./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe036.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/safe036.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/safe036.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe036.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:50:41,303 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:50:41,334 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:50:41,336 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:50:41,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:50:41,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:50:41,350 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:50:41,350 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:50:41,351 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:50:41,351 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:50:41,351 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:50:41,352 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:50:41,352 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:50:41,352 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:50:41,353 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:50:41,353 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:50:41,353 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:50:41,353 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:50:41,354 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:50:41,354 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:50:41,354 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:50:41,355 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:50:41,355 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:50:41,355 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:50:41,355 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:50:41,355 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:50:41,356 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:50:41,356 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:50:41,356 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:50:41,356 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:50:41,357 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:50:41,357 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:50:41,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:50:41,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:50:41,357 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:50:41,357 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:50:41,358 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:50:41,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:50:41,358 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:50:41,358 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:50:41,358 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:50:41,359 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:50:41,359 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:50:41,359 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:50:41,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:50:41,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:50:41,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:50:41,541 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:50:41,541 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:50:41,542 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-03 20:50:42,610 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:50:42,765 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:50:42,766 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-03 20:50:42,776 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de1b3df28/9e3e73cfbd7b44f0a1bda0b29964f453/FLAG545f24589 [2024-06-03 20:50:42,788 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de1b3df28/9e3e73cfbd7b44f0a1bda0b29964f453 [2024-06-03 20:50:42,790 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:50:42,790 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:50:42,790 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe036.yml/witness.yml [2024-06-03 20:50:42,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:50:42,885 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:50:42,900 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:50:42,900 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:50:42,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:50:42,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:50:42" (1/2) ... [2024-06-03 20:50:42,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd73d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:50:42, skipping insertion in model container [2024-06-03 20:50:42,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:50:42" (1/2) ... [2024-06-03 20:50:42,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e50ca67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:50:42, skipping insertion in model container [2024-06-03 20:50:42,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:50:42" (2/2) ... [2024-06-03 20:50:42,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd73d87 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:42, skipping insertion in model container [2024-06-03 20:50:42,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:50:42" (2/2) ... [2024-06-03 20:50:42,907 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:50:42,935 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:50:42,938 INFO L97 edCorrectnessWitness]: Location invariant before [L767-L767] ((((((! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (1LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-03 20:50:42,939 INFO L97 edCorrectnessWitness]: Location invariant before [L768-L768] ((((((! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (1LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-03 20:50:42,939 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:50:42,939 INFO L106 edCorrectnessWitness]: ghost_update [L765-L765] multithreaded = 1; [2024-06-03 20:50:42,970 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:50:43,261 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:50:43,269 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:50:43,342 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:50:43,368 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:50:43,369 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43 WrapperNode [2024-06-03 20:50:43,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:50:43,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:50:43,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:50:43,370 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:50:43,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,405 INFO L138 Inliner]: procedures = 174, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 57 [2024-06-03 20:50:43,405 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:50:43,406 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:50:43,406 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:50:43,406 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:50:43,414 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,416 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,427 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:50:43,427 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,427 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,431 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,432 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,433 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,434 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,436 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:50:43,436 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:50:43,436 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:50:43,436 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:50:43,437 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (1/1) ... [2024-06-03 20:50:43,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:50:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:50:43,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:50:43,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:50:43,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:50:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:50:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:50:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:50:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:50:43,525 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:50:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:50:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:50:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:50:43,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:50:43,526 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:50:43,621 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:50:43,623 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:50:43,789 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:50:43,795 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:50:43,867 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:50:43,868 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:50:43,868 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:50:43 BoogieIcfgContainer [2024-06-03 20:50:43,868 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:50:43,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:50:43,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:50:43,872 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:50:43,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:50:42" (1/4) ... [2024-06-03 20:50:43,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673c15ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:50:43, skipping insertion in model container [2024-06-03 20:50:43,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:50:42" (2/4) ... [2024-06-03 20:50:43,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673c15ff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:50:43, skipping insertion in model container [2024-06-03 20:50:43,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:50:43" (3/4) ... [2024-06-03 20:50:43,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673c15ff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:50:43, skipping insertion in model container [2024-06-03 20:50:43,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:50:43" (4/4) ... [2024-06-03 20:50:43,875 INFO L112 eAbstractionObserver]: Analyzing ICFG safe036.i [2024-06-03 20:50:43,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:50:43,888 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-03 20:50:43,888 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:50:43,943 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:50:43,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 32 transitions, 72 flow [2024-06-03 20:50:44,001 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2024-06-03 20:50:44,005 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:50:44,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 0/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:50:44,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 32 transitions, 72 flow [2024-06-03 20:50:44,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 24 transitions, 54 flow [2024-06-03 20:50:44,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:50:44,030 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;@1cd741d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:50:44,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-03 20:50:44,038 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:50:44,038 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 20:50:44,038 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:50:44,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:44,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:50:44,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:44,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1644830107, now seen corresponding path program 1 times [2024-06-03 20:50:44,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:44,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616945820] [2024-06-03 20:50:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:44,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:44,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:44,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616945820] [2024-06-03 20:50:44,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616945820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:44,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:44,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:50:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401456524] [2024-06-03 20:50:44,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:44,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:50:44,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:50:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:50:44,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 32 [2024-06-03 20:50:44,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:44,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:44,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 32 [2024-06-03 20:50:44,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:44,741 INFO L124 PetriNetUnfolderBase]: 66/166 cut-off events. [2024-06-03 20:50:44,741 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-03 20:50:44,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 166 events. 66/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 648 event pairs, 33 based on Foata normal form. 1/152 useless extension candidates. Maximal degree in co-relation 297. Up to 124 conditions per place. [2024-06-03 20:50:44,744 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 19 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-06-03 20:50:44,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 113 flow [2024-06-03 20:50:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:50:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:50:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-03 20:50:44,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-03 20:50:44,754 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 54 flow. Second operand 3 states and 66 transitions. [2024-06-03 20:50:44,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 113 flow [2024-06-03 20:50:44,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 20:50:44,757 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 73 flow [2024-06-03 20:50:44,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-03 20:50:44,761 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-03 20:50:44,761 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 73 flow [2024-06-03 20:50:44,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:44,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:44,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:50:44,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:44,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash 133969518, now seen corresponding path program 1 times [2024-06-03 20:50:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786653482] [2024-06-03 20:50:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:44,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:44,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:44,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786653482] [2024-06-03 20:50:44,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786653482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:44,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:44,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:50:44,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254875609] [2024-06-03 20:50:44,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:44,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:50:44,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:44,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:50:44,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:50:44,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 32 [2024-06-03 20:50:44,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:44,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:44,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 32 [2024-06-03 20:50:44,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:45,054 INFO L124 PetriNetUnfolderBase]: 80/183 cut-off events. [2024-06-03 20:50:45,054 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-03 20:50:45,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 183 events. 