:18:38,373 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 184 changer transitions 0/413 dead transitions. [2024-06-04 16:18:38,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 413 transitions, 6531 flow [2024-06-04 16:18:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:18:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:18:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-04 16:18:38,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-04 16:18:38,375 INFO L175 Difference]: Start difference. First operand has 311 places, 392 transitions, 5473 flow. Second operand 10 states and 228 transitions. [2024-06-04 16:18:38,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 413 transitions, 6531 flow [2024-06-04 16:18:41,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 413 transitions, 6052 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 16:18:41,655 INFO L231 Difference]: Finished difference. Result has 312 places, 392 transitions, 5370 flow [2024-06-04 16:18:41,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5370, PETRI_PLACES=312, PETRI_TRANSITIONS=392} [2024-06-04 16:18:41,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-04 16:18:41,656 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 392 transitions, 5370 flow [2024-06-04 16:18:41,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:41,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:41,656 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 16:18:41,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:18:41,657 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 16:18:41,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:41,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1618226520, now seen corresponding path program 1 times [2024-06-04 16:18:41,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:41,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553700822] [2024-06-04 16:18:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:41,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:41,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:41,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553700822] [2024-06-04 16:18:41,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553700822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:41,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:41,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:41,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743039636] [2024-06-04 16:18:41,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:41,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:41,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:41,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:41,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 392 transitions, 5370 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:41,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:41,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:41,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:43,343 INFO L124 PetriNetUnfolderBase]: 4632/8029 cut-off events. [2024-06-04 16:18:43,343 INFO L125 PetriNetUnfolderBase]: For 972086/972086 co-relation queries the response was YES. [2024-06-04 16:18:43,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56283 conditions, 8029 events. 4632/8029 cut-off events. For 972086/972086 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 58712 event pairs, 1307 based on Foata normal form. 6/8034 useless extension candidates. Maximal degree in co-relation 56133. Up to 7087 conditions per place. [2024-06-04 16:18:43,458 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 378 selfloop transitions, 37 changer transitions 0/422 dead transitions. [2024-06-04 16:18:43,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 422 transitions, 6518 flow [2024-06-04 16:18:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:18:43,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 16:18:43,460 INFO L175 Difference]: Start difference. First operand has 312 places, 392 transitions, 5370 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:18:43,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 422 transitions, 6518 flow [2024-06-04 16:18:46,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 422 transitions, 6051 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-04 16:18:46,602 INFO L231 Difference]: Finished difference. Result has 309 places, 392 transitions, 4981 flow [2024-06-04 16:18:46,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4981, PETRI_PLACES=309, PETRI_TRANSITIONS=392} [2024-06-04 16:18:46,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-04 16:18:46,603 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 392 transitions, 4981 flow [2024-06-04 16:18:46,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:46,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:46,603 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 16:18:46,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:18:46,604 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 16:18:46,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:46,604 INFO L85 PathProgramCache]: Analyzing trace with hash -535279930, now seen corresponding path program 2 times [2024-06-04 16:18:46,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:46,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631051564] [2024-06-04 16:18:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:46,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:46,806 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 16:18:46,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631051564] [2024-06-04 16:18:46,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631051564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:46,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:46,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:46,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059964926] [2024-06-04 16:18:46,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:46,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:46,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:46,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:46,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:46,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:46,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 392 transitions, 4981 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:46,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:46,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:46,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:48,217 INFO L124 PetriNetUnfolderBase]: 4619/8010 cut-off events. [2024-06-04 16:18:48,217 INFO L125 PetriNetUnfolderBase]: For 959853/959853 co-relation queries the response was YES. [2024-06-04 16:18:48,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55080 conditions, 8010 events. 4619/8010 cut-off events. For 959853/959853 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 58535 event pairs, 1398 based on Foata normal form. 6/8015 useless extension candidates. Maximal degree in co-relation 54930. Up to 7143 conditions per place. [2024-06-04 16:18:48,482 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 373 selfloop transitions, 38 changer transitions 0/418 dead transitions. [2024-06-04 16:18:48,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 418 transitions, 5913 flow [2024-06-04 16:18:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:18:48,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-04 16:18:48,483 INFO L175 Difference]: Start difference. First operand has 309 places, 392 transitions, 4981 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:18:48,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 418 transitions, 5913 flow [2024-06-04 16:18:51,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 418 transitions, 5762 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:51,411 INFO L231 Difference]: Finished difference. Result has 310 places, 392 transitions, 4912 flow [2024-06-04 16:18:51,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4912, PETRI_PLACES=310, PETRI_TRANSITIONS=392} [2024-06-04 16:18:51,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-04 16:18:51,412 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 392 transitions, 4912 flow [2024-06-04 16:18:51,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:51,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:51,412 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 16:18:51,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:18:51,413 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 16:18:51,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash -654797896, now seen corresponding path program 1 times [2024-06-04 16:18:51,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:51,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156014211] [2024-06-04 16:18:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:51,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:51,605 INFO 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 16:18:51,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:51,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156014211] [2024-06-04 16:18:51,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156014211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:51,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:51,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:51,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414952969] [2024-06-04 16:18:51,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:51,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:51,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:51,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:51,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:51,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 392 transitions, 4912 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:51,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:51,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:51,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:53,093 INFO L124 PetriNetUnfolderBase]: 4660/8061 cut-off events. [2024-06-04 16:18:53,093 INFO L125 PetriNetUnfolderBase]: For 987938/987938 co-relation queries the response was YES. [2024-06-04 16:18:53,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56004 conditions, 8061 events. 4660/8061 cut-off events. For 987938/987938 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 58836 event pairs, 1468 based on Foata normal form. 2/8054 useless extension candidates. Maximal degree in co-relation 55855. Up to 7109 conditions per place. [2024-06-04 16:18:53,205 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 326 selfloop transitions, 93 changer transitions 1/427 dead transitions. [2024-06-04 16:18:53,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 427 transitions, 6230 flow [2024-06-04 16:18:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 16:18:53,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 16:18:53,206 INFO L175 Difference]: Start difference. First operand has 310 places, 392 transitions, 4912 flow. Second operand 8 states and 198 transitions. [2024-06-04 16:18:53,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 427 transitions, 6230 flow [2024-06-04 16:18:56,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 427 transitions, 6134 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:56,651 INFO L231 Difference]: Finished difference. Result has 312 places, 396 transitions, 5172 flow [2024-06-04 16:18:56,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4816, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5172, PETRI_PLACES=312, PETRI_TRANSITIONS=396} [2024-06-04 16:18:56,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-04 16:18:56,651 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 396 transitions, 5172 flow [2024-06-04 16:18:56,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:56,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:56,652 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 16:18:56,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:18:56,652 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 16:18:56,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:56,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1790416350, now seen corresponding path program 2 times [2024-06-04 16:18:56,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:56,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469608694] [2024-06-04 16:18:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:56,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:56,873 INFO 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 16:18:56,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:56,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469608694] [2024-06-04 16:18:56,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469608694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:56,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:56,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:56,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505891547] [2024-06-04 16:18:56,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:56,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:56,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:56,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:56,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 396 transitions, 5172 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:56,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:56,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:56,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:58,298 INFO L124 PetriNetUnfolderBase]: 4648/8057 cut-off events. [2024-06-04 16:18:58,298 INFO L125 PetriNetUnfolderBase]: For 996018/996018 co-relation queries the response was YES. [2024-06-04 16:18:58,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56139 conditions, 8057 events. 4648/8057 cut-off events. For 996018/996018 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58857 event pairs, 1488 based on Foata normal form. 2/8055 useless extension candidates. Maximal degree in co-relation 55988. Up to 7194 conditions per place. [2024-06-04 16:18:58,411 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 321 selfloop transitions, 90 changer transitions 0/418 dead transitions. [2024-06-04 16:18:58,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 418 transitions, 6048 flow [2024-06-04 16:18:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 16:18:58,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-04 16:18:58,413 INFO L175 Difference]: Start difference. First operand has 312 places, 396 transitions, 5172 flow. Second operand 8 states and 190 transitions. [2024-06-04 16:18:58,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 418 transitions, 6048 flow [2024-06-04 16:19:01,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 418 transitions, 5852 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-04 16:19:01,785 INFO L231 Difference]: Finished difference. Result has 316 places, 396 transitions, 5161 flow [2024-06-04 16:19:01,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4976, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5161, PETRI_PLACES=316, PETRI_TRANSITIONS=396} [2024-06-04 16:19:01,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-04 16:19:01,786 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 396 transitions, 5161 flow [2024-06-04 16:19:01,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:01,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:01,786 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 16:19:01,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:19:01,786 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 16:19:01,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1180451288, now seen corresponding path program 3 times [2024-06-04 16:19:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874233083] [2024-06-04 16:19:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:02,013 INFO 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 16:19:02,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:02,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874233083] [2024-06-04 16:19:02,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874233083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:02,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:02,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:02,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717875591] [2024-06-04 16:19:02,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:02,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:02,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:02,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:02,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:02,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 396 transitions, 5161 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:02,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:02,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:02,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:03,563 INFO L124 PetriNetUnfolderBase]: 4774/8256 cut-off events. [2024-06-04 16:19:03,564 INFO L125 PetriNetUnfolderBase]: For 1125958/1125958 co-relation queries the response was YES. [2024-06-04 16:19:03,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59981 conditions, 8256 events. 4774/8256 cut-off events. For 1125958/1125958 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 60447 event pairs, 1495 based on Foata normal form. 2/8250 useless extension candidates. Maximal degree in co-relation 59828. Up to 7293 conditions per place. [2024-06-04 16:19:03,663 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 368 selfloop transitions, 55 changer transitions 0/430 dead transitions. [2024-06-04 16:19:03,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 430 transitions, 6502 flow [2024-06-04 16:19:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:19:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:19:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 16:19:03,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-04 16:19:03,664 INFO L175 Difference]: Start difference. First operand has 316 places, 396 transitions, 5161 flow. Second operand 8 states and 190 transitions. [2024-06-04 16:19:03,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 430 transitions, 6502 flow [2024-06-04 16:19:08,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 430 transitions, 6279 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 16:19:08,160 INFO L231 Difference]: Finished difference. Result has 319 places, 401 transitions, 5229 flow [2024-06-04 16:19:08,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4938, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5229, PETRI_PLACES=319, PETRI_TRANSITIONS=401} [2024-06-04 16:19:08,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-04 16:19:08,160 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 401 transitions, 5229 flow [2024-06-04 16:19:08,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:08,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:08,161 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 16:19:08,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:19:08,161 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 16:19:08,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:08,161 INFO L85 PathProgramCache]: Analyzing trace with hash 141814018, now seen corresponding path program 4 times [2024-06-04 16:19:08,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:08,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613577188] [2024-06-04 16:19:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:08,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:08,366 INFO 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 16:19:08,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:08,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613577188] [2024-06-04 16:19:08,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613577188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:08,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:08,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847669681] [2024-06-04 16:19:08,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:08,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:08,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:08,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:08,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:08,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 401 transitions, 5229 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:08,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:08,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:08,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:09,905 INFO L124 PetriNetUnfolderBase]: 4782/8291 cut-off events. [2024-06-04 16:19:09,905 INFO L125 PetriNetUnfolderBase]: For 1147395/1147395 co-relation queries the response was YES. [2024-06-04 16:19:09,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60503 conditions, 8291 events. 4782/8291 cut-off events. For 1147395/1147395 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 60910 event pairs, 1526 based on Foata normal form. 2/8290 useless extension candidates. Maximal degree in co-relation 60348. Up to 7396 conditions per place. [2024-06-04 16:19:10,027 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 87 changer transitions 0/432 dead transitions. [2024-06-04 16:19:10,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 432 transitions, 6223 flow [2024-06-04 16:19:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:19:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:19:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-04 16:19:10,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-04 16:19:10,029 INFO L175 Difference]: Start difference. First operand has 319 places, 401 transitions, 5229 flow. Second operand 9 states and 214 transitions. [2024-06-04 16:19:10,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 432 transitions, 6223 flow [2024-06-04 16:19:13,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 432 transitions, 6113 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-04 16:19:13,949 INFO L231 Difference]: Finished difference. Result has 325 places, 403 transitions, 5374 flow [2024-06-04 16:19:13,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5374, PETRI_PLACES=325, PETRI_TRANSITIONS=403} [2024-06-04 16:19:13,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-04 16:19:13,950 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 403 transitions, 5374 flow [2024-06-04 16:19:13,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:13,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:13,950 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 16:19:13,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:19:13,951 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 16:19:13,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:13,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1333343512, now seen corresponding path program 5 times [2024-06-04 16:19:13,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:13,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331047604] [2024-06-04 16:19:13,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:13,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:14,151 INFO 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 16:19:14,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:14,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331047604] [2024-06-04 16:19:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331047604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:14,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:14,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:14,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337245025] [2024-06-04 16:19:14,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:14,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:14,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:14,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:14,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:14,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 403 transitions, 5374 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:14,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:14,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:14,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:15,788 INFO L124 PetriNetUnfolderBase]: 4882/8481 cut-off events. [2024-06-04 16:19:15,789 INFO L125 PetriNetUnfolderBase]: For 1261659/1261659 co-relation queries the response was YES. [2024-06-04 16:19:15,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63796 conditions, 8481 events. 4882/8481 cut-off events. For 1261659/1261659 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62613 event pairs, 1308 based on Foata normal form. 2/8482 useless extension candidates. Maximal degree in co-relation 63640. Up to 6100 conditions per place. [2024-06-04 16:19:15,906 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 123 changer transitions 0/452 dead transitions. [2024-06-04 16:19:15,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 452 transitions, 7038 flow [2024-06-04 16:19:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:19:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:19:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-04 16:19:15,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-04 16:19:15,907 INFO L175 Difference]: Start difference. First operand has 325 places, 403 transitions, 5374 flow. Second operand 9 states and 226 transitions. [2024-06-04 16:19:15,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 452 transitions, 7038 flow [2024-06-04 16:19:19,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 452 transitions, 6821 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 16:19:19,851 INFO L231 Difference]: Finished difference. Result has 327 places, 407 transitions, 5535 flow [2024-06-04 16:19:19,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5157, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5535, PETRI_PLACES=327, PETRI_TRANSITIONS=407} [2024-06-04 16:19:19,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-04 16:19:19,851 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 407 transitions, 5535 flow [2024-06-04 16:19:19,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:19,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:19,852 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 16:19:19,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:19:19,852 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 16:19:19,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:19,852 INFO L85 PathProgramCache]: Analyzing trace with hash 663161784, now seen corresponding path program 6 times [2024-06-04 16:19:19,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:19,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340651459] [2024-06-04 16:19:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:19,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:20,059 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 16:19:20,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:20,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340651459] [2024-06-04 16:19:20,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340651459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:20,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:20,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:20,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526245570] [2024-06-04 16:19:20,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:20,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:20,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:20,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:20,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:20,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:20,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 407 transitions, 5535 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:20,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:20,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:20,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:21,637 INFO L124 PetriNetUnfolderBase]: 4877/8456 cut-off events. [2024-06-04 16:19:21,637 INFO L125 PetriNetUnfolderBase]: For 1301358/1301358 co-relation queries the response was YES. [2024-06-04 16:19:21,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64191 conditions, 8456 events. 4877/8456 cut-off events. For 1301358/1301358 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62234 event pairs, 1363 based on Foata normal form. 8/8463 useless extension candidates. Maximal degree in co-relation 64034. Up to 6098 conditions per place. [2024-06-04 16:19:21,762 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 325 selfloop transitions, 117 changer transitions 0/449 dead transitions. [2024-06-04 16:19:21,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 449 transitions, 7037 flow [2024-06-04 16:19:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:19:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:19:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-04 16:19:21,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-04 16:19:21,763 INFO L175 Difference]: Start difference. First operand has 327 places, 407 transitions, 5535 flow. Second operand 9 states and 223 transitions. [2024-06-04 16:19:21,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 449 transitions, 7037 flow [2024-06-04 16:19:26,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 449 transitions, 6807 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-04 16:19:26,637 INFO L231 Difference]: Finished difference. Result has 330 places, 408 transitions, 5579 flow [2024-06-04 16:19:26,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5579, PETRI_PLACES=330, PETRI_TRANSITIONS=408} [2024-06-04 16:19:26,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-04 16:19:26,638 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 408 transitions, 5579 flow [2024-06-04 16:19:26,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:26,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:26,638 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 16:19:26,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:19:26,638 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 16:19:26,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:26,639 INFO L85 PathProgramCache]: Analyzing trace with hash -895790152, now seen corresponding path program 7 times [2024-06-04 16:19:26,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:26,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410584683] [2024-06-04 16:19:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:26,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:26,833 INFO 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 16:19:26,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:26,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410584683] [2024-06-04 16:19:26,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410584683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:26,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:26,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:26,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576647933] [2024-06-04 16:19:26,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:26,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:26,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:26,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:26,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:26,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 408 transitions, 5579 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:26,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:26,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:26,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:28,441 INFO L124 PetriNetUnfolderBase]: 4849/8418 cut-off events. [2024-06-04 16:19:28,441 INFO L125 PetriNetUnfolderBase]: For 1277501/1277501 co-relation queries the response was YES. [2024-06-04 16:19:28,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62904 conditions, 8418 events. 