80/183 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 702 event pairs, 34 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 392. Up to 139 conditions per place. [2024-06-03 20:50:45,057 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 24 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-03 20:50:45,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 157 flow [2024-06-03 20:50:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:50:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:50:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-06-03 20:50:45,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6484375 [2024-06-03 20:50:45,059 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 73 flow. Second operand 4 states and 83 transitions. [2024-06-03 20:50:45,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 157 flow [2024-06-03 20:50:45,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:50:45,062 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 97 flow [2024-06-03 20:50:45,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-06-03 20:50:45,063 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-06-03 20:50:45,064 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 97 flow [2024-06-03 20:50:45,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:45,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:45,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:45,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:50:45,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:45,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:45,067 INFO L85 PathProgramCache]: Analyzing trace with hash -439591465, now seen corresponding path program 1 times [2024-06-03 20:50:45,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:45,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388817152] [2024-06-03 20:50:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:45,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:45,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:45,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388817152] [2024-06-03 20:50:45,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388817152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:45,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:45,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:50:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059974746] [2024-06-03 20:50:45,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:45,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:50:45,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:45,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:50:45,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:50:45,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 32 [2024-06-03 20:50:45,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:45,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:45,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 32 [2024-06-03 20:50:45,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:45,523 INFO L124 PetriNetUnfolderBase]: 79/185 cut-off events. [2024-06-03 20:50:45,523 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-06-03 20:50:45,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 185 events. 79/185 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 697 event pairs, 34 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 443. Up to 145 conditions per place. [2024-06-03 20:50:45,525 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 23 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-03 20:50:45,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 171 flow [2024-06-03 20:50:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:50:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:50:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-06-03 20:50:45,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6171875 [2024-06-03 20:50:45,527 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 97 flow. Second operand 4 states and 79 transitions. [2024-06-03 20:50:45,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 171 flow [2024-06-03 20:50:45,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 162 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 20:50:45,528 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 113 flow [2024-06-03 20:50:45,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2024-06-03 20:50:45,529 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-03 20:50:45,529 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 113 flow [2024-06-03 20:50:45,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:45,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:45,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:45,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:50:45,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:45,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:45,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2027892984, now seen corresponding path program 1 times [2024-06-03 20:50:45,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:45,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008305234] [2024-06-03 20:50:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:45,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:45,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:45,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008305234] [2024-06-03 20:50:45,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008305234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:45,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:45,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:50:45,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419417657] [2024-06-03 20:50:45,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:45,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:50:45,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:50:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:50:45,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:45,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-03 20:50:45,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:45,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:45,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:45,893 INFO L124 PetriNetUnfolderBase]: 95/213 cut-off events. [2024-06-03 20:50:45,893 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-06-03 20:50:45,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 213 events. 95/213 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 795 event pairs, 13 based on Foata normal form. 4/215 useless extension candidates. Maximal degree in co-relation 538. Up to 138 conditions per place. [2024-06-03 20:50:45,895 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 31 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2024-06-03 20:50:45,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 225 flow [2024-06-03 20:50:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:50:45,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:50:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-03 20:50:45,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-03 20:50:45,897 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 113 flow. Second operand 6 states and 111 transitions. [2024-06-03 20:50:45,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 225 flow [2024-06-03 20:50:45,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 216 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 20:50:45,898 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 129 flow [2024-06-03 20:50:45,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-03 20:50:45,899 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-03 20:50:45,899 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 129 flow [2024-06-03 20:50:45,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-03 20:50:45,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:45,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:45,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:50:45,900 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:45,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash -791715360, now seen corresponding path program 1 times [2024-06-03 20:50:45,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:45,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544211810] [2024-06-03 20:50:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:45,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:46,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544211810] [2024-06-03 20:50:46,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544211810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:46,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:46,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:50:46,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739687345] [2024-06-03 20:50:46,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:46,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:50:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:50:46,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:50:46,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:46,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:46,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:46,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:46,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:46,170 INFO L124 PetriNetUnfolderBase]: 98/219 cut-off events. [2024-06-03 20:50:46,171 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-03 20:50:46,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 219 events. 98/219 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 840 event pairs, 25 based on Foata normal form. 1/217 useless extension candidates. Maximal degree in co-relation 602. Up to 160 conditions per place. [2024-06-03 20:50:46,172 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 31 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2024-06-03 20:50:46,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 261 flow [2024-06-03 20:50:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:50:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:50:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-03 20:50:46,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:50:46,174 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 129 flow. Second operand 5 states and 96 transitions. [2024-06-03 20:50:46,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 261 flow [2024-06-03 20:50:46,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 245 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:50:46,175 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 166 flow [2024-06-03 20:50:46,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-03 20:50:46,176 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-03 20:50:46,176 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 166 flow [2024-06-03 20:50:46,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:46,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:46,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:50:46,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:46,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:46,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1526968378, now seen corresponding path program 2 times [2024-06-03 20:50:46,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:46,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198573875] [2024-06-03 20:50:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:46,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:46,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:46,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198573875] [2024-06-03 20:50:46,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198573875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:46,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:46,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:50:46,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152368748] [2024-06-03 20:50:46,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:46,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:50:46,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:50:46,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:50:46,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:46,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:46,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:46,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:46,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:46,482 INFO L124 PetriNetUnfolderBase]: 96/214 cut-off events. [2024-06-03 20:50:46,482 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-06-03 20:50:46,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 214 events. 96/214 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 825 event pairs, 28 based on Foata normal form. 1/211 useless extension candidates. Maximal degree in co-relation 640. Up to 158 conditions per place. [2024-06-03 20:50:46,483 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 27 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2024-06-03 20:50:46,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 254 flow [2024-06-03 20:50:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:50:46,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:50:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-03 20:50:46,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-03 20:50:46,485 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 166 flow. Second operand 5 states and 92 transitions. [2024-06-03 20:50:46,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 254 flow [2024-06-03 20:50:46,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 250 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 20:50:46,487 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 187 flow [2024-06-03 20:50:46,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2024-06-03 20:50:46,487 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-03 20:50:46,488 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 187 flow [2024-06-03 20:50:46,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:46,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:46,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:46,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:50:46,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:46,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:46,489 INFO L85 PathProgramCache]: Analyzing trace with hash 226717489, now seen corresponding path program 1 times [2024-06-03 20:50:46,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:46,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089998134] [2024-06-03 20:50:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:46,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:46,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:46,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089998134] [2024-06-03 20:50:46,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089998134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:46,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:46,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:50:46,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286195469] [2024-06-03 20:50:46,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:46,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:50:46,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:46,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:50:46,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:50:46,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:46,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-03 20:50:46,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:46,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:46,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:46,840 INFO L124 PetriNetUnfolderBase]: 99/224 cut-off events. [2024-06-03 20:50:46,840 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-03 20:50:46,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 224 events. 99/224 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 867 event pairs, 23 based on Foata normal form. 1/223 useless extension candidates. Maximal degree in co-relation 690. Up to 160 conditions per place. [2024-06-03 20:50:46,842 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 37 selfloop transitions, 9 changer transitions 0/52 dead transitions. [2024-06-03 20:50:46,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 319 flow [2024-06-03 20:50:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:50:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:50:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-03 20:50:46,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-03 20:50:46,843 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 187 flow. Second operand 6 states and 111 transitions. [2024-06-03 20:50:46,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 319 flow [2024-06-03 20:50:46,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 297 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:50:46,845 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 200 flow [2024-06-03 20:50:46,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2024-06-03 20:50:46,845 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-06-03 20:50:46,845 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 200 flow [2024-06-03 20:50:46,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-03 20:50:46,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:46,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:46,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:50:46,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:46,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:46,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1042176055, now seen corresponding path program 2 times [2024-06-03 20:50:46,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:46,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798658333] [2024-06-03 20:50:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:46,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:47,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798658333] [2024-06-03 20:50:47,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798658333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:47,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:47,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:50:47,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536267382] [2024-06-03 20:50:47,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:47,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:50:47,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:50:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:50:47,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:47,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-03 20:50:47,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:47,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:47,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:47,139 INFO L124 PetriNetUnfolderBase]: 102/230 cut-off events. [2024-06-03 20:50:47,140 INFO L125 PetriNetUnfolderBase]: For 631/631 co-relation queries the response was YES. [2024-06-03 20:50:47,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 230 events. 102/230 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 890 event pairs, 24 based on Foata normal form. 1/228 useless extension candidates. Maximal degree in co-relation 745. Up to 149 conditions per place. [2024-06-03 20:50:47,141 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 32 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2024-06-03 20:50:47,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 360 flow [2024-06-03 20:50:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:50:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:50:47,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-03 20:50:47,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2024-06-03 20:50:47,142 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 200 flow. Second operand 6 states and 113 transitions. [2024-06-03 20:50:47,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 360 flow [2024-06-03 20:50:47,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 341 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:50:47,144 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 246 flow [2024-06-03 20:50:47,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2024-06-03 20:50:47,145 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 22 predicate places. [2024-06-03 20:50:47,145 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 246 flow [2024-06-03 20:50:47,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-03 20:50:47,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:47,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:47,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:50:47,146 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:47,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash 69403537, now seen corresponding path program 1 times [2024-06-03 20:50:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040104024] [2024-06-03 20:50:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:47,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:47,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:47,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040104024] [2024-06-03 20:50:47,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040104024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:47,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:47,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:50:47,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795582204] [2024-06-03 20:50:47,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:47,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:50:47,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:47,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:50:47,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:50:47,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:47,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 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) [2024-06-03 20:50:47,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:47,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:47,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:47,470 INFO L124 PetriNetUnfolderBase]: 105/237 cut-off events. [2024-06-03 20:50:47,470 INFO L125 PetriNetUnfolderBase]: For 824/824 co-relation queries the response was YES. [2024-06-03 20:50:47,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 237 events. 105/237 cut-off events. For 824/824 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 939 event pairs, 23 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 808. Up to 161 conditions per place. [2024-06-03 20:50:47,472 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 38 selfloop transitions, 16 changer transitions 0/60 dead transitions. [2024-06-03 20:50:47,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 416 flow [2024-06-03 20:50:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:50:47,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55078125 [2024-06-03 20:50:47,473 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 246 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:50:47,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 416 flow [2024-06-03 20:50:47,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 398 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 20:50:47,476 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 285 flow [2024-06-03 20:50:47,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=285, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-06-03 20:50:47,477 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 28 predicate places. [2024-06-03 20:50:47,477 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 285 flow [2024-06-03 20:50:47,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 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) [2024-06-03 20:50:47,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:47,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:47,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:50:47,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:47,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:47,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1268293267, now seen corresponding path program 3 times [2024-06-03 20:50:47,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:47,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417598847] [2024-06-03 20:50:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:47,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:47,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:47,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417598847] [2024-06-03 20:50:47,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417598847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:47,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:47,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:50:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132430345] [2024-06-03 20:50:47,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:47,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:50:47,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:50:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:50:47,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:47,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-03 20:50:47,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:47,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:47,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:47,729 INFO L124 PetriNetUnfolderBase]: 103/229 cut-off events. [2024-06-03 20:50:47,729 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2024-06-03 20:50:47,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 229 events. 103/229 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 918 event pairs, 30 based on Foata normal form. 1/224 useless extension candidates. Maximal degree in co-relation 844. Up to 152 conditions per place. [2024-06-03 20:50:47,731 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 32 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2024-06-03 20:50:47,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 397 flow [2024-06-03 20:50:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:50:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:50:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-03 20:50:47,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2024-06-03 20:50:47,732 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 285 flow. Second operand 6 states and 109 transitions. [2024-06-03 20:50:47,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 397 flow [2024-06-03 20:50:47,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 368 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:50:47,735 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 293 flow [2024-06-03 20:50:47,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2024-06-03 20:50:47,735 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-03 20:50:47,735 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 293 flow [2024-06-03 20:50:47,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-03 20:50:47,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:47,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:47,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:50:47,740 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:47,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:47,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2114274415, now seen corresponding path program 2 times [2024-06-03 20:50:47,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:47,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666562390] [2024-06-03 20:50:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:47,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:47,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:47,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666562390] [2024-06-03 20:50:47,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666562390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:47,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:47,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:50:47,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014108787] [2024-06-03 20:50:47,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:47,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:50:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:50:47,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:50:48,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:48,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 293 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 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) [2024-06-03 20:50:48,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:48,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:48,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:48,075 INFO L124 PetriNetUnfolderBase]: 106/239 cut-off events. [2024-06-03 20:50:48,075 INFO L125 PetriNetUnfolderBase]: For 1148/1148 co-relation queries the response was YES. [2024-06-03 20:50:48,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 239 events. 