4849/8418 cut-off events. For 1277501/1277501 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 62050 event pairs, 1555 based on Foata normal form. 12/8429 useless extension candidates. Maximal degree in co-relation 62747. Up to 7463 conditions per place. [2024-06-04 16:19:28,569 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 91 changer transitions 0/439 dead transitions. [2024-06-04 16:19:28,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 439 transitions, 6548 flow [2024-06-04 16:19:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-04 16:19:28,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:19:28,570 INFO L175 Difference]: Start difference. First operand has 330 places, 408 transitions, 5579 flow. Second operand 10 states and 235 transitions. [2024-06-04 16:19:28,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 439 transitions, 6548 flow [2024-06-04 16:19:32,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 439 transitions, 6371 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:19:32,616 INFO L231 Difference]: Finished difference. Result has 334 places, 409 transitions, 5614 flow [2024-06-04 16:19:32,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5614, PETRI_PLACES=334, PETRI_TRANSITIONS=409} [2024-06-04 16:19:32,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-04 16:19:32,617 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 409 transitions, 5614 flow [2024-06-04 16:19:32,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:32,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:32,617 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 16:19:32,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:19:32,617 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 16:19:32,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:32,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1395241396, now seen corresponding path program 8 times [2024-06-04 16:19:32,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:32,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231819403] [2024-06-04 16:19:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:32,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:32,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:32,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231819403] [2024-06-04 16:19:32,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231819403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:32,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:32,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:32,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910157266] [2024-06-04 16:19:32,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:32,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:32,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:32,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:32,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:32,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:32,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 409 transitions, 5614 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:32,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:32,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:34,560 INFO L124 PetriNetUnfolderBase]: 4814/8355 cut-off events. [2024-06-04 16:19:34,560 INFO L125 PetriNetUnfolderBase]: For 1229905/1229905 co-relation queries the response was YES. [2024-06-04 16:19:34,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60997 conditions, 8355 events. 4814/8355 cut-off events. For 1229905/1229905 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 61470 event pairs, 1512 based on Foata normal form. 12/8366 useless extension candidates. Maximal degree in co-relation 60839. Up to 7126 conditions per place. [2024-06-04 16:19:34,671 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 101 changer transitions 0/443 dead transitions. [2024-06-04 16:19:34,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 443 transitions, 6590 flow [2024-06-04 16:19:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-04 16:19:34,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-04 16:19:34,672 INFO L175 Difference]: Start difference. First operand has 334 places, 409 transitions, 5614 flow. Second operand 10 states and 238 transitions. [2024-06-04 16:19:34,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 443 transitions, 6590 flow [2024-06-04 16:19:39,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 443 transitions, 6305 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-04 16:19:39,259 INFO L231 Difference]: Finished difference. Result has 336 places, 409 transitions, 5539 flow [2024-06-04 16:19:39,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5539, PETRI_PLACES=336, PETRI_TRANSITIONS=409} [2024-06-04 16:19:39,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-04 16:19:39,260 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 409 transitions, 5539 flow [2024-06-04 16:19:39,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:39,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:39,260 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 16:19:39,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:19:39,260 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 16:19:39,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:39,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1435275574, now seen corresponding path program 1 times [2024-06-04 16:19:39,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:39,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604636282] [2024-06-04 16:19:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:39,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:39,444 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 16:19:39,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:39,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604636282] [2024-06-04 16:19:39,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604636282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:39,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:39,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:39,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654832887] [2024-06-04 16:19:39,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:39,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:39,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:39,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:39,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:39,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:39,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 409 transitions, 5539 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:39,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:39,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:39,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:40,986 INFO L124 PetriNetUnfolderBase]: 4804/8348 cut-off events. [2024-06-04 16:19:40,986 INFO L125 PetriNetUnfolderBase]: For 1180009/1180009 co-relation queries the response was YES. [2024-06-04 16:19:41,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60359 conditions, 8348 events. 4804/8348 cut-off events. For 1180009/1180009 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61562 event pairs, 1544 based on Foata normal form. 4/8350 useless extension candidates. Maximal degree in co-relation 60200. Up to 7428 conditions per place. [2024-06-04 16:19:41,113 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 327 selfloop transitions, 99 changer transitions 0/433 dead transitions. [2024-06-04 16:19:41,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 433 transitions, 6547 flow [2024-06-04 16:19:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-04 16:19:41,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:19:41,115 INFO L175 Difference]: Start difference. First operand has 336 places, 409 transitions, 5539 flow. Second operand 10 states and 224 transitions. [2024-06-04 16:19:41,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 433 transitions, 6547 flow [2024-06-04 16:19:45,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 433 transitions, 6321 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 16:19:45,223 INFO L231 Difference]: Finished difference. Result has 337 places, 412 transitions, 5630 flow [2024-06-04 16:19:45,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5630, PETRI_PLACES=337, PETRI_TRANSITIONS=412} [2024-06-04 16:19:45,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-04 16:19:45,223 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 412 transitions, 5630 flow [2024-06-04 16:19:45,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:45,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:45,224 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 16:19:45,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:19:45,224 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 16:19:45,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:45,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1620371856, now seen corresponding path program 2 times [2024-06-04 16:19:45,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:45,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977786220] [2024-06-04 16:19:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:45,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:45,408 INFO 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 16:19:45,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:45,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977786220] [2024-06-04 16:19:45,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977786220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:45,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:45,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:45,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750970590] [2024-06-04 16:19:45,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:45,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:45,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:45,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:45,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:45,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:45,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 412 transitions, 5630 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:45,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:45,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:45,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:46,864 INFO L124 PetriNetUnfolderBase]: 4799/8341 cut-off events. [2024-06-04 16:19:46,864 INFO L125 PetriNetUnfolderBase]: For 1176042/1176042 co-relation queries the response was YES. [2024-06-04 16:19:46,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60162 conditions, 8341 events. 4799/8341 cut-off events. For 1176042/1176042 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61541 event pairs, 1541 based on Foata normal form. 2/8341 useless extension candidates. Maximal degree in co-relation 60002. Up to 7427 conditions per place. [2024-06-04 16:19:46,974 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 327 selfloop transitions, 100 changer transitions 0/434 dead transitions. [2024-06-04 16:19:46,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 434 transitions, 6607 flow [2024-06-04 16:19:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:19:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:19:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-04 16:19:46,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:19:46,976 INFO L175 Difference]: Start difference. First operand has 337 places, 412 transitions, 5630 flow. Second operand 9 states and 207 transitions. [2024-06-04 16:19:46,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 434 transitions, 6607 flow [2024-06-04 16:19:50,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 434 transitions, 6326 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-04 16:19:50,387 INFO L231 Difference]: Finished difference. Result has 338 places, 414 transitions, 5633 flow [2024-06-04 16:19:50,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5633, PETRI_PLACES=338, PETRI_TRANSITIONS=414} [2024-06-04 16:19:50,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-04 16:19:50,387 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 414 transitions, 5633 flow [2024-06-04 16:19:50,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:50,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:50,388 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 16:19:50,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:19:50,388 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 16:19:50,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1317689678, now seen corresponding path program 3 times [2024-06-04 16:19:50,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:50,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711023191] [2024-06-04 16:19:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:50,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:50,582 INFO 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 16:19:50,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:50,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711023191] [2024-06-04 16:19:50,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711023191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:50,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:50,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:50,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270254066] [2024-06-04 16:19:50,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:50,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:50,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:50,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:50,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:50,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:50,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 414 transitions, 5633 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:50,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:50,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:50,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:52,196 INFO L124 PetriNetUnfolderBase]: 4789/8321 cut-off events. [2024-06-04 16:19:52,197 INFO L125 PetriNetUnfolderBase]: For 1184251/1184251 co-relation queries the response was YES. [2024-06-04 16:19:52,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59543 conditions, 8321 events. 4789/8321 cut-off events. For 1184251/1184251 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61309 event pairs, 1529 based on Foata normal form. 4/8323 useless extension candidates. Maximal degree in co-relation 59382. Up to 7355 conditions per place. [2024-06-04 16:19:52,318 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 324 selfloop transitions, 108 changer transitions 0/439 dead transitions. [2024-06-04 16:19:52,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 439 transitions, 6654 flow [2024-06-04 16:19:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-04 16:19:52,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:19:52,320 INFO L175 Difference]: Start difference. First operand has 338 places, 414 transitions, 5633 flow. Second operand 10 states and 224 transitions. [2024-06-04 16:19:52,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 439 transitions, 6654 flow [2024-06-04 16:19:56,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 439 transitions, 6389 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-04 16:19:56,449 INFO L231 Difference]: Finished difference. Result has 341 places, 417 transitions, 5702 flow [2024-06-04 16:19:56,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5702, PETRI_PLACES=341, PETRI_TRANSITIONS=417} [2024-06-04 16:19:56,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-04 16:19:56,450 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 417 transitions, 5702 flow [2024-06-04 16:19:56,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:56,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:56,450 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 16:19:56,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:19:56,450 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 16:19:56,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:56,450 INFO L85 PathProgramCache]: Analyzing trace with hash 838531298, now seen corresponding path program 4 times [2024-06-04 16:19:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:56,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130722152] [2024-06-04 16:19:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:56,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:56,687 INFO 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 16:19:56,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:56,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130722152] [2024-06-04 16:19:56,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130722152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:56,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:56,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:56,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381499471] [2024-06-04 16:19:56,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:56,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:56,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:56,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:56,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:56,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 417 transitions, 5702 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:56,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:56,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:56,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:58,302 INFO L124 PetriNetUnfolderBase]: 4797/8323 cut-off events. [2024-06-04 16:19:58,302 INFO L125 PetriNetUnfolderBase]: For 1193423/1193423 co-relation queries the response was YES. [2024-06-04 16:19:58,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59874 conditions, 8323 events. 4797/8323 cut-off events. For 1193423/1193423 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61227 event pairs, 1521 based on Foata normal form. 2/8323 useless extension candidates. Maximal degree in co-relation 59712. Up to 7355 conditions per place. [2024-06-04 16:19:58,411 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 109 changer transitions 0/445 dead transitions. [2024-06-04 16:19:58,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 445 transitions, 6756 flow [2024-06-04 16:19:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:19:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:19:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:19:58,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-04 16:19:58,412 INFO L175 Difference]: Start difference. First operand has 341 places, 417 transitions, 5702 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:19:58,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 445 transitions, 6756 flow [2024-06-04 16:20:02,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 445 transitions, 6453 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-04 16:20:02,455 INFO L231 Difference]: Finished difference. Result has 343 places, 421 transitions, 5754 flow [2024-06-04 16:20:02,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5399, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5754, PETRI_PLACES=343, PETRI_TRANSITIONS=421} [2024-06-04 16:20:02,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-04 16:20:02,456 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 421 transitions, 5754 flow [2024-06-04 16:20:02,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:02,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:02,456 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, 1] [2024-06-04 16:20:02,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:20:02,456 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 16:20:02,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:02,457 INFO L85 PathProgramCache]: Analyzing trace with hash 152598546, now seen corresponding path program 5 times [2024-06-04 16:20:02,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:02,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123326166] [2024-06-04 16:20:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:02,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:02,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:02,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123326166] [2024-06-04 16:20:02,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123326166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:02,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:02,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:02,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431350852] [2024-06-04 16:20:02,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:02,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:02,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:02,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:02,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:02,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:02,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 421 transitions, 5754 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:02,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:02,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:02,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:04,449 INFO L124 PetriNetUnfolderBase]: 4805/8353 cut-off events. [2024-06-04 16:20:04,450 INFO L125 PetriNetUnfolderBase]: For 1215616/1215616 co-relation queries the response was YES. [2024-06-04 16:20:04,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60098 conditions, 8353 events. 4805/8353 cut-off events. For 1215616/1215616 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61833 event pairs, 1404 based on Foata normal form. 2/8353 useless extension candidates. Maximal degree in co-relation 59934. Up to 6982 conditions per place. [2024-06-04 16:20:04,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 132 changer transitions 0/455 dead transitions. [2024-06-04 16:20:04,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 455 transitions, 7130 flow [2024-06-04 16:20:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:20:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:20:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:20:04,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-04 16:20:04,552 INFO L175 Difference]: Start difference. First operand has 343 places, 421 transitions, 5754 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:20:04,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 455 transitions, 7130 flow [2024-06-04 16:20:08,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 455 transitions, 6896 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-04 16:20:08,760 INFO L231 Difference]: Finished difference. Result has 348 places, 426 transitions, 5975 flow [2024-06-04 16:20:08,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5520, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5975, PETRI_PLACES=348, PETRI_TRANSITIONS=426} [2024-06-04 16:20:08,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-04 16:20:08,761 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 426 transitions, 5975 flow [2024-06-04 16:20:08,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:08,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:08,761 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 16:20:08,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:20:08,761 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 16:20:08,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash 152835696, now seen corresponding path program 6 times [2024-06-04 16:20:08,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:08,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416340532] [2024-06-04 16:20:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:08,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:08,949 INFO 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 16:20:08,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:08,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416340532] [2024-06-04 16:20:08,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416340532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:08,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:08,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720242847] [2024-06-04 16:20:08,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:08,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:08,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:08,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:08,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:08,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 426 transitions, 5975 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:08,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:08,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:08,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:10,503 INFO L124 PetriNetUnfolderBase]: 4800/8344 cut-off events. [2024-06-04 16:20:10,503 INFO L125 PetriNetUnfolderBase]: For 1225775/1225775 co-relation queries the response was YES. [2024-06-04 16:20:10,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60384 conditions, 8344 events. 4800/8344 cut-off events. For 1225775/1225775 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 61670 event pairs, 1432 based on Foata normal form. 2/8344 useless extension candidates. Maximal degree in co-relation 60217. Up to 6978 conditions per place. [2024-06-04 16:20:10,630 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 128 changer transitions 0/452 dead transitions. [2024-06-04 16:20:10,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 452 transitions, 6966 flow [2024-06-04 16:20:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:20:10,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:20:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:20:10,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-04 16:20:10,631 INFO L175 Difference]: Start difference. First operand has 348 places, 426 transitions, 5975 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:20:10,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 452 transitions, 6966 flow [2024-06-04 16:20:15,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 452 transitions, 6507 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-06-04 16:20:15,599 INFO L231 Difference]: Finished difference. Result has 348 places, 427 transitions, 5808 flow [2024-06-04 16:20:15,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5808, PETRI_PLACES=348, PETRI_TRANSITIONS=427} [2024-06-04 16:20:15,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-04 16:20:15,600 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 427 transitions, 5808 flow [2024-06-04 16:20:15,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:15,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:15,600 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 16:20:15,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:20:15,600 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 16:20:15,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1368864726, now seen corresponding path program 1 times [2024-06-04 16:20:15,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:15,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864629877] [2024-06-04 16:20:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:15,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:15,795 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 16:20:15,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:15,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864629877] [2024-06-04 16:20:15,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864629877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:15,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:15,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:15,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097646750] [2024-06-04 16:20:15,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:15,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:15,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:15,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:15,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:15,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:15,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 427 transitions, 5808 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:15,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:15,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:15,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:17,399 INFO L124 PetriNetUnfolderBase]: 4795/8326 cut-off events. [2024-06-04 16:20:17,400 INFO L125 PetriNetUnfolderBase]: For 1242724/1242724 co-relation queries the response was YES. [2024-06-04 16:20:17,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59446 conditions, 8326 events. 4795/8326 cut-off events. For 1242724/1242724 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 61306 event pairs, 1312 based on Foata normal form. 8/8330 useless extension candidates. Maximal degree in co-relation 59281. Up to 6334 conditions per place. [2024-06-04 16:20:17,518 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 65 changer transitions 0/481 dead transitions. [2024-06-04 16:20:17,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 481 transitions, 7427 flow [2024-06-04 16:20:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:20:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:20:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-04 16:20:17,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5976190476190476 [2024-06-04 16:20:17,519 INFO L175 Difference]: Start difference. First operand has 348 places, 427 transitions, 5808 flow. Second operand 10 states and 251 transitions. [2024-06-04 16:20:17,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 481 transitions, 7427 flow [2024-06-04 16:20:21,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 481 transitions, 7213 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:20:21,835 INFO L231 Difference]: Finished difference. Result has 352 places, 429 transitions, 5771 flow [2024-06-04 16:20:21,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5771, PETRI_PLACES=352, PETRI_TRANSITIONS=429} [2024-06-04 16:20:21,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-04 16:20:21,836 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 429 transitions, 5771 flow [2024-06-04 16:20:21,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:21,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:21,836 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 16:20:21,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:20:21,837 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 16:20:21,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash 276932832, now seen corresponding path program 2 times [2024-06-04 16:20:21,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:21,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745780299] [2024-06-04 16:20:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:21,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:22,101 INFO 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 16:20:22,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:22,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745780299] [2024-06-04 16:20:22,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745780299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:22,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:22,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:22,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390064999] [2024-06-04 16:20:22,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:22,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:22,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:22,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:22,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:22,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 429 transitions, 5771 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:22,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:22,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:22,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:23,713 INFO L124 PetriNetUnfolderBase]: 4862/8431 cut-off events. [2024-06-04 16:20:23,714 INFO L125 PetriNetUnfolderBase]: For 1293123/1293123 co-relation queries the response was YES. [2024-06-04 16:20:23,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61392 conditions, 8431 events. 