106/239 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 962 event pairs, 26 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 887. Up to 162 conditions per place. [2024-06-03 20:50:48,076 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 35 selfloop transitions, 18 changer transitions 0/59 dead transitions. [2024-06-03 20:50:48,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 451 flow [2024-06-03 20:50:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:50:48,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54296875 [2024-06-03 20:50:48,078 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 293 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:50:48,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 451 flow [2024-06-03 20:50:48,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 59 transitions, 410 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:48,082 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 303 flow [2024-06-03 20:50:48,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2024-06-03 20:50:48,083 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-06-03 20:50:48,083 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 303 flow [2024-06-03 20:50:48,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 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) [2024-06-03 20:50:48,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:48,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:48,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:50:48,083 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:48,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2105703535, now seen corresponding path program 3 times [2024-06-03 20:50:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:48,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797546608] [2024-06-03 20:50:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:48,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:48,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797546608] [2024-06-03 20:50:48,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797546608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:48,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:48,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:50:48,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249068802] [2024-06-03 20:50:48,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:48,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:50:48,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:50:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:50:48,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:48,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 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) [2024-06-03 20:50:48,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:48,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:48,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:48,415 INFO L124 PetriNetUnfolderBase]: 104/239 cut-off events. [2024-06-03 20:50:48,416 INFO L125 PetriNetUnfolderBase]: For 1217/1217 co-relation queries the response was YES. [2024-06-03 20:50:48,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 239 events. 104/239 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 960 event pairs, 22 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 885. Up to 178 conditions per place. [2024-06-03 20:50:48,417 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 39 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2024-06-03 20:50:48,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 415 flow [2024-06-03 20:50:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:50:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:50:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-03 20:50:48,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-03 20:50:48,418 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 303 flow. Second operand 5 states and 92 transitions. [2024-06-03 20:50:48,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 415 flow [2024-06-03 20:50:48,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 375 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:48,422 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 291 flow [2024-06-03 20:50:48,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2024-06-03 20:50:48,423 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-03 20:50:48,423 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 291 flow [2024-06-03 20:50:48,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 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) [2024-06-03 20:50:48,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:48,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:48,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:50:48,424 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:48,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:48,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2105692623, now seen corresponding path program 1 times [2024-06-03 20:50:48,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:48,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424725132] [2024-06-03 20:50:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:48,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:48,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:48,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424725132] [2024-06-03 20:50:48,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424725132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:48,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:48,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:50:48,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802807732] [2024-06-03 20:50:48,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:48,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:50:48,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:50:48,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:50:48,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:48,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 291 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 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) [2024-06-03 20:50:48,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:48,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:48,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:48,739 INFO L124 PetriNetUnfolderBase]: 101/234 cut-off events. [2024-06-03 20:50:48,740 INFO L125 PetriNetUnfolderBase]: For 1326/1326 co-relation queries the response was YES. [2024-06-03 20:50:48,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 234 events. 101/234 cut-off events. For 1326/1326 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 926 event pairs, 21 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 850. Up to 173 conditions per place. [2024-06-03 20:50:48,741 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 43 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-03 20:50:48,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 407 flow [2024-06-03 20:50:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:50:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:50:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-03 20:50:48,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:50:48,742 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 291 flow. Second operand 5 states and 90 transitions. [2024-06-03 20:50:48,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 407 flow [2024-06-03 20:50:48,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 56 transitions, 382 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:48,746 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 284 flow [2024-06-03 20:50:48,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2024-06-03 20:50:48,746 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-03 20:50:48,747 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 284 flow [2024-06-03 20:50:48,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 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) [2024-06-03 20:50:48,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:48,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:48,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:50:48,748 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:48,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:48,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1981859856, now seen corresponding path program 1 times [2024-06-03 20:50:48,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:48,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96723612] [2024-06-03 20:50:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:48,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:48,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:48,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96723612] [2024-06-03 20:50:48,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96723612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:48,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:48,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:50:48,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120489164] [2024-06-03 20:50:48,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:48,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:50:48,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:48,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:50:48,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:50:49,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:49,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:49,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:49,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:49,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:49,088 INFO L124 PetriNetUnfolderBase]: 112/255 cut-off events. [2024-06-03 20:50:49,088 INFO L125 PetriNetUnfolderBase]: For 1506/1506 co-relation queries the response was YES. [2024-06-03 20:50:49,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 255 events. 112/255 cut-off events. For 1506/1506 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1037 event pairs, 9 based on Foata normal form. 2/255 useless extension candidates. Maximal degree in co-relation 942. Up to 150 conditions per place. [2024-06-03 20:50:49,090 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 51 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-03 20:50:49,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 492 flow [2024-06-03 20:50:49,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:50:49,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-06-03 20:50:49,091 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 284 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:50:49,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 492 flow [2024-06-03 20:50:49,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 476 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:50:49,095 INFO L231 Difference]: Finished difference. Result has 68 places, 51 transitions, 314 flow [2024-06-03 20:50:49,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=68, PETRI_TRANSITIONS=51} [2024-06-03 20:50:49,095 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2024-06-03 20:50:49,096 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 51 transitions, 314 flow [2024-06-03 20:50:49,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:49,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:49,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:49,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:50:49,096 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:49,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:49,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1551087334, now seen corresponding path program 2 times [2024-06-03 20:50:49,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:49,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325966631] [2024-06-03 20:50:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:49,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:49,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:49,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325966631] [2024-06-03 20:50:49,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325966631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:49,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:49,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:50:49,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815327760] [2024-06-03 20:50:49,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:49,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:50:49,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:49,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:50:49,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:50:49,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:49,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:49,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:49,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:49,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:49,414 INFO L124 PetriNetUnfolderBase]: 109/250 cut-off events. [2024-06-03 20:50:49,414 INFO L125 PetriNetUnfolderBase]: For 1589/1589 co-relation queries the response was YES. [2024-06-03 20:50:49,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 250 events. 109/250 cut-off events. For 1589/1589 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1027 event pairs, 19 based on Foata normal form. 2/250 useless extension candidates. Maximal degree in co-relation 939. Up to 174 conditions per place. [2024-06-03 20:50:49,416 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 50 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-03 20:50:49,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 470 flow [2024-06-03 20:50:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:50:49,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:50:49,418 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 314 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:50:49,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 470 flow [2024-06-03 20:50:49,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 446 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:50:49,421 INFO L231 Difference]: Finished difference. Result has 71 places, 51 transitions, 314 flow [2024-06-03 20:50:49,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=71, PETRI_TRANSITIONS=51} [2024-06-03 20:50:49,422 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-03 20:50:49,422 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 51 transitions, 314 flow [2024-06-03 20:50:49,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:49,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:49,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:49,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:50:49,423 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:49,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1551092294, now seen corresponding path program 1 times [2024-06-03 20:50:49,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:49,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332215781] [2024-06-03 20:50:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:49,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:49,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:49,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332215781] [2024-06-03 20:50:49,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332215781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:49,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:49,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:49,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956217441] [2024-06-03 20:50:49,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:49,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:49,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:49,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:49,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:49,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:49,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 51 transitions, 314 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:49,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:49,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:49,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:49,772 INFO L124 PetriNetUnfolderBase]: 112/257 cut-off events. [2024-06-03 20:50:49,772 INFO L125 PetriNetUnfolderBase]: For 1671/1671 co-relation queries the response was YES. [2024-06-03 20:50:49,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 257 events. 112/257 cut-off events. For 1671/1671 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1058 event pairs, 18 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 971. Up to 182 conditions per place. [2024-06-03 20:50:49,774 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 50 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-03 20:50:49,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 484 flow [2024-06-03 20:50:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:50:49,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:50:49,775 INFO L175 Difference]: Start difference. First operand has 71 places, 51 transitions, 314 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:50:49,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 484 flow [2024-06-03 20:50:49,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 67 transitions, 462 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:49,780 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 337 flow [2024-06-03 20:50:49,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2024-06-03 20:50:49,781 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-03 20:50:49,781 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 337 flow [2024-06-03 20:50:49,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:49,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:49,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:49,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:50:49,782 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:49,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:49,782 INFO L85 PathProgramCache]: Analyzing trace with hash -274497358, now seen corresponding path program 3 times [2024-06-03 20:50:49,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:49,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767615491] [2024-06-03 20:50:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:49,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:49,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:49,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767615491] [2024-06-03 20:50:49,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767615491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:49,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:49,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:50:49,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435519797] [2024-06-03 20:50:49,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:49,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:50:49,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:49,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:50:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:50:50,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:50,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:50,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:50,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:50,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:50,078 INFO L124 PetriNetUnfolderBase]: 116/264 cut-off events. [2024-06-03 20:50:50,078 INFO L125 PetriNetUnfolderBase]: For 2023/2023 co-relation queries the response was YES. [2024-06-03 20:50:50,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 264 events. 116/264 cut-off events. For 2023/2023 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1094 event pairs, 19 based on Foata normal form. 2/263 useless extension candidates. Maximal degree in co-relation 1032. Up to 172 conditions per place. [2024-06-03 20:50:50,080 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 43 selfloop transitions, 17 changer transitions 0/66 dead transitions. [2024-06-03 20:50:50,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 66 transitions, 495 flow [2024-06-03 20:50:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:50,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 20:50:50,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669642857142857 [2024-06-03 20:50:50,081 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 337 flow. Second operand 7 states and 127 transitions. [2024-06-03 20:50:50,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 66 transitions, 495 flow [2024-06-03 20:50:50,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 66 transitions, 466 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:50,085 INFO L231 Difference]: Finished difference. Result has 74 places, 54 transitions, 358 flow [2024-06-03 20:50:50,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=358, PETRI_PLACES=74, PETRI_TRANSITIONS=54} [2024-06-03 20:50:50,085 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 43 predicate places. [2024-06-03 20:50:50,085 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 54 transitions, 358 flow [2024-06-03 20:50:50,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:50,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:50,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:50,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:50:50,086 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:50,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:50,086 INFO L85 PathProgramCache]: Analyzing trace with hash -268063308, now seen corresponding path program 2 times [2024-06-03 20:50:50,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:50,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209613663] [2024-06-03 20:50:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:50,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:50,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:50,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209613663] [2024-06-03 20:50:50,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209613663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:50,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:50,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:50,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481107724] [2024-06-03 20:50:50,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:50,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:50,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:50,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:50,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 54 transitions, 358 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:50,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:50,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:50,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:50,404 INFO L124 PetriNetUnfolderBase]: 124/281 cut-off events. [2024-06-03 20:50:50,420 INFO L125 PetriNetUnfolderBase]: For 2346/2346 co-relation queries the response was YES. [2024-06-03 20:50:50,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 281 events. 124/281 cut-off events. For 2346/2346 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1195 event pairs, 19 based on Foata normal form. 1/279 useless extension candidates. Maximal degree in co-relation 1139. Up to 161 conditions per place. [2024-06-03 20:50:50,422 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 41 selfloop transitions, 30 changer transitions 0/77 dead transitions. [2024-06-03 20:50:50,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 656 flow [2024-06-03 20:50:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-03 20:50:50,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-03 20:50:50,423 INFO L175 Difference]: Start difference. First operand has 74 places, 54 transitions, 358 flow. Second operand 11 states and 191 transitions. [2024-06-03 20:50:50,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 656 flow [2024-06-03 20:50:50,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 616 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:50,429 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 441 flow [2024-06-03 20:50:50,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=441, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-06-03 20:50:50,429 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 49 predicate places. [2024-06-03 20:50:50,429 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 441 flow [2024-06-03 20:50:50,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:50,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:50,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:50,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:50:50,430 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:50,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:50,430 INFO L85 PathProgramCache]: Analyzing trace with hash -267826158, now seen corresponding path program 3 times [2024-06-03 20:50:50,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:50,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434437409] [2024-06-03 20:50:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:50,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:50,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434437409] [2024-06-03 20:50:50,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434437409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:50,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:50,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:50,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141075887] [2024-06-03 20:50:50,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:50,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:50,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:50,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:50,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:50,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:50,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:50,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:50,719 INFO L124 PetriNetUnfolderBase]: 122/278 cut-off events. [2024-06-03 20:50:50,719 INFO L125 PetriNetUnfolderBase]: For 2505/2505 co-relation queries the response was YES. [2024-06-03 20:50:50,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 278 events. 122/278 cut-off events. For 2505/2505 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1201 event pairs, 19 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 1151. Up to 159 conditions per place. [2024-06-03 20:50:50,721 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 39 selfloop transitions, 29 changer transitions 0/74 dead transitions. [2024-06-03 20:50:50,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 74 transitions, 643 flow [2024-06-03 20:50:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:50:50,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 20:50:50,723 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 441 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:50:50,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 74 transitions, 643 flow [2024-06-03 20:50:50,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 74 transitions, 583 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:50,729 INFO L231 Difference]: Finished difference. Result has 83 places, 60 transitions, 444 flow [2024-06-03 20:50:50,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=444, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2024-06-03 20:50:50,730 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-03 20:50:50,730 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 444 flow [2024-06-03 20:50:50,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:50,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:50,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:50,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:50:50,731 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:50,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:50,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2022640048, now seen corresponding path program 1 times [2024-06-03 20:50:50,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:50,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053547028] [2024-06-03 20:50:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:50,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:50,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:50,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053547028] [2024-06-03 20:50:50,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053547028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:50,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:50,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:50,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385292135] [2024-06-03 20:50:50,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:50,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:50,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:50,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:50,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:50,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:50,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:50,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:51,038 INFO L124 PetriNetUnfolderBase]: 126/286 cut-off events. [2024-06-03 20:50:51,039 INFO L125 PetriNetUnfolderBase]: For 2892/2892 co-relation queries the response was YES. [2024-06-03 20:50:51,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 286 events. 