4862/8431 cut-off events. For 1293123/1293123 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 62175 event pairs, 1410 based on Foata normal form. 2/8425 useless extension candidates. Maximal degree in co-relation 61226. Up to 6368 conditions per place. [2024-06-04 16:20:23,839 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 69 changer transitions 0/478 dead transitions. [2024-06-04 16:20:23,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 478 transitions, 7408 flow [2024-06-04 16:20:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:20:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:20:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-04 16:20:23,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-04 16:20:23,841 INFO L175 Difference]: Start difference. First operand has 352 places, 429 transitions, 5771 flow. Second operand 10 states and 244 transitions. [2024-06-04 16:20:23,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 478 transitions, 7408 flow [2024-06-04 16:20:29,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 478 transitions, 7267 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 16:20:29,019 INFO L231 Difference]: Finished difference. Result has 356 places, 433 transitions, 5876 flow [2024-06-04 16:20:29,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5876, PETRI_PLACES=356, PETRI_TRANSITIONS=433} [2024-06-04 16:20:29,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-04 16:20:29,019 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 433 transitions, 5876 flow [2024-06-04 16:20:29,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:29,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:29,020 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 16:20:29,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:20:29,020 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 16:20:29,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:29,020 INFO L85 PathProgramCache]: Analyzing trace with hash -180564010, now seen corresponding path program 3 times [2024-06-04 16:20:29,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:29,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176676679] [2024-06-04 16:20:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:29,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:29,212 INFO 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 16:20:29,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:29,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176676679] [2024-06-04 16:20:29,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176676679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:29,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:29,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:29,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180644138] [2024-06-04 16:20:29,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:29,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:29,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:29,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:29,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:29,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:29,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 433 transitions, 5876 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:29,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:29,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:29,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:30,941 INFO L124 PetriNetUnfolderBase]: 4839/8397 cut-off events. [2024-06-04 16:20:30,941 INFO L125 PetriNetUnfolderBase]: For 1303533/1303533 co-relation queries the response was YES. [2024-06-04 16:20:31,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60263 conditions, 8397 events. 4839/8397 cut-off events. For 1303533/1303533 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 61963 event pairs, 1505 based on Foata normal form. 10/8404 useless extension candidates. Maximal degree in co-relation 60095. Up to 6894 conditions per place. [2024-06-04 16:20:31,067 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 55 changer transitions 0/475 dead transitions. [2024-06-04 16:20:31,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 475 transitions, 7184 flow [2024-06-04 16:20:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:20:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:20:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-04 16:20:31,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-04 16:20:31,069 INFO L175 Difference]: Start difference. First operand has 356 places, 433 transitions, 5876 flow. Second operand 9 states and 223 transitions. [2024-06-04 16:20:31,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 475 transitions, 7184 flow [2024-06-04 16:20:36,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 475 transitions, 7042 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 16:20:36,876 INFO L231 Difference]: Finished difference. Result has 359 places, 433 transitions, 5851 flow [2024-06-04 16:20:36,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5734, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5851, PETRI_PLACES=359, PETRI_TRANSITIONS=433} [2024-06-04 16:20:36,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-04 16:20:36,877 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 433 transitions, 5851 flow [2024-06-04 16:20:36,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:36,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:36,878 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 16:20:36,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:20:36,878 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 16:20:36,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash -171993130, now seen corresponding path program 4 times [2024-06-04 16:20:36,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:36,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218400637] [2024-06-04 16:20:36,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:36,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:37,124 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 16:20:37,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:37,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218400637] [2024-06-04 16:20:37,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218400637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:37,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:37,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:37,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051383210] [2024-06-04 16:20:37,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:37,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:37,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:37,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:37,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:37,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 433 transitions, 5851 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:37,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:37,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:37,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:38,846 INFO L124 PetriNetUnfolderBase]: 4829/8394 cut-off events. [2024-06-04 16:20:38,846 INFO L125 PetriNetUnfolderBase]: For 1271783/1271783 co-relation queries the response was YES. [2024-06-04 16:20:38,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59306 conditions, 8394 events. 4829/8394 cut-off events. For 1271783/1271783 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61984 event pairs, 1517 based on Foata normal form. 10/8403 useless extension candidates. Maximal degree in co-relation 59137. Up to 7575 conditions per place. [2024-06-04 16:20:38,962 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 52 changer transitions 0/467 dead transitions. [2024-06-04 16:20:38,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 467 transitions, 6912 flow [2024-06-04 16:20:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:20:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:20:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-04 16:20:38,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-04 16:20:38,963 INFO L175 Difference]: Start difference. First operand has 359 places, 433 transitions, 5851 flow. Second operand 9 states and 214 transitions. [2024-06-04 16:20:38,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 467 transitions, 6912 flow [2024-06-04 16:20:44,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 467 transitions, 6810 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 16:20:44,417 INFO L231 Difference]: Finished difference. Result has 361 places, 435 transitions, 5910 flow [2024-06-04 16:20:44,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5910, PETRI_PLACES=361, PETRI_TRANSITIONS=435} [2024-06-04 16:20:44,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-04 16:20:44,418 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 435 transitions, 5910 flow [2024-06-04 16:20:44,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:44,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:44,418 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 16:20:44,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:20:44,418 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 16:20:44,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:44,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1021259734, now seen corresponding path program 5 times [2024-06-04 16:20:44,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:44,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544386222] [2024-06-04 16:20:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:44,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:44,629 INFO 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 16:20:44,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:44,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544386222] [2024-06-04 16:20:44,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544386222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:44,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:44,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:44,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347202363] [2024-06-04 16:20:44,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:44,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:44,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:44,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:44,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 435 transitions, 5910 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:44,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:44,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:44,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:46,465 INFO L124 PetriNetUnfolderBase]: 4850/8422 cut-off events. [2024-06-04 16:20:46,465 INFO L125 PetriNetUnfolderBase]: For 1251025/1251025 co-relation queries the response was YES. [2024-06-04 16:20:46,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59985 conditions, 8422 events. 4850/8422 cut-off events. For 1251025/1251025 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62147 event pairs, 1515 based on Foata normal form. 2/8421 useless extension candidates. Maximal degree in co-relation 59815. Up to 7583 conditions per place. [2024-06-04 16:20:46,572 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 60 changer transitions 0/475 dead transitions. [2024-06-04 16:20:46,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 475 transitions, 7281 flow [2024-06-04 16:20:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-04 16:20:46,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 16:20:46,574 INFO L175 Difference]: Start difference. First operand has 361 places, 435 transitions, 5910 flow. Second operand 11 states and 252 transitions. [2024-06-04 16:20:46,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 475 transitions, 7281 flow [2024-06-04 16:20:53,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 475 transitions, 7159 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 16:20:53,122 INFO L231 Difference]: Finished difference. Result has 366 places, 439 transitions, 6026 flow [2024-06-04 16:20:53,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5788, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6026, PETRI_PLACES=366, PETRI_TRANSITIONS=439} [2024-06-04 16:20:53,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-04 16:20:53,123 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 439 transitions, 6026 flow [2024-06-04 16:20:53,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:53,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:53,123 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 16:20:53,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:20:53,124 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 16:20:53,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1024116694, now seen corresponding path program 6 times [2024-06-04 16:20:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:53,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960855350] [2024-06-04 16:20:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:53,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:53,338 INFO 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 16:20:53,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:53,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960855350] [2024-06-04 16:20:53,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960855350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:53,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:53,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5151784] [2024-06-04 16:20:53,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:53,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:53,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:53,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:53,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 439 transitions, 6026 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:53,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:53,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:53,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:55,186 INFO L124 PetriNetUnfolderBase]: 4845/8418 cut-off events. [2024-06-04 16:20:55,186 INFO L125 PetriNetUnfolderBase]: For 1256551/1256551 co-relation queries the response was YES. [2024-06-04 16:20:55,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59872 conditions, 8418 events. 4845/8418 cut-off events. For 1256551/1256551 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62161 event pairs, 1519 based on Foata normal form. 2/8419 useless extension candidates. Maximal degree in co-relation 59700. Up to 7631 conditions per place. [2024-06-04 16:20:55,313 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 54 changer transitions 0/470 dead transitions. [2024-06-04 16:20:55,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 470 transitions, 7028 flow [2024-06-04 16:20:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-04 16:20:55,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-04 16:20:55,314 INFO L175 Difference]: Start difference. First operand has 366 places, 439 transitions, 6026 flow. Second operand 11 states and 247 transitions. [2024-06-04 16:20:55,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 470 transitions, 7028 flow [2024-06-04 16:21:02,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 470 transitions, 6867 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:02,208 INFO L231 Difference]: Finished difference. Result has 369 places, 439 transitions, 5978 flow [2024-06-04 16:21:02,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5865, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5978, PETRI_PLACES=369, PETRI_TRANSITIONS=439} [2024-06-04 16:21:02,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-04 16:21:02,209 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 439 transitions, 5978 flow [2024-06-04 16:21:02,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:02,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:02,209 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 16:21:02,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:21:02,209 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 16:21:02,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash -171988015, now seen corresponding path program 1 times [2024-06-04 16:21:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:02,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168932481] [2024-06-04 16:21:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:02,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:02,410 INFO 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 16:21:02,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:02,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168932481] [2024-06-04 16:21:02,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168932481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:02,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:02,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:21:02,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907095288] [2024-06-04 16:21:02,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:02,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:21:02,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:21:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:21:02,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:02,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 439 transitions, 5978 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:02,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:02,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:02,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:04,069 INFO L124 PetriNetUnfolderBase]: 4850/8427 cut-off events. [2024-06-04 16:21:04,069 INFO L125 PetriNetUnfolderBase]: For 1268779/1268779 co-relation queries the response was YES. [2024-06-04 16:21:04,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59961 conditions, 8427 events. 4850/8427 cut-off events. For 1268779/1268779 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 62264 event pairs, 1519 based on Foata normal form. 1/8427 useless extension candidates. Maximal degree in co-relation 59788. Up to 7403 conditions per place. [2024-06-04 16:21:04,202 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 130 changer transitions 0/466 dead transitions. [2024-06-04 16:21:04,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 466 transitions, 7242 flow [2024-06-04 16:21:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:21:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:21:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 16:21:04,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-04 16:21:04,203 INFO L175 Difference]: Start difference. First operand has 369 places, 439 transitions, 5978 flow. Second operand 7 states and 177 transitions. [2024-06-04 16:21:04,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 466 transitions, 7242 flow [2024-06-04 16:21:10,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 466 transitions, 7113 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-04 16:21:10,795 INFO L231 Difference]: Finished difference. Result has 366 places, 442 transitions, 6168 flow [2024-06-04 16:21:10,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6168, PETRI_PLACES=366, PETRI_TRANSITIONS=442} [2024-06-04 16:21:10,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-04 16:21:10,796 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 442 transitions, 6168 flow [2024-06-04 16:21:10,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:10,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:10,796 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 16:21:10,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:21:10,796 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 16:21:10,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:10,797 INFO L85 PathProgramCache]: Analyzing trace with hash -171982435, now seen corresponding path program 2 times [2024-06-04 16:21:10,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:10,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387049070] [2024-06-04 16:21:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:10,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:10,983 INFO 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 16:21:10,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:10,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387049070] [2024-06-04 16:21:10,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387049070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:10,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:10,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:21:10,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168785274] [2024-06-04 16:21:10,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:10,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:21:10,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:10,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:21:10,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:21:11,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:11,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 442 transitions, 6168 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:11,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:11,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:11,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:12,662 INFO L124 PetriNetUnfolderBase]: 4855/8436 cut-off events. [2024-06-04 16:21:12,662 INFO L125 PetriNetUnfolderBase]: For 1290048/1290048 co-relation queries the response was YES. [2024-06-04 16:21:12,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60428 conditions, 8436 events. 4855/8436 cut-off events. For 1290048/1290048 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62336 event pairs, 1519 based on Foata normal form. 1/8436 useless extension candidates. Maximal degree in co-relation 60254. Up to 7409 conditions per place. [2024-06-04 16:21:12,782 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 124 changer transitions 0/466 dead transitions. [2024-06-04 16:21:12,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 466 transitions, 7432 flow [2024-06-04 16:21:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:21:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:21:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:21:12,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:21:12,783 INFO L175 Difference]: Start difference. First operand has 366 places, 442 transitions, 6168 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:21:12,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 466 transitions, 7432 flow [2024-06-04 16:21:19,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 466 transitions, 7145 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:21:19,389 INFO L231 Difference]: Finished difference. Result has 367 places, 445 transitions, 6198 flow [2024-06-04 16:21:19,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5889, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6198, PETRI_PLACES=367, PETRI_TRANSITIONS=445} [2024-06-04 16:21:19,390 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-04 16:21:19,390 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 445 transitions, 6198 flow [2024-06-04 16:21:19,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:19,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:19,390 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 16:21:19,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:21:19,390 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 16:21:19,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash -60602585, now seen corresponding path program 3 times [2024-06-04 16:21:19,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:19,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236249885] [2024-06-04 16:21:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:19,579 INFO 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 16:21:19,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236249885] [2024-06-04 16:21:19,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236249885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:19,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:19,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:21:19,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618356584] [2024-06-04 16:21:19,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:19,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:21:19,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:19,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:21:19,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:21:19,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:19,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 445 transitions, 6198 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:19,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:19,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:19,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:21,378 INFO L124 PetriNetUnfolderBase]: 4852/8432 cut-off events. [2024-06-04 16:21:21,379 INFO L125 PetriNetUnfolderBase]: For 1282406/1282406 co-relation queries the response was YES. [2024-06-04 16:21:21,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60264 conditions, 8432 events. 4852/8432 cut-off events. For 1282406/1282406 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62327 event pairs, 1519 based on Foata normal form. 1/8432 useless extension candidates. Maximal degree in co-relation 60090. Up to 7406 conditions per place. [2024-06-04 16:21:21,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 127 changer transitions 0/467 dead transitions. [2024-06-04 16:21:21,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 467 transitions, 7172 flow [2024-06-04 16:21:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:21:21,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-04 16:21:21,495 INFO L175 Difference]: Start difference. First operand has 367 places, 445 transitions, 6198 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:21:21,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 467 transitions, 7172 flow [2024-06-04 16:21:28,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 467 transitions, 6985 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 16:21:28,542 INFO L231 Difference]: Finished difference. Result has 371 places, 445 transitions, 6275 flow [2024-06-04 16:21:28,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6011, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6275, PETRI_PLACES=371, PETRI_TRANSITIONS=445} [2024-06-04 16:21:28,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-04 16:21:28,543 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 445 transitions, 6275 flow [2024-06-04 16:21:28,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:28,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:28,544 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 16:21:28,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:21:28,546 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 16:21:28,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:28,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1881563138, now seen corresponding path program 7 times [2024-06-04 16:21:28,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:28,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398069037] [2024-06-04 16:21:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:28,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:28,742 INFO 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 16:21:28,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:28,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398069037] [2024-06-04 16:21:28,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398069037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:28,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:28,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:28,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133692841] [2024-06-04 16:21:28,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:28,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:28,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:28,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:28,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:28,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:28,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 445 transitions, 6275 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:28,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:28,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:28,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:30,627 INFO L124 PetriNetUnfolderBase]: 4888/8474 cut-off events. [2024-06-04 16:21:30,628 INFO L125 PetriNetUnfolderBase]: For 1352409/1352409 co-relation queries the response was YES. [2024-06-04 16:21:30,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60711 conditions, 8474 events. 4888/8474 cut-off events. For 1352409/1352409 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 62498 event pairs, 1517 based on Foata normal form. 10/8482 useless extension candidates. Maximal degree in co-relation 60537. Up to 6219 conditions per place. [2024-06-04 16:21:30,743 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 177 changer transitions 0/487 dead transitions. [2024-06-04 16:21:30,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 487 transitions, 7896 flow [2024-06-04 16:21:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-04 16:21:30,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-06-04 16:21:30,744 INFO L175 Difference]: Start difference. First operand has 371 places, 445 transitions, 6275 flow. Second operand 9 states and 230 transitions. [2024-06-04 16:21:30,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 487 transitions, 7896 flow [2024-06-04 16:21:37,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 487 transitions, 7385 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-04 16:21:37,464 INFO L231 Difference]: Finished difference. Result has 368 places, 447 transitions, 6173 flow [2024-06-04 16:21:37,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5768, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6173, PETRI_PLACES=368, PETRI_TRANSITIONS=447} [2024-06-04 16:21:37,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-04 16:21:37,465 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 447 transitions, 6173 flow [2024-06-04 16:21:37,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:37,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:37,465 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 16:21:37,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:21:37,466 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 16:21:37,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1872992258, now seen corresponding path program 8 times [2024-06-04 16:21:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:37,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353668444] [2024-06-04 16:21:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:37,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:37,660 INFO 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 16:21:37,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:37,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353668444] [2024-06-04 16:21:37,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353668444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:37,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:37,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132636034] [2024-06-04 16:21:37,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:37,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:37,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:37,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:37,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 447 transitions, 6173 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:37,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:37,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:37,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:39,546 INFO L124 PetriNetUnfolderBase]: 4924/8544 cut-off events. [2024-06-04 16:21:39,547 INFO L125 PetriNetUnfolderBase]: For 1355055/1355055 co-relation queries the response was YES. [2024-06-04 16:21:39,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61255 conditions, 8544 events. 4924/8544 cut-off events. For 1355055/1355055 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 63198 event pairs, 1539 based on Foata normal form. 10/8552 useless extension candidates. Maximal degree in co-relation 61082. Up to 7234 conditions per place. [2024-06-04 16:21:39,661 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 173 changer transitions 0/479 dead transitions. [2024-06-04 16:21:39,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 479 transitions, 7494 flow [2024-06-04 16:21:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 16:21:39,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-04 16:21:39,663 INFO L175 Difference]: Start difference. First operand has 368 places, 447 transitions, 6173 flow. Second operand 9 states and 221 transitions. [2024-06-04 16:21:39,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 479 transitions, 7494 flow [2024-06-04 16:21:45,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 479 transitions, 7146 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 16:21:45,489 INFO L231 Difference]: Finished difference. Result has 371 places, 449 transitions, 6226 flow [2024-06-04 16:21:45,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5826, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6226, PETRI_PLACES=371, PETRI_TRANSITIONS=449} [2024-06-04 16:21:45,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-04 16:21:45,489 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 449 transitions, 6226 flow [2024-06-04 16:21:45,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:45,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:45,490 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 16:21:45,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:21:45,490 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 16:21:45,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:45,490 INFO L85 PathProgramCache]: Analyzing trace with hash 696129494, now seen corresponding path program 9 times [2024-06-04 16:21:45,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:45,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223605338] [2024-06-04 16:21:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:45,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:45,687 INFO 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 16:21:45,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:45,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223605338] [2024-06-04 16:21:45,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223605338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:45,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:45,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:45,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238457660] [2024-06-04 16:21:45,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:45,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:45,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:45,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:45,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:45,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:45,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 449 transitions, 6226 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:45,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:45,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:45,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:47,609 INFO L124 PetriNetUnfolderBase]: 4914/8530 cut-off events. [2024-06-04 16:21:47,610 INFO L125 PetriNetUnfolderBase]: For 1315707/1315707 co-relation queries the response was YES. [2024-06-04 16:21:47,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60282 conditions, 8530 events. 4914/8530 cut-off events. For 1315707/1315707 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 63105 event pairs, 1531 based on Foata normal form. 10/8538 useless extension candidates. Maximal degree in co-relation 60108. Up to 7220 conditions per place. [2024-06-04 16:21:47,722 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 176 changer transitions 0/478 dead transitions. [2024-06-04 16:21:47,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 478 transitions, 7542 flow [2024-06-04 16:21:47,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:21:47,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-04 16:21:47,723 INFO L175 Difference]: Start difference. First operand has 371 places, 449 transitions, 6226 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:21:47,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 478 transitions, 7542 flow [2024-06-04 16:21:53,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 478 transitions, 7178 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 16:21:53,456 INFO L231 Difference]: Finished difference. Result has 373 places, 451 transitions, 6272 flow [2024-06-04 16:21:53,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6272, PETRI_PLACES=373, PETRI_TRANSITIONS=451} [2024-06-04 16:21:53,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-04 16:21:53,457 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 451 transitions, 6272 flow [2024-06-04 16:21:53,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:53,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:53,457 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 16:21:53,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:21:53,458 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 16:21:53,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash -893564970, now seen corresponding path program 10 times [2024-06-04 16:21:53,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:53,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767750932] [2024-06-04 16:21:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:53,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:53,668 INFO 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 16:21:53,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:53,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767750932] [2024-06-04 16:21:53,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767750932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:53,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:53,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:53,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249421188] [2024-06-04 16:21:53,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:53,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:53,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:53,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:53,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 451 transitions, 6272 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:21:53,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:53,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:53,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:55,387 INFO L124 PetriNetUnfolderBase]: 4922/8542 cut-off events. [2024-06-04 16:21:55,388 INFO L125 PetriNetUnfolderBase]: For 1274300/1274300 co-relation queries the response was YES. [2024-06-04 16:21:55,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60464 conditions, 8542 events. 4922/8542 cut-off events. For 1274300/1274300 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 63139 event pairs, 1531 based on Foata normal form. 2/8542 useless extension candidates. Maximal degree in co-relation 60289. Up to 7264 conditions per place. [2024-06-04 16:21:55,735 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 279 selfloop transitions, 188 changer transitions 0/474 dead transitions. [2024-06-04 16:21:55,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 474 transitions, 7556 flow [2024-06-04 16:21:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:21:55,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-04 16:21:55,737 INFO L175 Difference]: Start difference. First operand has 373 places, 451 transitions, 6272 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:21:55,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 474 transitions, 7556 flow [2024-06-04 16:22:01,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 474 transitions, 7182 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:01,774 INFO L231 Difference]: Finished difference. Result has 375 places, 453 transitions, 6335 flow [2024-06-04 16:22:01,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5898, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6335, PETRI_PLACES=375, PETRI_TRANSITIONS=453} [2024-06-04 16:22:01,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-04 16:22:01,775 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 453 transitions, 6335 flow [2024-06-04 16:22:01,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:01,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:01,775 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 16:22:01,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:22:01,775 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 16:22:01,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:01,776 INFO L85 PathProgramCache]: Analyzing trace with hash -124294402, now seen corresponding path program 11 times [2024-06-04 16:22:01,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:01,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157739954] [2024-06-04 16:22:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:01,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:01,992 INFO 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 16:22:01,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:01,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157739954] [2024-06-04 16:22:01,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157739954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:01,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:01,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:01,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944729489] [2024-06-04 16:22:01,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:01,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:01,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:02,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:02,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 453 transitions, 6335 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:02,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:02,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:02,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:03,811 INFO L124 PetriNetUnfolderBase]: 4930/8554 cut-off events. [2024-06-04 16:22:03,811 INFO L125 PetriNetUnfolderBase]: For 1293278/1293278 co-relation queries the response was YES. [2024-06-04 16:22:03,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60612 conditions, 8554 events. 4930/8554 cut-off events. For 1293278/1293278 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 63246 event pairs, 1519 based on Foata normal form. 2/8555 useless extension candidates. Maximal degree in co-relation 60436. Up to 7808 conditions per place. [2024-06-04 16:22:03,957 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 38 changer transitions 0/475 dead transitions. [2024-06-04 16:22:03,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 475 transitions, 7373 flow [2024-06-04 16:22:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-04 16:22:03,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:22:03,959 INFO L175 Difference]: Start difference. First operand has 375 places, 453 transitions, 6335 flow. Second operand 9 states and 198 transitions. [2024-06-04 16:22:03,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 475 transitions, 7373 flow [2024-06-04 16:22:10,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 475 transitions, 6960 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:10,945 INFO L231 Difference]: Finished difference. Result has 377 places, 455 transitions, 6061 flow [2024-06-04 16:22:10,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5922, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6061, PETRI_PLACES=377, PETRI_TRANSITIONS=455} [2024-06-04 16:22:10,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-04 16:22:10,946 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 455 transitions, 6061 flow [2024-06-04 16:22:10,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:10,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:10,947 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 16:22:10,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:22:10,947 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 16:22:10,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1064385510, now seen corresponding path program 12 times [2024-06-04 16:22:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707910263] [2024-06-04 16:22:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:10,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:11,173 INFO 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 16:22:11,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:11,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707910263] [2024-06-04 16:22:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707910263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:11,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:11,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:22:11,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785493548] [2024-06-04 16:22:11,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:11,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:22:11,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:22:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:22:11,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:11,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 455 transitions, 6061 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:11,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:11,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:11,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:12,998 INFO L124 PetriNetUnfolderBase]: 4938/8566 cut-off events. [2024-06-04 16:22:12,998 INFO L125 PetriNetUnfolderBase]: For 1311223/1311223 co-relation queries the response was YES. [2024-06-04 16:22:13,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60347 conditions, 8566 events. 4938/8566 cut-off events. For 1311223/1311223 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 63225 event pairs, 1519 based on Foata normal form. 2/8567 useless extension candidates. Maximal degree in co-relation 60170. Up to 7806 conditions per place. [2024-06-04 16:22:13,134 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 42 changer transitions 0/479 dead transitions. [2024-06-04 16:22:13,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 479 transitions, 7106 flow [2024-06-04 16:22:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:22:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:22:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-04 16:22:13,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-04 16:22:13,135 INFO L175 Difference]: Start difference. First operand has 377 places, 455 transitions, 6061 flow. Second operand 10 states and 217 transitions. [2024-06-04 16:22:13,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 479 transitions, 7106 flow [2024-06-04 16:22:20,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 479 transitions, 6993 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-04 16:22:20,355 INFO L231 Difference]: Finished difference. Result has 380 places, 457 transitions, 6090 flow [2024-06-04 16:22:20,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6090, PETRI_PLACES=380, PETRI_TRANSITIONS=457} [2024-06-04 16:22:20,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-04 16:22:20,355 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 457 transitions, 6090 flow [2024-06-04 16:22:20,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:20,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:20,356 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 16:22:20,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:22:20,356 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 16:22:20,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:20,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1872987143, now seen corresponding path program 4 times [2024-06-04 16:22:20,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:20,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613558008] [2024-06-04 16:22:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:20,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:20,536 INFO 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 16:22:20,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:20,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613558008] [2024-06-04 16:22:20,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613558008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:20,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:20,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:22:20,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157669326] [2024-06-04 16:22:20,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:20,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:22:20,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:20,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:22:20,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:22:20,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:20,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 457 transitions, 6090 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:20,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:20,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:20,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:22,483 INFO L124 PetriNetUnfolderBase]: 4951/8588 cut-off events. [2024-06-04 16:22:22,483 INFO L125 PetriNetUnfolderBase]: For 1331134/1331134 co-relation queries the response was YES. [2024-06-04 16:22:22,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60709 conditions, 8588 events. 4951/8588 cut-off events. For 1331134/1331134 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 63517 event pairs, 1521 based on Foata normal form. 1/8588 useless extension candidates. Maximal degree in co-relation 60531. Up to 7309 conditions per place. [2024-06-04 16:22:22,626 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 178 changer transitions 0/496 dead transitions. [2024-06-04 16:22:22,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 496 transitions, 7720 flow [2024-06-04 16:22:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:22:22,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:22:22,628 INFO L175 Difference]: Start difference. First operand has 380 places, 457 transitions, 6090 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:22:22,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 496 transitions, 7720 flow [2024-06-04 16:22:29,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 496 transitions, 7603 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:29,657 INFO L231 Difference]: Finished difference. Result has 381 places, 463 transitions, 6398 flow [2024-06-04 16:22:29,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5973, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6398, PETRI_PLACES=381, PETRI_TRANSITIONS=463} [2024-06-04 16:22:29,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-04 16:22:29,657 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 463 transitions, 6398 flow [2024-06-04 16:22:29,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:29,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:29,658 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 16:22:29,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 16:22:29,658 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 16:22:29,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:29,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1872981563, now seen corresponding path program 5 times [2024-06-04 16:22:29,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:29,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711613263] [2024-06-04 16:22:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:29,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:29,839 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 16:22:29,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:29,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711613263] [2024-06-04 16:22:29,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711613263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:29,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:29,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:22:29,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470433847] [2024-06-04 16:22:29,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:29,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:22:29,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:29,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:22:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:22:29,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:29,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 463 transitions, 6398 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:29,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:29,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:29,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:31,727 INFO L124 PetriNetUnfolderBase]: 4964/8610 cut-off events. [2024-06-04 16:22:31,728 INFO L125 PetriNetUnfolderBase]: For 1361259/1361259 co-relation queries the response was YES. [2024-06-04 16:22:31,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61558 conditions, 8610 events. 4964/8610 cut-off events. For 1361259/1361259 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63673 event pairs, 1521 based on Foata normal form. 1/8610 useless extension candidates. Maximal degree in co-relation 61379. Up to 7324 conditions per place. [2024-06-04 16:22:31,855 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 180 changer transitions 0/499 dead transitions. [2024-06-04 16:22:31,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 499 transitions, 8042 flow [2024-06-04 16:22:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-04 16:22:31,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767195767195767 [2024-06-04 16:22:31,857 INFO L175 Difference]: Start difference. First operand has 381 places, 463 transitions, 6398 flow. Second operand 9 states and 218 transitions. [2024-06-04 16:22:31,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 499 transitions, 8042 flow [2024-06-04 16:22:38,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 499 transitions, 7790 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:22:38,971 INFO L231 Difference]: Finished difference. Result has 385 places, 469 transitions, 6588 flow [2024-06-04 16:22:38,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6588, PETRI_PLACES=385, PETRI_TRANSITIONS=469} [2024-06-04 16:22:38,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-04 16:22:38,971 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 469 transitions, 6588 flow [2024-06-04 16:22:38,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:38,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:38,972 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 16:22:38,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 16:22:38,972 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 16:22:38,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash -389517925, now seen corresponding path program 6 times [2024-06-04 16:22:38,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:38,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930591224] [2024-06-04 16:22:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:38,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:39,145 INFO 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 16:22:39,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:39,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930591224] [2024-06-04 16:22:39,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930591224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:39,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:39,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:22:39,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466916846] [2024-06-04 16:22:39,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:39,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:22:39,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:39,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:22:39,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:22:39,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:39,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 469 transitions, 6588 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:39,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:39,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:39,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:41,101 INFO L124 PetriNetUnfolderBase]: 4961/8606 cut-off events. [2024-06-04 16:22:41,102 INFO L125 PetriNetUnfolderBase]: For 1374347/1374347 co-relation queries the response was YES. [2024-06-04 16:22:41,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61698 conditions, 8606 events. 4961/8606 cut-off events. For 1374347/1374347 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63675 event pairs, 1521 based on Foata normal form. 1/8606 useless extension candidates. Maximal degree in co-relation 61518. Up to 7321 conditions per place. [2024-06-04 16:22:41,230 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 296 selfloop transitions, 203 changer transitions 0/506 dead transitions. [2024-06-04 16:22:41,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 506 transitions, 8194 flow [2024-06-04 16:22:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:22:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:22:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-04 16:22:41,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-04 16:22:41,231 INFO L175 Difference]: Start difference. First operand has 385 places, 469 transitions, 6588 flow. Second operand 10 states and 243 transitions. [2024-06-04 16:22:41,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 506 transitions, 8194 flow [2024-06-04 16:22:47,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 506 transitions, 7938 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:22:47,961 INFO L231 Difference]: Finished difference. Result has 390 places, 469 transitions, 6746 flow [2024-06-04 16:22:47,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6332, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6746, PETRI_PLACES=390, PETRI_TRANSITIONS=469} [2024-06-04 16:22:47,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-04 16:22:47,967 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 469 transitions, 6746 flow [2024-06-04 16:22:47,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:47,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:47,967 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 16:22:47,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 16:22:47,968 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 16:22:47,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash 737628533, now seen corresponding path program 7 times [2024-06-04 16:22:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:47,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453225181] [2024-06-04 16:22:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:47,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:48,179 INFO 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 16:22:48,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:48,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453225181] [2024-06-04 16:22:48,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453225181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:48,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:48,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:22:48,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134439417] [2024-06-04 16:22:48,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:48,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:22:48,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:48,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:22:48,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:22:48,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:48,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 469 transitions, 6746 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:48,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:48,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:48,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:50,091 INFO L124 PetriNetUnfolderBase]: 4974/8628 cut-off events. [2024-06-04 16:22:50,091 INFO L125 PetriNetUnfolderBase]: For 1404254/1404254 co-relation queries the response was YES. [2024-06-04 16:22:50,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62274 conditions, 8628 events. 4974/8628 cut-off events. For 1404254/1404254 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 63824 event pairs, 1521 based on Foata normal form. 1/8628 useless extension candidates. Maximal degree in co-relation 62093. Up to 7336 conditions per place. [2024-06-04 16:22:50,224 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 308 selfloop transitions, 187 changer transitions 0/502 dead transitions. [2024-06-04 16:22:50,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 502 transitions, 8408 flow [2024-06-04 16:22:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:22:50,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-04 16:22:50,226 INFO L175 Difference]: Start difference. First operand has 390 places, 469 transitions, 6746 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:22:50,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 502 transitions, 8408 flow [2024-06-04 16:22:57,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 502 transitions, 7815 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 16:22:57,655 INFO L231 Difference]: Finished difference. Result has 389 places, 475 transitions, 6620 flow [2024-06-04 16:22:57,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6171, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6620, PETRI_PLACES=389, PETRI_TRANSITIONS=475} [2024-06-04 16:22:57,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-04 16:22:57,663 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 475 transitions, 6620 flow [2024-06-04 16:22:57,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:57,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:57,664 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 16:22:57,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 16:22:57,664 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 16:22:57,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:57,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1851160515, now seen corresponding path program 8 times [2024-06-04 16:22:57,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:57,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736326377] [2024-06-04 16:22:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:57,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:57,843 INFO 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 16:22:57,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:57,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736326377] [2024-06-04 16:22:57,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736326377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:57,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:57,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:22:57,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140713047] [2024-06-04 16:22:57,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:57,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:22:57,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:57,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:22:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:22:57,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:57,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 475 transitions, 6620 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:22:57,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:57,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:57,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:59,787 INFO L124 PetriNetUnfolderBase]: 4979/8637 cut-off events. [2024-06-04 16:22:59,788 INFO L125 PetriNetUnfolderBase]: For 1423821/1423821 co-relation queries the response was YES. [2024-06-04 16:22:59,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62228 conditions, 8637 events. 4979/8637 cut-off events. For 1423821/1423821 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63974 event pairs, 1521 based on Foata normal form. 1/8637 useless extension candidates. Maximal degree in co-relation 62046. Up to 7342 conditions per place. [2024-06-04 16:22:59,909 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 305 selfloop transitions, 193 changer transitions 0/505 dead transitions. [2024-06-04 16:22:59,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 505 transitions, 8246 flow [2024-06-04 16:22:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:22:59,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-04 16:22:59,910 INFO L175 Difference]: Start difference. First operand has 389 places, 475 transitions, 6620 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:22:59,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 505 transitions, 8246 flow [2024-06-04 16:23:08,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 505 transitions, 7993 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:23:08,360 INFO L231 Difference]: Finished difference. Result has 393 places, 478 transitions, 6800 flow [2024-06-04 16:23:08,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6370, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6800, PETRI_PLACES=393, PETRI_TRANSITIONS=478} [2024-06-04 16:23:08,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-04 16:23:08,361 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 478 transitions, 6800 flow [2024-06-04 16:23:08,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:08,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:08,361 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 16:23:08,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 16:23:08,361 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 16:23:08,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:08,362 INFO L85 PathProgramCache]: Analyzing trace with hash 702949649, now seen corresponding path program 9 times [2024-06-04 16:23:08,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:08,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971281987] [2024-06-04 16:23:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:08,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:08,538 INFO 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 16:23:08,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:08,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971281987] [2024-06-04 16:23:08,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971281987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:08,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:08,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:23:08,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404505095] [2024-06-04 16:23:08,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:08,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:23:08,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:08,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:23:08,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:23:08,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:08,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 478 transitions, 6800 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:08,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:08,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:08,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:10,571 INFO L124 PetriNetUnfolderBase]: 4976/8633 cut-off events. [2024-06-04 16:23:10,571 INFO L125 PetriNetUnfolderBase]: For 1437805/1437805 co-relation queries the response was YES. [2024-06-04 16:23:10,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62320 conditions, 8633 events. 