126/286 cut-off events. For 2892/2892 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1242 event pairs, 19 based on Foata normal form. 2/285 useless extension candidates. Maximal degree in co-relation 1206. Up to 196 conditions per place. [2024-06-03 20:50:51,040 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 50 selfloop transitions, 19 changer transitions 0/75 dead transitions. [2024-06-03 20:50:51,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 620 flow [2024-06-03 20:50:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:50:51,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2024-06-03 20:50:51,043 INFO L175 Difference]: Start difference. First operand has 83 places, 60 transitions, 444 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:50:51,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 620 flow [2024-06-03 20:50:51,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 562 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:51,051 INFO L231 Difference]: Finished difference. Result has 84 places, 61 transitions, 436 flow [2024-06-03 20:50:51,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=436, PETRI_PLACES=84, PETRI_TRANSITIONS=61} [2024-06-03 20:50:51,052 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-03 20:50:51,052 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 61 transitions, 436 flow [2024-06-03 20:50:51,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:51,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:51,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:51,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:50:51,053 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:51,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:51,053 INFO L85 PathProgramCache]: Analyzing trace with hash -940851790, now seen corresponding path program 4 times [2024-06-03 20:50:51,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:51,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402206040] [2024-06-03 20:50:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:51,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:51,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402206040] [2024-06-03 20:50:51,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402206040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:51,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:51,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:50:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477709484] [2024-06-03 20:50:51,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:51,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:50:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:50:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:50:51,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:51,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 61 transitions, 436 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:51,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:51,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:51,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:51,338 INFO L124 PetriNetUnfolderBase]: 123/276 cut-off events. [2024-06-03 20:50:51,338 INFO L125 PetriNetUnfolderBase]: For 2764/2764 co-relation queries the response was YES. [2024-06-03 20:50:51,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 276 events. 123/276 cut-off events. For 2764/2764 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1207 event pairs, 25 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 1146. Up to 185 conditions per place. [2024-06-03 20:50:51,340 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 47 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2024-06-03 20:50:51,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 70 transitions, 584 flow [2024-06-03 20:50:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:50:51,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 20:50:51,341 INFO L175 Difference]: Start difference. First operand has 84 places, 61 transitions, 436 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:50:51,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 70 transitions, 584 flow [2024-06-03 20:50:51,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 70 transitions, 544 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:51,348 INFO L231 Difference]: Finished difference. Result has 84 places, 61 transitions, 434 flow [2024-06-03 20:50:51,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=434, PETRI_PLACES=84, PETRI_TRANSITIONS=61} [2024-06-03 20:50:51,349 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-03 20:50:51,349 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 61 transitions, 434 flow [2024-06-03 20:50:51,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:51,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:51,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:51,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:50:51,350 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:51,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:51,350 INFO L85 PathProgramCache]: Analyzing trace with hash -936571886, now seen corresponding path program 4 times [2024-06-03 20:50:51,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:51,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510186487] [2024-06-03 20:50:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:51,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:51,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:51,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510186487] [2024-06-03 20:50:51,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510186487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:51,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:51,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:51,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122242393] [2024-06-03 20:50:51,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:51,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:51,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:51,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:51,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:51,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:51,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 61 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:51,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:51,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:51,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:51,625 INFO L124 PetriNetUnfolderBase]: 131/293 cut-off events. [2024-06-03 20:50:51,626 INFO L125 PetriNetUnfolderBase]: For 3055/3055 co-relation queries the response was YES. [2024-06-03 20:50:51,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1279 conditions, 293 events. 131/293 cut-off events. For 3055/3055 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1300 event pairs, 25 based on Foata normal form. 1/288 useless extension candidates. Maximal degree in co-relation 1238. Up to 172 conditions per place. [2024-06-03 20:50:51,628 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 38 selfloop transitions, 33 changer transitions 0/77 dead transitions. [2024-06-03 20:50:51,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 77 transitions, 722 flow [2024-06-03 20:50:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:51,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:50:51,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590277777777778 [2024-06-03 20:50:51,629 INFO L175 Difference]: Start difference. First operand has 84 places, 61 transitions, 434 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:50:51,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 77 transitions, 722 flow [2024-06-03 20:50:51,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 77 transitions, 674 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:51,635 INFO L231 Difference]: Finished difference. Result has 87 places, 65 transitions, 497 flow [2024-06-03 20:50:51,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=497, PETRI_PLACES=87, PETRI_TRANSITIONS=65} [2024-06-03 20:50:51,635 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-03 20:50:51,635 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 65 transitions, 497 flow [2024-06-03 20:50:51,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:51,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:51,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:51,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:50:51,636 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:51,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:51,636 INFO L85 PathProgramCache]: Analyzing trace with hash -304819344, now seen corresponding path program 5 times [2024-06-03 20:50:51,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:51,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792979755] [2024-06-03 20:50:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:51,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:51,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:51,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792979755] [2024-06-03 20:50:51,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792979755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:51,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:51,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:51,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951553021] [2024-06-03 20:50:51,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:51,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:51,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:51,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:51,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:51,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:51,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 65 transitions, 497 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:51,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:51,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:51,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:51,952 INFO L124 PetriNetUnfolderBase]: 129/290 cut-off events. [2024-06-03 20:50:51,953 INFO L125 PetriNetUnfolderBase]: For 3118/3118 co-relation queries the response was YES. [2024-06-03 20:50:51,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 290 events. 129/290 cut-off events. For 3118/3118 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1289 event pairs, 25 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1219. Up to 170 conditions per place. [2024-06-03 20:50:51,955 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 36 selfloop transitions, 35 changer transitions 0/77 dead transitions. [2024-06-03 20:50:51,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 77 transitions, 707 flow [2024-06-03 20:50:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-03 20:50:51,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 20:50:51,956 INFO L175 Difference]: Start difference. First operand has 87 places, 65 transitions, 497 flow. Second operand 10 states and 172 transitions. [2024-06-03 20:50:51,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 77 transitions, 707 flow [2024-06-03 20:50:51,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 77 transitions, 599 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:51,966 INFO L231 Difference]: Finished difference. Result has 89 places, 65 transitions, 464 flow [2024-06-03 20:50:51,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=464, PETRI_PLACES=89, PETRI_TRANSITIONS=65} [2024-06-03 20:50:51,966 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-03 20:50:51,966 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 65 transitions, 464 flow [2024-06-03 20:50:51,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:51,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:51,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:51,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:50:51,967 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:51,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash -651472016, now seen corresponding path program 6 times [2024-06-03 20:50:51,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:51,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086339653] [2024-06-03 20:50:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:51,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:52,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:52,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086339653] [2024-06-03 20:50:52,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086339653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:52,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:52,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:52,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733991074] [2024-06-03 20:50:52,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:52,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:52,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:52,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:52,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:52,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:52,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 65 transitions, 464 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:52,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:52,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:52,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:52,273 INFO L124 PetriNetUnfolderBase]: 127/293 cut-off events. [2024-06-03 20:50:52,273 INFO L125 PetriNetUnfolderBase]: For 3022/3022 co-relation queries the response was YES. [2024-06-03 20:50:52,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 293 events. 127/293 cut-off events. For 3022/3022 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1300 event pairs, 17 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1136. Up to 216 conditions per place. [2024-06-03 20:50:52,275 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 52 selfloop transitions, 14 changer transitions 0/72 dead transitions. [2024-06-03 20:50:52,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 72 transitions, 612 flow [2024-06-03 20:50:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:50:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:50:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 20:50:52,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:50:52,276 INFO L175 Difference]: Start difference. First operand has 89 places, 65 transitions, 464 flow. Second operand 6 states and 108 transitions. [2024-06-03 20:50:52,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 72 transitions, 612 flow [2024-06-03 20:50:52,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 72 transitions, 531 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:52,283 INFO L231 Difference]: Finished difference. Result has 87 places, 65 transitions, 419 flow [2024-06-03 20:50:52,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=419, PETRI_PLACES=87, PETRI_TRANSITIONS=65} [2024-06-03 20:50:52,284 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-03 20:50:52,284 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 65 transitions, 419 flow [2024-06-03 20:50:52,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:52,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:52,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:52,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:50:52,285 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:52,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash -298144176, now seen corresponding path program 2 times [2024-06-03 20:50:52,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:52,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699033052] [2024-06-03 20:50:52,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:52,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:52,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:52,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699033052] [2024-06-03 20:50:52,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699033052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:52,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:52,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:52,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546679556] [2024-06-03 20:50:52,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:52,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:52,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:52,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:52,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:52,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 65 transitions, 419 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:52,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:52,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:52,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:52,607 INFO L124 PetriNetUnfolderBase]: 131/298 cut-off events. [2024-06-03 20:50:52,607 INFO L125 PetriNetUnfolderBase]: For 3473/3473 co-relation queries the response was YES. [2024-06-03 20:50:52,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 298 events. 