4976/8633 cut-off events. For 1437805/1437805 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63877 event pairs, 1521 based on Foata normal form. 1/8633 useless extension candidates. Maximal degree in co-relation 62137. Up to 7339 conditions per place. [2024-06-04 16:23:10,709 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 212 changer transitions 0/511 dead transitions. [2024-06-04 16:23:10,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 511 transitions, 8154 flow [2024-06-04 16:23:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:23:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:23:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-04 16:23:10,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-04 16:23:10,710 INFO L175 Difference]: Start difference. First operand has 393 places, 478 transitions, 6800 flow. Second operand 10 states and 238 transitions. [2024-06-04 16:23:10,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 511 transitions, 8154 flow [2024-06-04 16:23:19,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 511 transitions, 7847 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:23:19,073 INFO L231 Difference]: Finished difference. Result has 397 places, 478 transitions, 6924 flow [2024-06-04 16:23:19,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6924, PETRI_PLACES=397, PETRI_TRANSITIONS=478} [2024-06-04 16:23:19,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-04 16:23:19,074 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 478 transitions, 6924 flow [2024-06-04 16:23:19,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:19,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:19,074 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 16:23:19,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 16:23:19,074 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 16:23:19,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1742097297, now seen corresponding path program 10 times [2024-06-04 16:23:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110005011] [2024-06-04 16:23:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:19,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:23:19,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:19,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110005011] [2024-06-04 16:23:19,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110005011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:19,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:19,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:23:19,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958438276] [2024-06-04 16:23:19,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:19,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:23:19,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:23:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:23:19,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:19,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 478 transitions, 6924 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:19,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:19,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:19,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:21,241 INFO L124 PetriNetUnfolderBase]: 4973/8629 cut-off events. [2024-06-04 16:23:21,242 INFO L125 PetriNetUnfolderBase]: For 1450344/1450344 co-relation queries the response was YES. [2024-06-04 16:23:21,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62456 conditions, 8629 events. 4973/8629 cut-off events. For 1450344/1450344 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63917 event pairs, 1533 based on Foata normal form. 1/8628 useless extension candidates. Maximal degree in co-relation 62272. Up to 7336 conditions per place. [2024-06-04 16:23:21,373 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 308 selfloop transitions, 182 changer transitions 0/497 dead transitions. [2024-06-04 16:23:21,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 497 transitions, 8216 flow [2024-06-04 16:23:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:23:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:23:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:23:21,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 16:23:21,375 INFO L175 Difference]: Start difference. First operand has 397 places, 478 transitions, 6924 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:23:21,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 497 transitions, 8216 flow [2024-06-04 16:23:29,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 497 transitions, 7788 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:23:29,969 INFO L231 Difference]: Finished difference. Result has 396 places, 478 transitions, 6866 flow [2024-06-04 16:23:29,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6866, PETRI_PLACES=396, PETRI_TRANSITIONS=478} [2024-06-04 16:23:29,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-04 16:23:29,970 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 478 transitions, 6866 flow [2024-06-04 16:23:29,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:29,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:29,970 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 16:23:29,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 16:23:29,971 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 16:23:29,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1779732039, now seen corresponding path program 11 times [2024-06-04 16:23:29,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:29,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58736100] [2024-06-04 16:23:29,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:29,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:30,154 INFO 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 16:23:30,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:30,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58736100] [2024-06-04 16:23:30,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58736100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:30,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:30,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:23:30,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928732930] [2024-06-04 16:23:30,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:30,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:23:30,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:23:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:23:30,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:30,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 478 transitions, 6866 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:30,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:30,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:30,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:32,087 INFO L124 PetriNetUnfolderBase]: 4970/8625 cut-off events. [2024-06-04 16:23:32,087 INFO L125 PetriNetUnfolderBase]: For 1463014/1463014 co-relation queries the response was YES. [2024-06-04 16:23:32,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62393 conditions, 8625 events. 4970/8625 cut-off events. For 1463014/1463014 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63819 event pairs, 1533 based on Foata normal form. 1/8624 useless extension candidates. Maximal degree in co-relation 62208. Up to 7333 conditions per place. [2024-06-04 16:23:32,213 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 308 selfloop transitions, 181 changer transitions 0/496 dead transitions. [2024-06-04 16:23:32,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 496 transitions, 7888 flow [2024-06-04 16:23:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:23:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:23:32,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:23:32,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 16:23:32,214 INFO L175 Difference]: Start difference. First operand has 396 places, 478 transitions, 6866 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:23:32,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 496 transitions, 7888 flow [2024-06-04 16:23:40,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 496 transitions, 6967 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-04 16:23:40,054 INFO L231 Difference]: Finished difference. Result has 393 places, 478 transitions, 6313 flow [2024-06-04 16:23:40,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6313, PETRI_PLACES=393, PETRI_TRANSITIONS=478} [2024-06-04 16:23:40,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-04 16:23:40,055 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 478 transitions, 6313 flow [2024-06-04 16:23:40,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:40,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:40,056 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 16:23:40,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 16:23:40,056 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 16:23:40,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:40,056 INFO L85 PathProgramCache]: Analyzing trace with hash 243103357, now seen corresponding path program 1 times [2024-06-04 16:23:40,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:40,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966591359] [2024-06-04 16:23:40,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:40,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:40,273 INFO 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 16:23:40,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:40,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966591359] [2024-06-04 16:23:40,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966591359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:40,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:40,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:23:40,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33808919] [2024-06-04 16:23:40,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:40,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:23:40,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:40,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:23:40,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:23:40,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:40,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 478 transitions, 6313 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:40,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:40,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:40,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:42,180 INFO L124 PetriNetUnfolderBase]: 4957/8606 cut-off events. [2024-06-04 16:23:42,181 INFO L125 PetriNetUnfolderBase]: For 1469362/1469362 co-relation queries the response was YES. [2024-06-04 16:23:42,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61154 conditions, 8606 events. 4957/8606 cut-off events. For 1469362/1469362 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63643 event pairs, 1311 based on Foata normal form. 6/8611 useless extension candidates. Maximal degree in co-relation 60968. Up to 6329 conditions per place. [2024-06-04 16:23:42,316 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 385 selfloop transitions, 125 changer transitions 0/517 dead transitions. [2024-06-04 16:23:42,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 517 transitions, 7719 flow [2024-06-04 16:23:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:23:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:23:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:23:42,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:23:42,318 INFO L175 Difference]: Start difference. First operand has 393 places, 478 transitions, 6313 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:23:42,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 517 transitions, 7719 flow [2024-06-04 16:23:52,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 517 transitions, 7215 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 16:23:52,039 INFO L231 Difference]: Finished difference. Result has 393 places, 478 transitions, 6069 flow [2024-06-04 16:23:52,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6069, PETRI_PLACES=393, PETRI_TRANSITIONS=478} [2024-06-04 16:23:52,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-04 16:23:52,040 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 478 transitions, 6069 flow [2024-06-04 16:23:52,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:52,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:52,041 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 16:23:52,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 16:23:52,041 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 16:23:52,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:52,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1406324778, now seen corresponding path program 13 times [2024-06-04 16:23:52,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:52,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560027713] [2024-06-04 16:23:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:52,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:52,234 INFO 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 16:23:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560027713] [2024-06-04 16:23:52,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560027713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:52,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:52,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:23:52,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551736897] [2024-06-04 16:23:52,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:52,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:23:52,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:23:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:23:52,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:52,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 478 transitions, 6069 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:52,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:52,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:52,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:54,146 INFO L124 PetriNetUnfolderBase]: 4993/8653 cut-off events. [2024-06-04 16:23:54,146 INFO L125 PetriNetUnfolderBase]: For 1532244/1532244 co-relation queries the response was YES. [2024-06-04 16:23:54,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61841 conditions, 8653 events. 4993/8653 cut-off events. For 1532244/1532244 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 64001 event pairs, 1500 based on Foata normal form. 10/8662 useless extension candidates. Maximal degree in co-relation 61654. Up to 6014 conditions per place. [2024-06-04 16:23:54,275 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 334 selfloop transitions, 185 changer transitions 0/526 dead transitions. [2024-06-04 16:23:54,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 526 transitions, 7576 flow [2024-06-04 16:23:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:23:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:23:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-04 16:23:54,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:23:54,276 INFO L175 Difference]: Start difference. First operand has 393 places, 478 transitions, 6069 flow. Second operand 10 states and 252 transitions. [2024-06-04 16:23:54,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 526 transitions, 7576 flow [2024-06-04 16:24:03,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 526 transitions, 7309 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 16:24:03,590 INFO L231 Difference]: Finished difference. Result has 394 places, 480 transitions, 6234 flow [2024-06-04 16:24:03,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5804, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6234, PETRI_PLACES=394, PETRI_TRANSITIONS=480} [2024-06-04 16:24:03,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-04 16:24:03,591 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 480 transitions, 6234 flow [2024-06-04 16:24:03,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:03,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:03,591 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 16:24:03,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 16:24:03,592 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 16:24:03,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash -27748696, now seen corresponding path program 14 times [2024-06-04 16:24:03,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:03,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194625281] [2024-06-04 16:24:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:03,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:03,781 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 16:24:03,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:03,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194625281] [2024-06-04 16:24:03,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194625281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:03,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:03,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:24:03,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790439685] [2024-06-04 16:24:03,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:03,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:24:03,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:03,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:24:03,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:24:03,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:03,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 480 transitions, 6234 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:03,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:03,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:03,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:05,678 INFO L124 PetriNetUnfolderBase]: 5029/8718 cut-off events. [2024-06-04 16:24:05,678 INFO L125 PetriNetUnfolderBase]: For 1534911/1534911 co-relation queries the response was YES. [2024-06-04 16:24:05,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62328 conditions, 8718 events. 5029/8718 cut-off events. For 1534911/1534911 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 64566 event pairs, 1522 based on Foata normal form. 10/8727 useless extension candidates. Maximal degree in co-relation 62141. Up to 7388 conditions per place. [2024-06-04 16:24:05,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 180 changer transitions 0/518 dead transitions. [2024-06-04 16:24:05,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 518 transitions, 7413 flow [2024-06-04 16:24:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:24:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:24:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-04 16:24:05,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-04 16:24:05,813 INFO L175 Difference]: Start difference. First operand has 394 places, 480 transitions, 6234 flow. Second operand 10 states and 243 transitions. [2024-06-04 16:24:05,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 518 transitions, 7413 flow [2024-06-04 16:24:15,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 518 transitions, 7048 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 16:24:15,960 INFO L231 Difference]: Finished difference. Result has 397 places, 482 transitions, 6292 flow [2024-06-04 16:24:15,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6292, PETRI_PLACES=397, PETRI_TRANSITIONS=482} [2024-06-04 16:24:15,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-04 16:24:15,961 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 482 transitions, 6292 flow [2024-06-04 16:24:15,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:15,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:15,962 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 16:24:15,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 16:24:15,962 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 16:24:15,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1649549428, now seen corresponding path program 15 times [2024-06-04 16:24:15,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:15,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092546347] [2024-06-04 16:24:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:24:16,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:16,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092546347] [2024-06-04 16:24:16,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092546347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:16,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:16,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:24:16,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659194316] [2024-06-04 16:24:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:24:16,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:24:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:24:16,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:16,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 482 transitions, 6292 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:16,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:16,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:16,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:18,062 INFO L124 PetriNetUnfolderBase]: 5065/8774 cut-off events. [2024-06-04 16:24:18,063 INFO L125 PetriNetUnfolderBase]: For 1558444/1558444 co-relation queries the response was YES. [2024-06-04 16:24:18,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62838 conditions, 8774 events. 5065/8774 cut-off events. For 1558444/1558444 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 64979 event pairs, 1526 based on Foata normal form. 10/8783 useless extension candidates. Maximal degree in co-relation 62650. Up to 7444 conditions per place. [2024-06-04 16:24:18,193 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 179 changer transitions 0/517 dead transitions. [2024-06-04 16:24:18,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 517 transitions, 7464 flow [2024-06-04 16:24:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:24:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:24:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-04 16:24:18,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:24:18,194 INFO L175 Difference]: Start difference. First operand has 397 places, 482 transitions, 6292 flow. Second operand 10 states and 240 transitions. [2024-06-04 16:24:18,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 517 transitions, 7464 flow [2024-06-04 16:24:28,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 517 transitions, 7078 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 16:24:28,155 INFO L231 Difference]: Finished difference. Result has 399 places, 484 transitions, 6330 flow [2024-06-04 16:24:28,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5906, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6330, PETRI_PLACES=399, PETRI_TRANSITIONS=484} [2024-06-04 16:24:28,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-04 16:24:28,156 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 484 transitions, 6330 flow [2024-06-04 16:24:28,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:28,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:28,157 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 16:24:28,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 16:24:28,157 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 16:24:28,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:28,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1592424710, now seen corresponding path program 16 times [2024-06-04 16:24:28,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:28,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156026391] [2024-06-04 16:24:28,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:28,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:28,354 INFO 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 16:24:28,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:28,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156026391] [2024-06-04 16:24:28,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156026391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:28,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:28,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:24:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646620957] [2024-06-04 16:24:28,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:28,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:24:28,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:24:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:24:28,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:28,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 484 transitions, 6330 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:28,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:28,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:28,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:30,304 INFO L124 PetriNetUnfolderBase]: 5032/8715 cut-off events. [2024-06-04 16:24:30,305 INFO L125 PetriNetUnfolderBase]: For 1581844/1581844 co-relation queries the response was YES. [2024-06-04 16:24:30,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58076 conditions, 8715 events. 5032/8715 cut-off events. For 1581844/1581844 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 64492 event pairs, 1469 based on Foata normal form. 44/8758 useless extension candidates. Maximal degree in co-relation 57887. Up to 7231 conditions per place. [2024-06-04 16:24:30,441 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 188 changer transitions 3/519 dead transitions. [2024-06-04 16:24:30,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 519 transitions, 7514 flow [2024-06-04 16:24:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:24:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:24:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-04 16:24:30,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-04 16:24:30,442 INFO L175 Difference]: Start difference. First operand has 399 places, 484 transitions, 6330 flow. Second operand 11 states and 259 transitions. [2024-06-04 16:24:30,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 519 transitions, 7514 flow [2024-06-04 16:24:39,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 519 transitions, 7126 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 16:24:39,745 INFO L231 Difference]: Finished difference. Result has 402 places, 485 transitions, 6378 flow [2024-06-04 16:24:39,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6378, PETRI_PLACES=402, PETRI_TRANSITIONS=485} [2024-06-04 16:24:39,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-04 16:24:39,745 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 485 transitions, 6378 flow [2024-06-04 16:24:39,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:39,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:39,746 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 16:24:39,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 16:24:39,746 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 16:24:39,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1175594184, now seen corresponding path program 17 times [2024-06-04 16:24:39,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:39,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147398277] [2024-06-04 16:24:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:39,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:39,940 INFO 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 16:24:39,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:39,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147398277] [2024-06-04 16:24:39,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147398277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:39,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:39,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:24:39,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302104778] [2024-06-04 16:24:39,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:39,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:24:39,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:24:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:24:40,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:40,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 485 transitions, 6378 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:40,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:40,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:40,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:41,828 INFO L124 PetriNetUnfolderBase]: 4960/8594 cut-off events. [2024-06-04 16:24:41,828 INFO L125 PetriNetUnfolderBase]: For 1175022/1175022 co-relation queries the response was YES. [2024-06-04 16:24:41,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56024 conditions, 8594 events. 4960/8594 cut-off events. For 1175022/1175022 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 63367 event pairs, 1451 based on Foata normal form. 10/8602 useless extension candidates. Maximal degree in co-relation 55834. Up to 7277 conditions per place. [2024-06-04 16:24:41,962 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 206 changer transitions 5/510 dead transitions. [2024-06-04 16:24:41,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 510 transitions, 7458 flow [2024-06-04 16:24:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:24:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:24:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-04 16:24:41,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-04 16:24:41,963 INFO L175 Difference]: Start difference. First operand has 402 places, 485 transitions, 6378 flow. Second operand 11 states and 249 transitions. [2024-06-04 16:24:41,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 510 transitions, 7458 flow [2024-06-04 16:24:50,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 510 transitions, 7028 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-04 16:24:50,414 INFO L231 Difference]: Finished difference. Result has 404 places, 483 transitions, 6339 flow [2024-06-04 16:24:50,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6339, PETRI_PLACES=404, PETRI_TRANSITIONS=483} [2024-06-04 16:24:50,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-04 16:24:50,414 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 483 transitions, 6339 flow [2024-06-04 16:24:50,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:50,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:50,415 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 16:24:50,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 16:24:50,415 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 16:24:50,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1193358674, now seen corresponding path program 18 times [2024-06-04 16:24:50,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:50,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739909971] [2024-06-04 16:24:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:50,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:50,624 INFO 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 16:24:50,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739909971] [2024-06-04 16:24:50,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739909971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:50,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:50,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:24:50,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043612564] [2024-06-04 16:24:50,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:50,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:24:50,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:24:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:24:50,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:50,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 483 transitions, 6339 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:50,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:50,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:50,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:52,465 INFO L124 PetriNetUnfolderBase]: 4876/8430 cut-off events. [2024-06-04 16:24:52,465 INFO L125 PetriNetUnfolderBase]: For 1088534/1088534 co-relation queries the response was YES. [2024-06-04 16:24:52,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53620 conditions, 8430 events. 