131/298 cut-off events. For 3473/3473 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1322 event pairs, 21 based on Foata normal form. 2/296 useless extension candidates. Maximal degree in co-relation 1121. Up to 206 conditions per place. [2024-06-03 20:50:52,609 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 52 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-06-03 20:50:52,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 77 transitions, 591 flow [2024-06-03 20:50:52,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:50:52,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-03 20:50:52,610 INFO L175 Difference]: Start difference. First operand has 87 places, 65 transitions, 419 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:50:52,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 77 transitions, 591 flow [2024-06-03 20:50:52,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 77 transitions, 564 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:52,617 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 442 flow [2024-06-03 20:50:52,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=442, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2024-06-03 20:50:52,618 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-03 20:50:52,618 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 442 flow [2024-06-03 20:50:52,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:52,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:52,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:52,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:50:52,619 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:52,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:52,619 INFO L85 PathProgramCache]: Analyzing trace with hash -651463088, now seen corresponding path program 3 times [2024-06-03 20:50:52,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:52,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118217187] [2024-06-03 20:50:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:52,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:52,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:52,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118217187] [2024-06-03 20:50:52,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118217187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:52,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:52,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:52,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523640289] [2024-06-03 20:50:52,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:52,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:52,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:52,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:52,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:52,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 442 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:52,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:52,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:52,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:52,931 INFO L124 PetriNetUnfolderBase]: 135/311 cut-off events. [2024-06-03 20:50:52,931 INFO L125 PetriNetUnfolderBase]: For 3519/3519 co-relation queries the response was YES. [2024-06-03 20:50:52,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1217 conditions, 311 events. 135/311 cut-off events. For 3519/3519 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1407 event pairs, 19 based on Foata normal form. 2/311 useless extension candidates. Maximal degree in co-relation 1176. Up to 232 conditions per place. [2024-06-03 20:50:52,934 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 58 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-03 20:50:52,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 75 transitions, 606 flow [2024-06-03 20:50:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:50:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:50:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 20:50:52,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572916666666666 [2024-06-03 20:50:52,935 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 442 flow. Second operand 6 states and 107 transitions. [2024-06-03 20:50:52,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 75 transitions, 606 flow [2024-06-03 20:50:52,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 75 transitions, 566 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:52,943 INFO L231 Difference]: Finished difference. Result has 90 places, 67 transitions, 438 flow [2024-06-03 20:50:52,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=90, PETRI_TRANSITIONS=67} [2024-06-03 20:50:52,944 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2024-06-03 20:50:52,944 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 67 transitions, 438 flow [2024-06-03 20:50:52,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:52,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:52,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:52,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:50:52,944 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:52,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash -640987568, now seen corresponding path program 4 times [2024-06-03 20:50:52,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:52,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578854426] [2024-06-03 20:50:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:52,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:53,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:53,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578854426] [2024-06-03 20:50:53,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578854426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:53,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:53,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:53,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832295126] [2024-06-03 20:50:53,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:53,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:53,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:53,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:53,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:53,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:53,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 67 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:53,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:53,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:53,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:53,247 INFO L124 PetriNetUnfolderBase]: 132/308 cut-off events. [2024-06-03 20:50:53,248 INFO L125 PetriNetUnfolderBase]: For 3196/3196 co-relation queries the response was YES. [2024-06-03 20:50:53,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 308 events. 132/308 cut-off events. For 3196/3196 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1389 event pairs, 16 based on Foata normal form. 2/308 useless extension candidates. Maximal degree in co-relation 1110. Up to 213 conditions per place. [2024-06-03 20:50:53,249 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 58 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-06-03 20:50:53,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 77 transitions, 602 flow [2024-06-03 20:50:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 20:50:53,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-03 20:50:53,250 INFO L175 Difference]: Start difference. First operand has 90 places, 67 transitions, 438 flow. Second operand 7 states and 122 transitions. [2024-06-03 20:50:53,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 77 transitions, 602 flow [2024-06-03 20:50:53,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 77 transitions, 576 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:50:53,258 INFO L231 Difference]: Finished difference. Result has 93 places, 67 transitions, 442 flow [2024-06-03 20:50:53,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=93, PETRI_TRANSITIONS=67} [2024-06-03 20:50:53,259 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-06-03 20:50:53,259 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 67 transitions, 442 flow [2024-06-03 20:50:53,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:53,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:53,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:50:53,259 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:53,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1896845135, now seen corresponding path program 1 times [2024-06-03 20:50:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:53,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865866253] [2024-06-03 20:50:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:53,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:53,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865866253] [2024-06-03 20:50:53,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865866253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:53,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:53,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:53,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942938675] [2024-06-03 20:50:53,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:53,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:53,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:53,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:53,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 67 transitions, 442 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:53,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:53,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:53,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:53,655 INFO L124 PetriNetUnfolderBase]: 162/378 cut-off events. [2024-06-03 20:50:53,656 INFO L125 PetriNetUnfolderBase]: For 7215/7215 co-relation queries the response was YES. [2024-06-03 20:50:53,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1563 conditions, 378 events. 162/378 cut-off events. For 7215/7215 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1808 event pairs, 28 based on Foata normal form. 6/382 useless extension candidates. Maximal degree in co-relation 1520. Up to 177 conditions per place. [2024-06-03 20:50:53,658 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 65 selfloop transitions, 9 changer transitions 12/92 dead transitions. [2024-06-03 20:50:53,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 92 transitions, 744 flow [2024-06-03 20:50:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 20:50:53,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:50:53,660 INFO L175 Difference]: Start difference. First operand has 93 places, 67 transitions, 442 flow. Second operand 9 states and 162 transitions. [2024-06-03 20:50:53,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 92 transitions, 744 flow [2024-06-03 20:50:53,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 712 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:53,671 INFO L231 Difference]: Finished difference. Result has 97 places, 64 transitions, 413 flow [2024-06-03 20:50:53,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=413, PETRI_PLACES=97, PETRI_TRANSITIONS=64} [2024-06-03 20:50:53,672 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 66 predicate places. [2024-06-03 20:50:53,672 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 64 transitions, 413 flow [2024-06-03 20:50:53,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:53,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:53,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:53,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:50:53,673 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:53,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash 352000369, now seen corresponding path program 2 times [2024-06-03 20:50:53,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:53,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908095392] [2024-06-03 20:50:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:53,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:53,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:53,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908095392] [2024-06-03 20:50:53,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908095392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:53,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:53,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:53,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185532333] [2024-06-03 20:50:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:53,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:53,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:53,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:53,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 64 transitions, 413 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:53,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:53,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:53,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:54,025 INFO L124 PetriNetUnfolderBase]: 146/338 cut-off events. [2024-06-03 20:50:54,025 INFO L125 PetriNetUnfolderBase]: For 7677/7677 co-relation queries the response was YES. [2024-06-03 20:50:54,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 338 events. 