4876/8430 cut-off events. For 1088534/1088534 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 61919 event pairs, 1399 based on Foata normal form. 10/8438 useless extension candidates. Maximal degree in co-relation 53429. Up to 7139 conditions per place. [2024-06-04 16:24:52,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 208 changer transitions 4/507 dead transitions. [2024-06-04 16:24:52,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 507 transitions, 7411 flow [2024-06-04 16:24:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:24:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:24:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-04 16:24:52,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-06-04 16:24:52,623 INFO L175 Difference]: Start difference. First operand has 404 places, 483 transitions, 6339 flow. Second operand 10 states and 233 transitions. [2024-06-04 16:24:52,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 507 transitions, 7411 flow [2024-06-04 16:24:59,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 507 transitions, 6897 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-04 16:24:59,633 INFO L231 Difference]: Finished difference. Result has 403 places, 482 transitions, 6235 flow [2024-06-04 16:24:59,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5825, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6235, PETRI_PLACES=403, PETRI_TRANSITIONS=482} [2024-06-04 16:24:59,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-04 16:24:59,634 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 482 transitions, 6235 flow [2024-06-04 16:24:59,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:59,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:59,634 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 16:24:59,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 16:24:59,634 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 16:24:59,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:59,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1474288978, now seen corresponding path program 19 times [2024-06-04 16:24:59,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:59,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845641507] [2024-06-04 16:24:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:59,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:59,839 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 16:24:59,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:59,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845641507] [2024-06-04 16:24:59,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845641507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:59,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:59,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:24:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265308426] [2024-06-04 16:24:59,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:59,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:24:59,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:59,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:24:59,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:24:59,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:59,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 482 transitions, 6235 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:24:59,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:59,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:59,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:25:01,668 INFO L124 PetriNetUnfolderBase]: 4794/8279 cut-off events. [2024-06-04 16:25:01,668 INFO L125 PetriNetUnfolderBase]: For 1000589/1000589 co-relation queries the response was YES. [2024-06-04 16:25:01,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51210 conditions, 8279 events. 4794/8279 cut-off events. For 1000589/1000589 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 60546 event pairs, 1348 based on Foata normal form. 10/8288 useless extension candidates. Maximal degree in co-relation 51018. Up to 7534 conditions per place. [2024-06-04 16:25:01,789 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 36 changer transitions 4/506 dead transitions. [2024-06-04 16:25:01,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 506 transitions, 7305 flow [2024-06-04 16:25:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:25:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:25:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 16:25:01,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-04 16:25:01,792 INFO L175 Difference]: Start difference. First operand has 403 places, 482 transitions, 6235 flow. Second operand 10 states and 219 transitions. [2024-06-04 16:25:01,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 506 transitions, 7305 flow [2024-06-04 16:25:09,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 506 transitions, 6796 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-04 16:25:09,719 INFO L231 Difference]: Finished difference. Result has 403 places, 481 transitions, 5790 flow [2024-06-04 16:25:09,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5726, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5790, PETRI_PLACES=403, PETRI_TRANSITIONS=481} [2024-06-04 16:25:09,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-04 16:25:09,719 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 481 transitions, 5790 flow [2024-06-04 16:25:09,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:09,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:25:09,720 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, 1] [2024-06-04 16:25:09,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 16:25:09,720 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 16:25:09,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:25:09,720 INFO L85 PathProgramCache]: Analyzing trace with hash 866892808, now seen corresponding path program 20 times [2024-06-04 16:25:09,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:25:09,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122017019] [2024-06-04 16:25:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:25:09,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:25:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:25:09,936 INFO 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 16:25:09,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:25:09,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122017019] [2024-06-04 16:25:09,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122017019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:25:09,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:25:09,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:25:09,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46800605] [2024-06-04 16:25:09,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:25:09,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:25:09,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:25:09,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:25:09,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:25:09,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:25:09,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 481 transitions, 5790 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:09,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:25:09,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:25:09,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:25:11,756 INFO L124 PetriNetUnfolderBase]: 4712/8117 cut-off events. [2024-06-04 16:25:11,757 INFO L125 PetriNetUnfolderBase]: For 908393/908393 co-relation queries the response was YES. [2024-06-04 16:25:11,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48257 conditions, 8117 events. 4712/8117 cut-off events. For 908393/908393 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 58985 event pairs, 1278 based on Foata normal form. 10/8126 useless extension candidates. Maximal degree in co-relation 48064. Up to 7316 conditions per place. [2024-06-04 16:25:11,881 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 39 changer transitions 7/510 dead transitions. [2024-06-04 16:25:11,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 510 transitions, 6894 flow [2024-06-04 16:25:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:25:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:25:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-04 16:25:11,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-06-04 16:25:11,882 INFO L175 Difference]: Start difference. First operand has 403 places, 481 transitions, 5790 flow. Second operand 11 states and 240 transitions. [2024-06-04 16:25:11,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 510 transitions, 6894 flow [2024-06-04 16:25:18,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 510 transitions, 6718 flow, removed 23 selfloop flow, removed 12 redundant places. [2024-06-04 16:25:18,188 INFO L231 Difference]: Finished difference. Result has 402 places, 480 transitions, 5684 flow [2024-06-04 16:25:18,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5684, PETRI_PLACES=402, PETRI_TRANSITIONS=480} [2024-06-04 16:25:18,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-04 16:25:18,189 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 480 transitions, 5684 flow [2024-06-04 16:25:18,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:18,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:25:18,189 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 16:25:18,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 16:25:18,190 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 16:25:18,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:25:18,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1847346001, now seen corresponding path program 1 times [2024-06-04 16:25:18,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:25:18,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253575847] [2024-06-04 16:25:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:25:18,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:25:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:25:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:25:18,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:25:18,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253575847] [2024-06-04 16:25:18,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253575847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:25:18,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:25:18,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:25:18,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690662826] [2024-06-04 16:25:18,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:25:18,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:25:18,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:25:18,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:25:18,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:25:18,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:25:18,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 480 transitions, 5684 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:18,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:25:18,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:25:18,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:25:20,182 INFO L124 PetriNetUnfolderBase]: 4648/8017 cut-off events. [2024-06-04 16:25:20,182 INFO L125 PetriNetUnfolderBase]: For 817477/817477 co-relation queries the response was YES. [2024-06-04 16:25:20,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45678 conditions, 8017 events. 4648/8017 cut-off events. For 817477/817477 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 58240 event pairs, 1255 based on Foata normal form. 12/8022 useless extension candidates. Maximal degree in co-relation 45486. Up to 6970 conditions per place. [2024-06-04 16:25:20,291 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 415 selfloop transitions, 96 changer transitions 0/518 dead transitions. [2024-06-04 16:25:20,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 518 transitions, 6816 flow [2024-06-04 16:25:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:25:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:25:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:25:20,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:25:20,292 INFO L175 Difference]: Start difference. First operand has 402 places, 480 transitions, 5684 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:25:20,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 518 transitions, 6816 flow [2024-06-04 16:25:26,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 518 transitions, 6645 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-04 16:25:26,150 INFO L231 Difference]: Finished difference. Result has 400 places, 480 transitions, 5711 flow [2024-06-04 16:25:26,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5513, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5711, PETRI_PLACES=400, PETRI_TRANSITIONS=480} [2024-06-04 16:25:26,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-04 16:25:26,151 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 480 transitions, 5711 flow [2024-06-04 16:25:26,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:26,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:25:26,152 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 16:25:26,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 16:25:26,152 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 16:25:26,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:25:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1085205823, now seen corresponding path program 2 times [2024-06-04 16:25:26,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:25:26,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190638213] [2024-06-04 16:25:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:25:26,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:25:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:25:26,337 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 16:25:26,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:25:26,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190638213] [2024-06-04 16:25:26,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190638213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:25:26,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:25:26,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:25:26,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163233554] [2024-06-04 16:25:26,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:25:26,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:25:26,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:25:26,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:25:26,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:25:26,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:25:26,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 480 transitions, 5711 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:26,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:25:26,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:25:26,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:25:28,021 INFO L124 PetriNetUnfolderBase]: 4688/8119 cut-off events. [2024-06-04 16:25:28,021 INFO L125 PetriNetUnfolderBase]: For 829377/829377 co-relation queries the response was YES. [2024-06-04 16:25:28,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46182 conditions, 8119 events. 4688/8119 cut-off events. For 829377/829377 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 59279 event pairs, 1059 based on Foata normal form. 12/8130 useless extension candidates. Maximal degree in co-relation 45989. Up to 5868 conditions per place. [2024-06-04 16:25:28,170 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 389 selfloop transitions, 125 changer transitions 0/521 dead transitions. [2024-06-04 16:25:28,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 521 transitions, 7202 flow [2024-06-04 16:25:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:25:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:25:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-04 16:25:28,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-04 16:25:28,171 INFO L175 Difference]: Start difference. First operand has 400 places, 480 transitions, 5711 flow. Second operand 9 states and 220 transitions. [2024-06-04 16:25:28,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 521 transitions, 7202 flow [2024-06-04 16:25:33,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 521 transitions, 6842 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-04 16:25:33,517 INFO L231 Difference]: Finished difference. Result has 400 places, 482 transitions, 5666 flow [2024-06-04 16:25:33,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5351, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5666, PETRI_PLACES=400, PETRI_TRANSITIONS=482} [2024-06-04 16:25:33,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-04 16:25:33,518 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 482 transitions, 5666 flow [2024-06-04 16:25:33,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:33,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:25:33,518 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 16:25:33,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 16:25:33,518 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 16:25:33,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:25:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1831691311, now seen corresponding path program 3 times [2024-06-04 16:25:33,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:25:33,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671588963] [2024-06-04 16:25:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:25:33,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:25:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:25:33,707 INFO 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 16:25:33,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:25:33,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671588963] [2024-06-04 16:25:33,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671588963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:25:33,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:25:33,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:25:33,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731927874] [2024-06-04 16:25:33,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:25:33,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:25:33,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:25:33,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:25:33,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:25:33,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:25:33,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 482 transitions, 5666 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:33,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:25:33,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:25:33,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:25:35,358 INFO L124 PetriNetUnfolderBase]: 4662/8083 cut-off events. [2024-06-04 16:25:35,359 INFO L125 PetriNetUnfolderBase]: For 713311/713311 co-relation queries the response was YES. [2024-06-04 16:25:35,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44136 conditions, 8083 events. 4662/8083 cut-off events. For 713311/713311 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 59065 event pairs, 1053 based on Foata normal form. 12/8094 useless extension candidates. Maximal degree in co-relation 43943. Up to 5856 conditions per place. [2024-06-04 16:25:35,483 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 387 selfloop transitions, 131 changer transitions 0/525 dead transitions. [2024-06-04 16:25:35,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 525 transitions, 7124 flow [2024-06-04 16:25:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:25:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:25:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-04 16:25:35,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-04 16:25:35,485 INFO L175 Difference]: Start difference. First operand has 400 places, 482 transitions, 5666 flow. Second operand 9 states and 226 transitions. [2024-06-04 16:25:35,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 525 transitions, 7124 flow [2024-06-04 16:25:41,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 525 transitions, 6560 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-06-04 16:25:41,648 INFO L231 Difference]: Finished difference. Result has 399 places, 482 transitions, 5370 flow [2024-06-04 16:25:41,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5370, PETRI_PLACES=399, PETRI_TRANSITIONS=482} [2024-06-04 16:25:41,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-04 16:25:41,649 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 482 transitions, 5370 flow [2024-06-04 16:25:41,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:41,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:25:41,649 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 16:25:41,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 16:25:41,650 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 16:25:41,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:25:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1552278117, now seen corresponding path program 4 times [2024-06-04 16:25:41,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:25:41,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733615315] [2024-06-04 16:25:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:25:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:25:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:25:41,843 INFO 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 16:25:41,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:25:41,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733615315] [2024-06-04 16:25:41,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733615315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:25:41,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:25:41,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:25:41,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479946892] [2024-06-04 16:25:41,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:25:41,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:25:41,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:25:41,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:25:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:25:41,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:25:41,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 482 transitions, 5370 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:41,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:25:41,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:25:41,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:25:43,497 INFO L124 PetriNetUnfolderBase]: 4649/8047 cut-off events. [2024-06-04 16:25:43,497 INFO L125 PetriNetUnfolderBase]: For 587820/587820 co-relation queries the response was YES. [2024-06-04 16:25:43,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41708 conditions, 8047 events. 4649/8047 cut-off events. For 587820/587820 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 58708 event pairs, 1279 based on Foata normal form. 6/8045 useless extension candidates. Maximal degree in co-relation 41517. Up to 7083 conditions per place. [2024-06-04 16:25:43,605 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 411 selfloop transitions, 93 changer transitions 1/512 dead transitions. [2024-06-04 16:25:43,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 512 transitions, 6464 flow [2024-06-04 16:25:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:25:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:25:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 16:25:43,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-04 16:25:43,606 INFO L175 Difference]: Start difference. First operand has 399 places, 482 transitions, 5370 flow. Second operand 8 states and 197 transitions. [2024-06-04 16:25:43,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 512 transitions, 6464 flow [2024-06-04 16:25:47,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 512 transitions, 6161 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:25:47,791 INFO L231 Difference]: Finished difference. Result has 399 places, 482 transitions, 5257 flow [2024-06-04 16:25:47,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5257, PETRI_PLACES=399, PETRI_TRANSITIONS=482} [2024-06-04 16:25:47,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-04 16:25:47,792 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 482 transitions, 5257 flow [2024-06-04 16:25:47,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:47,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:25:47,792 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 16:25:47,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 16:25:47,793 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 16:25:47,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:25:47,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1817975397, now seen corresponding path program 5 times [2024-06-04 16:25:47,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:25:47,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882301462] [2024-06-04 16:25:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:25:47,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:25:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:25:47,999 INFO 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 16:25:47,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:25:48,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882301462] [2024-06-04 16:25:48,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882301462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:25:48,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:25:48,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:25:48,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425688857] [2024-06-04 16:25:48,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:25:48,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:25:48,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:25:48,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:25:48,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:25:48,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:25:48,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 482 transitions, 5257 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:48,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:25:48,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:25:48,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:25:49,636 INFO L124 PetriNetUnfolderBase]: 4669/8059 cut-off events. [2024-06-04 16:25:49,636 INFO L125 PetriNetUnfolderBase]: For 592791/592791 co-relation queries the response was YES. [2024-06-04 16:25:49,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41196 conditions, 8059 events. 4669/8059 cut-off events. For 592791/592791 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 58661 event pairs, 1251 based on Foata normal form. 6/8051 useless extension candidates. Maximal degree in co-relation 41004. Up to 6881 conditions per place. [2024-06-04 16:25:49,974 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 397 selfloop transitions, 108 changer transitions 0/512 dead transitions. [2024-06-04 16:25:49,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 512 transitions, 6377 flow [2024-06-04 16:25:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:25:49,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:25:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:25:49,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-04 16:25:49,982 INFO L175 Difference]: Start difference. First operand has 399 places, 482 transitions, 5257 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:25:49,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 512 transitions, 6377 flow [2024-06-04 16:25:55,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 512 transitions, 6165 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 16:25:55,054 INFO L231 Difference]: Finished difference. Result has 399 places, 483 transitions, 5291 flow [2024-06-04 16:25:55,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5291, PETRI_PLACES=399, PETRI_TRANSITIONS=483} [2024-06-04 16:25:55,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-04 16:25:55,054 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 483 transitions, 5291 flow [2024-06-04 16:25:55,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:55,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:25:55,055 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 16:25:55,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 16:25:55,055 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 16:25:55,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:25:55,055 INFO L85 PathProgramCache]: Analyzing trace with hash 480483941, now seen corresponding path program 6 times [2024-06-04 16:25:55,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:25:55,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459452618] [2024-06-04 16:25:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:25:55,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:25:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:25:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:25:55,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:25:55,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459452618] [2024-06-04 16:25:55,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459452618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:25:55,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:25:55,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:25:55,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99293423] [2024-06-04 16:25:55,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:25:55,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:25:55,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:25:55,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:25:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:25:55,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:25:55,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 483 transitions, 5291 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:25:55,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:25:55,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:25:55,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:25:56,932 INFO L124 PetriNetUnfolderBase]: 4689/8158 cut-off events. [2024-06-04 16:25:56,933 INFO L125 PetriNetUnfolderBase]: For 601104/601104 co-relation queries the response was YES. [2024-06-04 16:25:57,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41628 conditions, 8158 events. 4689/8158 cut-off events. For 601104/601104 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 59914 event pairs, 1019 based on Foata normal form. 6/8162 useless extension candidates. Maximal degree in co-relation 41435. Up to 5703 conditions per place. [2024-06-04 16:25:57,048 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 375 selfloop transitions, 139 changer transitions 0/521 dead transitions. [2024-06-04 16:25:57,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 521 transitions, 6757 flow [2024-06-04 16:25:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:25:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:25:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 16:25:57,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:25:57,049 INFO L175 Difference]: Start difference. First operand has 399 places, 483 transitions, 5291 flow. Second operand 8 states and 200 transitions. [2024-06-04 16:25:57,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 521 transitions, 6757 flow [2024-06-04 16:26:02,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 521 transitions, 6523 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 16:26:02,145 INFO L231 Difference]: Finished difference. Result has 401 places, 484 transitions, 5365 flow [2024-06-04 16:26:02,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5365, PETRI_PLACES=401, PETRI_TRANSITIONS=484} [2024-06-04 16:26:02,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-04 16:26:02,145 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 484 transitions, 5365 flow [2024-06-04 16:26:02,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:26:02,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:26:02,146 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, 1, 1] [2024-06-04 16:26:02,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 16:26:02,146 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 16:26:02,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:26:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash -315557149, now seen corresponding path program 7 times [2024-06-04 16:26:02,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:26:02,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436246272] [2024-06-04 16:26:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:26:02,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:26:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:26:02,342 INFO 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 16:26:02,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:26:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436246272] [2024-06-04 16:26:02,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436246272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:26:02,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:26:02,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:26:02,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501764665] [2024-06-04 16:26:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:26:02,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:26:02,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:26:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:26:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:26:02,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:26:02,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 484 transitions, 5365 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:26:02,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:26:02,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:26:02,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:26:04,055 INFO L124 PetriNetUnfolderBase]: 4709/8188 cut-off events. [2024-06-04 16:26:04,056 INFO L125 PetriNetUnfolderBase]: For 610883/610883 co-relation queries the response was YES. [2024-06-04 16:26:04,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42281 conditions, 8188 events. 4709/8188 cut-off events. For 610883/610883 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60102 event pairs, 1084 based on Foata normal form. 6/8192 useless extension candidates. Maximal degree in co-relation 42087. Up to 5715 conditions per place. [2024-06-04 16:26:04,166 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 386 selfloop transitions, 127 changer transitions 0/520 dead transitions. [2024-06-04 16:26:04,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 520 transitions, 6827 flow [2024-06-04 16:26:04,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:26:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:26:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:26:04,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:26:04,168 INFO L175 Difference]: Start difference. First operand has 401 places, 484 transitions, 5365 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:26:04,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 520 transitions, 6827 flow [2024-06-04 16:26:10,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 520 transitions, 6559 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 16:26:10,248 INFO L231 Difference]: Finished difference. Result has 404 places, 485 transitions, 5383 flow [2024-06-04 16:26:10,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5098, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5383, PETRI_PLACES=404, PETRI_TRANSITIONS=485} [2024-06-04 16:26:10,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-04 16:26:10,249 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 485 transitions, 5383 flow [2024-06-04 16:26:10,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:26:10,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:26:10,249 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 16:26:10,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 16:26:10,250 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 16:26:10,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:26:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash 687404291, now seen corresponding path program 8 times [2024-06-04 16:26:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:26:10,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81524659] [2024-06-04 16:26:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:26:10,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:26:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:26:10,455 INFO 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 16:26:10,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:26:10,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81524659] [2024-06-04 16:26:10,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81524659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:26:10,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:26:10,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:26:10,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561493030] [2024-06-04 16:26:10,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:26:10,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:26:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:26:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:26:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:26:10,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:26:10,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 485 transitions, 5383 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:26:10,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:26:10,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:26:10,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:26:12,059 INFO L124 PetriNetUnfolderBase]: 4696/8169 cut-off events. [2024-06-04 16:26:12,059 INFO L125 PetriNetUnfolderBase]: For 550636/550636 co-relation queries the response was YES. [2024-06-04 16:26:12,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41202 conditions, 8169 events. 4696/8169 cut-off events. For 550636/550636 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 59992 event pairs, 1084 based on Foata normal form. 6/8173 useless extension candidates. Maximal degree in co-relation 41007. Up to 5709 conditions per place. [2024-06-04 16:26:12,181 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 381 selfloop transitions, 129 changer transitions 0/517 dead transitions. [2024-06-04 16:26:12,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 517 transitions, 6501 flow [2024-06-04 16:26:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:26:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:26:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:26:12,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-04 16:26:12,182 INFO L175 Difference]: Start difference. First operand has 404 places, 485 transitions, 5383 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:26:12,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 517 transitions, 6501 flow [2024-06-04 16:26:17,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 517 transitions, 6180 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 16:26:17,285 INFO L231 Difference]: Finished difference. Result has 406 places, 485 transitions, 5324 flow [2024-06-04 16:26:17,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5324, PETRI_PLACES=406, PETRI_TRANSITIONS=485} [2024-06-04 16:26:17,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-04 16:26:17,286 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 485 transitions, 5324 flow [2024-06-04 16:26:17,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:26:17,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:26:17,286 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, 1] [2024-06-04 16:26:17,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 16:26:17,286 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 16:26:17,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:26:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1280836979, now seen corresponding path program 1 times [2024-06-04 16:26:17,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:26:17,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133604735] [2024-06-04 16:26:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:26:17,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:26:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:26:17,497 INFO 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 16:26:17,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:26:17,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133604735] [2024-06-04 16:26:17,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133604735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:26:17,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:26:17,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:26:17,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567410765] [2024-06-04 16:26:17,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:26:17,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:26:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:26:17,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:26:17,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:26:17,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:26:17,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 485 transitions, 5324 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:26:17,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:26:17,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:26:17,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:26:19,397 INFO L124 PetriNetUnfolderBase]: 5117/8891 cut-off events. [2024-06-04 16:26:19,398 INFO L125 PetriNetUnfolderBase]: For 1523237/1523237 co-relation queries the response was YES. [2024-06-04 16:26:19,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54332 conditions, 8891 events. 5117/8891 cut-off events. For 1523237/1523237 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 66190 event pairs, 1131 based on Foata normal form. 24/8914 useless extension candidates. Maximal degree in co-relation 54136. Up to 4323 conditions per place. [2024-06-04 16:26:19,548 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 359 selfloop transitions, 167 changer transitions 6/539 dead transitions. [2024-06-04 16:26:19,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 539 transitions, 7316 flow [2024-06-04 16:26:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:26:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:26:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-04 16:26:19,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-04 16:26:19,549 INFO L175 Difference]: Start difference. First operand has 406 places, 485 transitions, 5324 flow. Second operand 9 states and 232 transitions. [2024-06-04 16:26:19,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 539 transitions, 7316 flow [2024-06-04 16:26:29,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 539 transitions, 7053 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:26:29,029 INFO L231 Difference]: Finished difference. Result has 409 places, 485 transitions, 5562 flow [2024-06-04 16:26:29,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5562, PETRI_PLACES=409, PETRI_TRANSITIONS=485} [2024-06-04 16:26:29,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-04 16:26:29,029 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 485 transitions, 5562 flow [2024-06-04 16:26:29,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:26:29,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:26:29,030 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, 1] [2024-06-04 16:26:29,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 16:26:29,030 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 16:26:29,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:26:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash -337496665, now seen corresponding path program 2 times [2024-06-04 16:26:29,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:26:29,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066664035] [2024-06-04 16:26:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:26:29,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:26:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:26:29,244 INFO 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 16:26:29,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:26:29,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066664035] [2024-06-04 16:26:29,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066664035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:26:29,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:26:29,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:26:29,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240762649] [2024-06-04 16:26:29,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:26:29,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:26:29,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:26:29,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:26:29,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:26:29,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:26:29,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 485 transitions, 5562 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:26:29,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:26:29,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:26:29,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:26:31,223 INFO L124 PetriNetUnfolderBase]: 5198/8988 cut-off events. [2024-06-04 16:26:31,223 INFO L125 PetriNetUnfolderBase]: For 1758254/1758254 co-relation queries the response was YES. [2024-06-04 16:26:31,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62092 conditions, 8988 events. 5198/8988 cut-off events. For 1758254/1758254 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 66697 event pairs, 1244 based on Foata normal form. 6/8993 useless extension candidates. Maximal degree in co-relation 61894. Up to 4323 conditions per place. [2024-06-04 16:26:31,361 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 350 selfloop transitions, 179 changer transitions 0/536 dead transitions. [2024-06-04 16:26:31,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 536 transitions, 7552 flow [2024-06-04 16:26:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:26:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:26:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-04 16:26:31,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-04 16:26:31,362 INFO L175 Difference]: Start difference. First operand has 409 places, 485 transitions, 5562 flow. Second operand 9 states and 232 transitions. [2024-06-04 16:26:31,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 536 transitions, 7552 flow [2024-06-04 16:26:44,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 536 transitions, 7286 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 16:26:44,398 INFO L231 Difference]: Finished difference. Result has 413 places, 487 transitions, 5773 flow [2024-06-04 16:26:44,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5773, PETRI_PLACES=413, PETRI_TRANSITIONS=487} [2024-06-04 16:26:44,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-04 16:26:44,398 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 487 transitions, 5773 flow [2024-06-04 16:26:44,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:26:44,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:26:44,399 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, 1] [2024-06-04 16:26:44,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 16:26:44,399 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 16:26:44,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:26:44,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1154676529, now seen corresponding path program 3 times [2024-06-04 16:26:44,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:26:44,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890248090] [2024-06-04 16:26:44,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:26:44,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:26:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:26:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:26:44,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:26:44,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890248090] [2024-06-04 16:26:44,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890248090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:26:44,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:26:44,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:26:44,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092398002] [2024-06-04 16:26:44,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:26:44,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:26:44,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:26:44,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:26:44,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:26:44,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:26:44,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 487 transitions, 5773 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:26:44,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:26:44,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:26:44,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:26:46,621 INFO L124 PetriNetUnfolderBase]: 5185/8989 cut-off events. [2024-06-04 16:26:46,622 INFO L125 PetriNetUnfolderBase]: For 1716555/1716555 co-relation queries the response was YES. [2024-06-04 16:26:46,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61409 conditions, 8989 events. 5185/8989 cut-off events. For 1716555/1716555 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 66890 event pairs, 1268 based on Foata normal form. 6/8994 useless extension candidates. Maximal degree in co-relation 61209. Up to 4323 conditions per place. [2024-06-04 16:26:46,783 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 172 changer transitions 0/534 dead transitions. [2024-06-04 16:26:46,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 534 transitions, 7700 flow [2024-06-04 16:26:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:26:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:26:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-04 16:26:46,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-06-04 16:26:46,784 INFO L175 Difference]: Start difference. First operand has 413 places, 487 transitions, 5773 flow. Second operand 9 states and 227 transitions. [2024-06-04 16:26:46,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 534 transitions, 7700 flow [2024-06-04 16:27:01,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 534 transitions, 7276 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 16:27:01,665 INFO L231 Difference]: Finished difference. Result has 416 places, 488 transitions, 5748 flow [2024-06-04 16:27:01,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5748, PETRI_PLACES=416, PETRI_TRANSITIONS=488} [2024-06-04 16:27:01,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-04 16:27:01,666 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 488 transitions, 5748 flow [2024-06-04 16:27:01,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:01,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:27:01,666 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, 1] [2024-06-04 16:27:01,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 16:27:01,666 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 16:27:01,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:27:01,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1302515895, now seen corresponding path program 4 times [2024-06-04 16:27:01,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:27:01,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601042376] [2024-06-04 16:27:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:27:01,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:27:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:27:02,053 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 16:27:02,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:27:02,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601042376] [2024-06-04 16:27:02,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601042376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:27:02,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:27:02,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:27:02,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590884066] [2024-06-04 16:27:02,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:27:02,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:27:02,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:27:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:27:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:27:02,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:27:02,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 488 transitions, 5748 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:02,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:27:02,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:27:02,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:27:03,962 INFO L124 PetriNetUnfolderBase]: 5126/8895 cut-off events. [2024-06-04 16:27:03,962 INFO L125 PetriNetUnfolderBase]: For 1658079/1658079 co-relation queries the response was YES. [2024-06-04 16:27:04,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56043 conditions, 8895 events. 5126/8895 cut-off events. For 1658079/1658079 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 66420 event pairs, 1302 based on Foata normal form. 30/8924 useless extension candidates. Maximal degree in co-relation 55842. Up to 5362 conditions per place. [2024-06-04 16:27:04,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 363 selfloop transitions, 155 changer transitions 7/532 dead transitions. [2024-06-04 16:27:04,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 532 transitions, 7322 flow [2024-06-04 16:27:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:27:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:27:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-04 16:27:04,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-04 16:27:04,100 INFO L175 Difference]: Start difference. First operand has 416 places, 488 transitions, 5748 flow. Second operand 8 states and 211 transitions. [2024-06-04 16:27:04,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 532 transitions, 7322 flow [2024-06-04 16:27:15,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 532 transitions, 6952 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 16:27:15,752 INFO L231 Difference]: Finished difference. Result has 418 places, 485 transitions, 5671 flow [2024-06-04 16:27:15,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5378, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5671, PETRI_PLACES=418, PETRI_TRANSITIONS=485} [2024-06-04 16:27:15,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-04 16:27:15,752 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 485 transitions, 5671 flow [2024-06-04 16:27:15,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:15,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:27:15,753 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, 1] [2024-06-04 16:27:15,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 16:27:15,753 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 16:27:15,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:27:15,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1036492185, now seen corresponding path program 5 times [2024-06-04 16:27:15,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:27:15,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190484438] [2024-06-04 16:27:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:27:15,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:27:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:27:15,982 INFO 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 16:27:15,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:27:15,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190484438] [2024-06-04 16:27:15,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190484438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:27:15,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:27:15,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:27:15,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554377809] [2024-06-04 16:27:15,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:27:15,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:27:15,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:27:15,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:27:15,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:27:16,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:27:16,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 485 transitions, 5671 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:16,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:27:16,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:27:16,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:27:18,327 INFO L124 PetriNetUnfolderBase]: 4907/8508 cut-off events. [2024-06-04 16:27:18,327 INFO L125 PetriNetUnfolderBase]: For 1341211/1341211 co-relation queries the response was YES. [2024-06-04 16:27:18,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49348 conditions, 8508 events. 4907/8508 cut-off events. For 1341211/1341211 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 62878 event pairs, 1430 based on Foata normal form. 34/8541 useless extension candidates. Maximal degree in co-relation 49146. Up to 7212 conditions per place. [2024-06-04 16:27:18,447 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 381 selfloop transitions, 124 changer transitions 1/513 dead transitions. [2024-06-04 16:27:18,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 513 transitions, 6821 flow [2024-06-04 16:27:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:27:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:27:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:27:18,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-04 16:27:18,449 INFO L175 Difference]: Start difference. First operand has 418 places, 485 transitions, 5671 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:27:18,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 513 transitions, 6821 flow [2024-06-04 16:27:27,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 513 transitions, 6459 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 16:27:27,570 INFO L231 Difference]: Finished difference. Result has 417 places, 485 transitions, 5612 flow [2024-06-04 16:27:27,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5309, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5612, PETRI_PLACES=417, PETRI_TRANSITIONS=485} [2024-06-04 16:27:27,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-04 16:27:27,570 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 485 transitions, 5612 flow [2024-06-04 16:27:27,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:27,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:27:27,571 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, 1] [2024-06-04 16:27:27,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 16:27:27,571 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 16:27:27,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:27:27,571 INFO L85 PathProgramCache]: Analyzing trace with hash -391984527, now seen corresponding path program 6 times [2024-06-04 16:27:27,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:27:27,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497591252] [2024-06-04 16:27:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:27:27,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:27:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:27:27,775 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 16:27:27,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:27:27,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497591252] [2024-06-04 16:27:27,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497591252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:27:27,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:27:27,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:27:27,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568289196] [2024-06-04 16:27:27,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:27:27,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:27:27,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:27:27,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:27:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:27:27,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:27:27,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 485 transitions, 5612 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:27,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:27:27,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:27:27,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:27:30,209 INFO L124 PetriNetUnfolderBase]: 4985/8660 cut-off events. [2024-06-04 16:27:30,210 INFO L125 PetriNetUnfolderBase]: For 1294033/1294033 co-relation queries the response was YES. [2024-06-04 16:27:30,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49620 conditions, 8660 events. 4985/8660 cut-off events. For 1294033/1294033 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 64391 event pairs, 1420 based on Foata normal form. 30/8689 useless extension candidates. Maximal degree in co-relation 49418. Up to 6952 conditions per place. [2024-06-04 16:27:30,334 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 132 changer transitions 5/519 dead transitions. [2024-06-04 16:27:30,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 519 transitions, 6810 flow [2024-06-04 16:27:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:27:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:27:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 16:27:30,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-04 16:27:30,336 INFO L175 Difference]: Start difference. First operand has 417 places, 485 transitions, 5612 flow. Second operand 8 states and 203 transitions. [2024-06-04 16:27:30,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 519 transitions, 6810 flow [2024-06-04 16:27:38,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 519 transitions, 6533 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:27:38,263 INFO L231 Difference]: Finished difference. Result has 419 places, 483 transitions, 5637 flow [2024-06-04 16:27:38,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5335, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5637, PETRI_PLACES=419, PETRI_TRANSITIONS=483} [2024-06-04 16:27:38,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-04 16:27:38,267 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 483 transitions, 5637 flow [2024-06-04 16:27:38,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:38,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:27:38,268 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, 1] [2024-06-04 16:27:38,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 16:27:38,268 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 16:27:38,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:27:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1491730097, now seen corresponding path program 7 times [2024-06-04 16:27:38,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:27:38,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274741808] [2024-06-04 16:27:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:27:38,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:27:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:27:38,472 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 16:27:38,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:27:38,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274741808] [2024-06-04 16:27:38,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274741808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:27:38,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:27:38,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:27:38,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114704989] [2024-06-04 16:27:38,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:27:38,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:27:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:27:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:27:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:27:38,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:27:38,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 483 transitions, 5637 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:38,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:27:38,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:27:38,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:27:40,591 INFO L124 PetriNetUnfolderBase]: 4783/8306 cut-off events. [2024-06-04 16:27:40,591 INFO L125 PetriNetUnfolderBase]: For 1043820/1043820 co-relation queries the response was YES. [2024-06-04 16:27:40,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48653 conditions, 8306 events. 4783/8306 cut-off events. For 1043820/1043820 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 61261 event pairs, 1405 based on Foata normal form. 8/8313 useless extension candidates. Maximal degree in co-relation 48450. Up to 7244 conditions per place. [2024-06-04 16:27:40,716 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 139 changer transitions 0/512 dead transitions. [2024-06-04 16:27:40,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 512 transitions, 6785 flow [2024-06-04 16:27:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:27:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:27:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-04 16:27:40,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 16:27:40,718 INFO L175 Difference]: Start difference. First operand has 419 places, 483 transitions, 5637 flow. Second operand 11 states and 252 transitions. [2024-06-04 16:27:40,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 512 transitions, 6785 flow [2024-06-04 16:27:47,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 512 transitions, 6461 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 16:27:47,853 INFO L231 Difference]: Finished difference. Result has 423 places, 484 transitions, 5660 flow [2024-06-04 16:27:47,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5660, PETRI_PLACES=423, PETRI_TRANSITIONS=484} [2024-06-04 16:27:47,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-04 16:27:47,853 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 484 transitions, 5660 flow [2024-06-04 16:27:47,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:47,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:27:47,854 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, 1] [2024-06-04 16:27:47,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 16:27:47,854 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 16:27:47,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:27:47,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1594518951, now seen corresponding path program 8 times [2024-06-04 16:27:47,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:27:47,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051014627] [2024-06-04 16:27:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:27:47,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:27:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:27:48,102 INFO 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 16:27:48,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:27:48,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051014627] [2024-06-04 16:27:48,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051014627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:27:48,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:27:48,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:27:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875456085] [2024-06-04 16:27:48,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:27:48,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:27:48,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:27:48,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:27:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:27:48,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:27:48,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 484 transitions, 5660 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:48,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:27:48,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:27:48,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:27:50,259 INFO L124 PetriNetUnfolderBase]: 4915/8502 cut-off events. [2024-06-04 16:27:50,259 INFO L125 PetriNetUnfolderBase]: For 1280571/1280571 co-relation queries the response was YES. [2024-06-04 16:27:50,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53929 conditions, 8502 events. 4915/8502 cut-off events. For 1280571/1280571 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 62853 event pairs, 1189 based on Foata normal form. 6/8507 useless extension candidates. Maximal degree in co-relation 53726. Up to 6512 conditions per place. [2024-06-04 16:27:50,387 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 191 changer transitions 0/526 dead transitions. [2024-06-04 16:27:50,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 526 transitions, 7618 flow [2024-06-04 16:27:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:27:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:27:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-04 16:27:50,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-04 16:27:50,388 INFO L175 Difference]: Start difference. First operand has 423 places, 484 transitions, 5660 flow. Second operand 11 states and 259 transitions. [2024-06-04 16:27:50,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 526 transitions, 7618 flow [2024-06-04 16:27:57,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 526 transitions, 7303 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-04 16:27:57,984 INFO L231 Difference]: Finished difference. Result has 425 places, 487 transitions, 5907 flow [2024-06-04 16:27:57,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5345, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5907, PETRI_PLACES=425, PETRI_TRANSITIONS=487} [2024-06-04 16:27:57,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-04 16:27:57,985 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 487 transitions, 5907 flow [2024-06-04 16:27:57,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:57,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:27:57,986 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, 1] [2024-06-04 16:27:57,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 16:27:57,986 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 16:27:57,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:27:57,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1682847561, now seen corresponding path program 9 times [2024-06-04 16:27:57,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:27:57,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009740171] [2024-06-04 16:27:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:27:57,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:27:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:27:58,192 INFO 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 16:27:58,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:27:58,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009740171] [2024-06-04 16:27:58,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009740171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:27:58,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:27:58,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:27:58,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832838043] [2024-06-04 16:27:58,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:27:58,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:27:58,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:27:58,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:27:58,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:27:58,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:27:58,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 487 transitions, 5907 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:27:58,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:27:58,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:27:58,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:28:00,465 INFO L124 PetriNetUnfolderBase]: 4902/8479 cut-off events. [2024-06-04 16:28:00,466 INFO L125 PetriNetUnfolderBase]: For 1219511/1219511 co-relation queries the response was YES. [2024-06-04 16:28:00,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53018 conditions, 8479 events. 4902/8479 cut-off events. For 1219511/1219511 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 62549 event pairs, 1426 based on Foata normal form. 6/8484 useless extension candidates. Maximal degree in co-relation 52814. Up to 7261 conditions per place. [2024-06-04 16:28:00,728 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 148 changer transitions 0/521 dead transitions. [2024-06-04 16:28:00,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 521 transitions, 7465 flow [2024-06-04 16:28:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:28:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:28:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-04 16:28:00,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:28:00,729 INFO L175 Difference]: Start difference. First operand has 425 places, 487 transitions, 5907 flow. Second operand 11 states and 253 transitions. [2024-06-04 16:28:00,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 521 transitions, 7465 flow [2024-06-04 16:28:07,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 521 transitions, 7172 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-04 16:28:07,962 INFO L231 Difference]: Finished difference. Result has 431 places, 489 transitions, 6074 flow [2024-06-04 16:28:07,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6074, PETRI_PLACES=431, PETRI_TRANSITIONS=489} [2024-06-04 16:28:07,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-04 16:28:07,963 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 489 transitions, 6074 flow [2024-06-04 16:28:07,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:28:07,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:28:07,963 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, 1] [2024-06-04 16:28:07,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 16:28:07,963 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 16:28:07,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:28:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1402837907, now seen corresponding path program 10 times [2024-06-04 16:28:07,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:28:07,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384403401] [2024-06-04 16:28:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:28:07,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:28:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:28:08,176 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 16:28:08,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:28:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384403401] [2024-06-04 16:28:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384403401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:28:08,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:28:08,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:28:08,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158608840] [2024-06-04 16:28:08,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:28:08,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:28:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:28:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:28:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:28:08,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:28:08,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 489 transitions, 6074 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:28:08,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:28:08,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:28:08,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:28:10,400 INFO L124 PetriNetUnfolderBase]: 4889/8464 cut-off events. [2024-06-04 16:28:10,400 INFO L125 PetriNetUnfolderBase]: For 1144501/1144501 co-relation queries the response was YES. [2024-06-04 16:28:10,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51687 conditions, 8464 events. 4889/8464 cut-off events. For 1144501/1144501 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 62613 event pairs, 1163 based on Foata normal form. 6/8469 useless extension candidates. Maximal degree in co-relation 51480. Up to 6500 conditions per place. [2024-06-04 16:28:10,528 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 334 selfloop transitions, 187 changer transitions 0/528 dead transitions. [2024-06-04 16:28:10,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 528 transitions, 7880 flow [2024-06-04 16:28:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:28:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:28:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-04 16:28:10,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-04 16:28:10,529 INFO L175 Difference]: Start difference. First operand has 431 places, 489 transitions, 6074 flow. Second operand 11 states and 259 transitions. [2024-06-04 16:28:10,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 528 transitions, 7880 flow [2024-06-04 16:28:16,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 528 transitions, 7550 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-04 16:28:16,309 INFO L231 Difference]: Finished difference. Result has 434 places, 489 transitions, 6124 flow [2024-06-04 16:28:16,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5744, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6124, PETRI_PLACES=434, PETRI_TRANSITIONS=489} [2024-06-04 16:28:16,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 16:28:16,309 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 489 transitions, 6124 flow [2024-06-04 16:28:16,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:28:16,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:28:16,310 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, 1] [2024-06-04 16:28:16,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 16:28:16,310 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 16:28:16,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:28:16,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1881541091, now seen corresponding path program 11 times [2024-06-04 16:28:16,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:28:16,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037071716] [2024-06-04 16:28:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:28:16,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:28:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:28:16,516 INFO 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 16:28:16,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:28:16,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037071716] [2024-06-04 16:28:16,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037071716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:28:16,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:28:16,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:28:16,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260089428] [2024-06-04 16:28:16,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:28:16,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:28:16,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:28:16,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:28:16,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:28:16,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:28:16,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 489 transitions, 6124 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:28:16,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:28:16,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:28:16,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:28:18,760 INFO L124 PetriNetUnfolderBase]: 4871/8450 cut-off events. [2024-06-04 16:28:18,760 INFO L125 PetriNetUnfolderBase]: For 1078991/1078991 co-relation queries the response was YES. [2024-06-04 16:28:18,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50202 conditions, 8450 events. 4871/8450 cut-off events. For 1078991/1078991 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 62534 event pairs, 1275 based on Foata normal form. 8/8457 useless extension candidates. Maximal degree in co-relation 49994. Up to 7072 conditions per place. [2024-06-04 16:28:18,884 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 169 changer transitions 0/525 dead transitions. [2024-06-04 16:28:18,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 525 transitions, 7598 flow [2024-06-04 16:28:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:28:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:28:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 277 transitions. [2024-06-04 16:28:18,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496031746031746 [2024-06-04 16:28:18,885 INFO L175 Difference]: Start difference. First operand has 434 places, 489 transitions, 6124 flow. Second operand 12 states and 277 transitions. [2024-06-04 16:28:18,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 525 transitions, 7598 flow [2024-06-04 16:28:26,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 525 transitions, 7116 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-04 16:28:26,801 INFO L231 Difference]: Finished difference. Result has 436 places, 489 transitions, 5988 flow [2024-06-04 16:28:26,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5642, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5988, PETRI_PLACES=436, PETRI_TRANSITIONS=489} [2024-06-04 16:28:26,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-04 16:28:26,801 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 489 transitions, 5988 flow [2024-06-04 16:28:26,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:28:26,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:28:26,802 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, 1] [2024-06-04 16:28:26,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 16:28:26,802 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 16:28:26,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:28:26,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1878684131, now seen corresponding path program 12 times [2024-06-04 16:28:26,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:28:26,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323820069] [2024-06-04 16:28:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:28:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:28:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:28:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:28:27,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:28:27,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323820069] [2024-06-04 16:28:27,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323820069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:28:27,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:28:27,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:28:27,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095361017] [2024-06-04 16:28:27,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:28:27,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:28:27,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:28:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:28:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:28:27,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:28:27,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 489 transitions, 5988 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:28:27,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:28:27,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:28:27,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:28:29,146 INFO L124 PetriNetUnfolderBase]: 4853/8424 cut-off events. [2024-06-04 16:28:29,146 INFO L125 PetriNetUnfolderBase]: For 988686/988686 co-relation queries the response was YES. [2024-06-04 16:28:29,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48021 conditions, 8424 events. 4853/8424 cut-off events. For 988686/988686 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 62383 event pairs, 1421 based on Foata normal form. 8/8431 useless extension candidates. Maximal degree in co-relation 47813. Up to 7364 conditions per place. [2024-06-04 16:28:29,273 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 151 changer transitions 0/518 dead transitions. [2024-06-04 16:28:29,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 518 transitions, 7094 flow [2024-06-04 16:28:29,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:28:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:28:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 271 transitions. [2024-06-04 16:28:29,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5376984126984127 [2024-06-04 16:28:29,275 INFO L175 Difference]: Start difference. First operand has 436 places, 489 transitions, 5988 flow. Second operand 12 states and 271 transitions. [2024-06-04 16:28:29,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 518 transitions, 7094 flow [2024-06-04 16:28:36,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 518 transitions, 6572 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-04 16:28:36,936 INFO L231 Difference]: Finished difference. Result has 436 places, 489 transitions, 5777 flow [2024-06-04 16:28:36,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5466, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5777, PETRI_PLACES=436, PETRI_TRANSITIONS=489} [2024-06-04 16:28:36,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-04 16:28:36,937 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 489 transitions, 5777 flow [2024-06-04 16:28:36,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:28:36,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:28:36,937 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, 1, 1, 1] [2024-06-04 16:28:36,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 16:28:36,937 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 16:28:36,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:28:36,938 INFO L85 PathProgramCache]: Analyzing trace with hash 380949735, now seen corresponding path program 13 times [2024-06-04 16:28:36,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:28:36,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888126590] [2024-06-04 16:28:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:28:36,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:28:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:28:37,181 INFO 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 16:28:37,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:28:37,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888126590] [2024-06-04 16:28:37,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888126590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:28:37,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:28:37,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:28:37,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054246042] [2024-06-04 16:28:37,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:28:37,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:28:37,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:28:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:28:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:28:37,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:28:37,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 489 transitions, 5777 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:28:37,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:28:37,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:28:37,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:28:39,597 INFO L124 PetriNetUnfolderBase]: 5101/8841 cut-off events. [2024-06-04 16:28:39,598 INFO L125 PetriNetUnfolderBase]: For 1699320/1699320 co-relation queries the response was YES. [2024-06-04 16:28:39,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54751 conditions, 8841 events. 5101/8841 cut-off events. For 1699320/1699320 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 65901 event pairs, 1494 based on Foata normal form. 30/8870 useless extension candidates. Maximal degree in co-relation 54542. Up to 4665 conditions per place. [2024-06-04 16:28:39,724 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 172 changer transitions 15/540 dead transitions. [2024-06-04 16:28:39,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 540 transitions, 7455 flow [2024-06-04 16:28:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:28:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:28:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-04 16:28:39,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:28:39,726 INFO L175 Difference]: Start difference. First operand has 436 places, 489 transitions, 5777 flow. Second operand 10 states and 250 transitions. [2024-06-04 16:28:39,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 540 transitions, 7455 flow [2024-06-04 16:28:48,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 540 transitions, 7122 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-04 16:28:48,806 INFO L231 Difference]: Finished difference. Result has 435 places, 481 transitions, 5765 flow [2024-06-04 16:28:48,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5444, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5765, PETRI_PLACES=435, PETRI_TRANSITIONS=481} [2024-06-04 16:28:48,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-04 16:28:48,806 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 481 transitions, 5765 flow [2024-06-04 16:28:48,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:28:48,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:28:48,807 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, 1] [2024-06-04 16:28:48,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 16:28:48,807 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 16:28:48,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:28:48,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1079569565, now seen corresponding path program 14 times [2024-06-04 16:28:48,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:28:48,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905962033] [2024-06-04 16:28:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:28:48,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:28:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:28:49,008 INFO 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 16:28:49,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:28:49,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905962033] [2024-06-04 16:28:49,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905962033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:28:49,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:28:49,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:28:49,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040426116] [2024-06-04 16:28:49,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:28:49,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:28:49,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:28:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:28:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:28:49,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:28:49,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 481 transitions, 5765 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:28:49,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:28:49,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:28:49,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:28:51,511 INFO L124 PetriNetUnfolderBase]: 5056/8831 cut-off events. [2024-06-04 16:28:51,511 INFO L125 PetriNetUnfolderBase]: For 2181506/2181506 co-relation queries the response was YES. [2024-06-04 16:28:51,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60975 conditions, 8831 events. 5056/8831 cut-off events. For 2181506/2181506 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 66601 event pairs, 1563 based on Foata normal form. 30/8860 useless extension candidates. Maximal degree in co-relation 60765. Up to 7026 conditions per place. [2024-06-04 16:28:51,711 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 334 selfloop transitions, 179 changer transitions 5/525 dead transitions. [2024-06-04 16:28:51,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 525 transitions, 7387 flow [2024-06-04 16:28:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:28:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:28:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-04 16:28:51,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:28:51,713 INFO L175 Difference]: Start difference. First operand has 435 places, 481 transitions, 5765 flow. Second operand 10 states and 245 transitions. [2024-06-04 16:28:51,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 525 transitions, 7387 flow [2024-06-04 16:29:03,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 525 transitions, 6970 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-04 16:29:03,765 INFO L231 Difference]: Finished difference. Result has 437 places, 481 transitions, 5812 flow [2024-06-04 16:29:03,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5348, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5812, PETRI_PLACES=437, PETRI_TRANSITIONS=481} [2024-06-04 16:29:03,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-04 16:29:03,766 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 481 transitions, 5812 flow [2024-06-04 16:29:03,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:03,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:29:03,766 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, 1] [2024-06-04 16:29:03,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 16:29:03,767 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 16:29:03,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:29:03,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2067109695, now seen corresponding path program 15 times [2024-06-04 16:29:03,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:29:03,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138089361] [2024-06-04 16:29:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:29:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:29:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:29:03,965 INFO 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 16:29:03,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:29:03,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138089361] [2024-06-04 16:29:03,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138089361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:29:03,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:29:03,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:29:03,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121252470] [2024-06-04 16:29:03,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:29:03,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:29:03,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:29:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:29:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:29:04,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:29:04,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 481 transitions, 5812 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:29:04,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:29:04,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:29:04,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:29:06,088 INFO L124 PetriNetUnfolderBase]: 4787/8388 cut-off events. [2024-06-04 16:29:06,088 INFO L125 PetriNetUnfolderBase]: For 1377561/1377561 co-relation queries the response was YES. [2024-06-04 16:29:06,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47870 conditions, 8388 events. 4787/8388 cut-off events. For 1377561/1377561 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 62809 event pairs, 1458 based on Foata normal form. 34/8421 useless extension candidates. Maximal degree in co-relation 47659. Up to 6954 conditions per place. Killed by 15