146/338 cut-off events. For 7677/7677 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1566 event pairs, 26 based on Foata normal form. 6/342 useless extension candidates. Maximal degree in co-relation 1412. Up to 177 conditions per place. [2024-06-03 20:50:54,028 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 64 selfloop transitions, 8 changer transitions 6/84 dead transitions. [2024-06-03 20:50:54,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 84 transitions, 689 flow [2024-06-03 20:50:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:50:54,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-06-03 20:50:54,029 INFO L175 Difference]: Start difference. First operand has 97 places, 64 transitions, 413 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:50:54,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 84 transitions, 689 flow [2024-06-03 20:50:54,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 84 transitions, 645 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 20:50:54,038 INFO L231 Difference]: Finished difference. Result has 92 places, 62 transitions, 385 flow [2024-06-03 20:50:54,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=385, PETRI_PLACES=92, PETRI_TRANSITIONS=62} [2024-06-03 20:50:54,039 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 61 predicate places. [2024-06-03 20:50:54,039 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 62 transitions, 385 flow [2024-06-03 20:50:54,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:54,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:54,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:54,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:50:54,040 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:54,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:54,040 INFO L85 PathProgramCache]: Analyzing trace with hash 352177999, now seen corresponding path program 3 times [2024-06-03 20:50:54,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:54,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992572277] [2024-06-03 20:50:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:54,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:54,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:54,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992572277] [2024-06-03 20:50:54,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992572277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:54,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:54,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:54,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552672028] [2024-06-03 20:50:54,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:54,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:54,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:54,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:54,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:54,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:54,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 62 transitions, 385 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:54,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:54,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:54,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:54,365 INFO L124 PetriNetUnfolderBase]: 122/286 cut-off events. [2024-06-03 20:50:54,366 INFO L125 PetriNetUnfolderBase]: For 4898/4898 co-relation queries the response was YES. [2024-06-03 20:50:54,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 286 events. 122/286 cut-off events. For 4898/4898 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1271 event pairs, 18 based on Foata normal form. 8/292 useless extension candidates. Maximal degree in co-relation 1015. Up to 177 conditions per place. [2024-06-03 20:50:54,367 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 52 selfloop transitions, 4 changer transitions 16/78 dead transitions. [2024-06-03 20:50:54,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 78 transitions, 579 flow [2024-06-03 20:50:54,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:50:54,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53515625 [2024-06-03 20:50:54,368 INFO L175 Difference]: Start difference. First operand has 92 places, 62 transitions, 385 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:50:54,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 78 transitions, 579 flow [2024-06-03 20:50:54,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 78 transitions, 561 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:54,374 INFO L231 Difference]: Finished difference. Result has 91 places, 57 transitions, 347 flow [2024-06-03 20:50:54,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=347, PETRI_PLACES=91, PETRI_TRANSITIONS=57} [2024-06-03 20:50:54,374 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-03 20:50:54,374 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 57 transitions, 347 flow [2024-06-03 20:50:54,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:54,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:54,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:54,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:50:54,375 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:54,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:54,375 INFO L85 PathProgramCache]: Analyzing trace with hash -256739505, now seen corresponding path program 4 times [2024-06-03 20:50:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:54,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334840411] [2024-06-03 20:50:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:54,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:54,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:54,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334840411] [2024-06-03 20:50:54,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334840411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:54,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:54,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186203383] [2024-06-03 20:50:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:54,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:54,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:54,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:54,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 57 transitions, 347 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:54,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:54,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:54,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:54,724 INFO L124 PetriNetUnfolderBase]: 112/259 cut-off events. [2024-06-03 20:50:54,724 INFO L125 PetriNetUnfolderBase]: For 4561/4561 co-relation queries the response was YES. [2024-06-03 20:50:54,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 259 events. 112/259 cut-off events. For 4561/4561 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1116 event pairs, 21 based on Foata normal form. 8/264 useless extension candidates. Maximal degree in co-relation 923. Up to 131 conditions per place. [2024-06-03 20:50:54,726 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 34 selfloop transitions, 25 changer transitions 9/74 dead transitions. [2024-06-03 20:50:54,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 74 transitions, 533 flow [2024-06-03 20:50:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:50:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:50:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-03 20:50:54,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-03 20:50:54,727 INFO L175 Difference]: Start difference. First operand has 91 places, 57 transitions, 347 flow. Second operand 12 states and 200 transitions. [2024-06-03 20:50:54,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 74 transitions, 533 flow [2024-06-03 20:50:54,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 74 transitions, 517 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:54,732 INFO L231 Difference]: Finished difference. Result has 89 places, 54 transitions, 369 flow [2024-06-03 20:50:54,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=369, PETRI_PLACES=89, PETRI_TRANSITIONS=54} [2024-06-03 20:50:54,733 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-03 20:50:54,733 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 54 transitions, 369 flow [2024-06-03 20:50:54,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:54,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:54,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:54,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:50:54,733 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:54,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:54,734 INFO L85 PathProgramCache]: Analyzing trace with hash -526918927, now seen corresponding path program 5 times [2024-06-03 20:50:54,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:54,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393409286] [2024-06-03 20:50:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:54,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:54,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:54,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393409286] [2024-06-03 20:50:54,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393409286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:54,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:54,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:54,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624579909] [2024-06-03 20:50:54,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:54,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:54,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:54,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:54,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:54,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:54,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 54 transitions, 369 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:54,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:54,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:54,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:55,112 INFO L124 PetriNetUnfolderBase]: 125/294 cut-off events. [2024-06-03 20:50:55,112 INFO L125 PetriNetUnfolderBase]: For 5559/5559 co-relation queries the response was YES. [2024-06-03 20:50:55,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 294 events. 125/294 cut-off events. For 5559/5559 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1304 event pairs, 29 based on Foata normal form. 6/297 useless extension candidates. Maximal degree in co-relation 1201. Up to 117 conditions per place. [2024-06-03 20:50:55,114 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 38 selfloop transitions, 23 changer transitions 8/75 dead transitions. [2024-06-03 20:50:55,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 75 transitions, 613 flow [2024-06-03 20:50:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:50:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:50:55,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-03 20:50:55,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-03 20:50:55,116 INFO L175 Difference]: Start difference. First operand has 89 places, 54 transitions, 369 flow. Second operand 12 states and 202 transitions. [2024-06-03 20:50:55,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 75 transitions, 613 flow [2024-06-03 20:50:55,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 555 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 20:50:55,125 INFO L231 Difference]: Finished difference. Result has 87 places, 51 transitions, 345 flow [2024-06-03 20:50:55,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=345, PETRI_PLACES=87, PETRI_TRANSITIONS=51} [2024-06-03 20:50:55,126 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-03 20:50:55,126 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 51 transitions, 345 flow [2024-06-03 20:50:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:55,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:55,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:55,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:50:55,126 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:55,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1854556783, now seen corresponding path program 1 times [2024-06-03 20:50:55,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:55,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047496407] [2024-06-03 20:50:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:55,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:55,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:55,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047496407] [2024-06-03 20:50:55,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047496407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:55,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:55,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:55,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992966592] [2024-06-03 20:50:55,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:55,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:55,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:55,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 51 transitions, 345 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:55,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:55,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:55,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:55,474 INFO L124 PetriNetUnfolderBase]: 100/237 cut-off events. [2024-06-03 20:50:55,474 INFO L125 PetriNetUnfolderBase]: For 3788/3788 co-relation queries the response was YES. [2024-06-03 20:50:55,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 237 events. 100/237 cut-off events. For 3788/3788 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 975 event pairs, 21 based on Foata normal form. 8/242 useless extension candidates. Maximal degree in co-relation 867. Up to 117 conditions per place. [2024-06-03 20:50:55,475 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 31 selfloop transitions, 20 changer transitions 9/66 dead transitions. [2024-06-03 20:50:55,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 66 transitions, 509 flow [2024-06-03 20:50:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-03 20:50:55,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528125 [2024-06-03 20:50:55,477 INFO L175 Difference]: Start difference. First operand has 87 places, 51 transitions, 345 flow. Second operand 10 states and 169 transitions. [2024-06-03 20:50:55,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 66 transitions, 509 flow [2024-06-03 20:50:55,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 66 transitions, 459 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-03 20:50:55,481 INFO L231 Difference]: Finished difference. Result has 82 places, 48 transitions, 319 flow [2024-06-03 20:50:55,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=319, PETRI_PLACES=82, PETRI_TRANSITIONS=48} [2024-06-03 20:50:55,482 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-03 20:50:55,482 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 48 transitions, 319 flow [2024-06-03 20:50:55,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:55,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:55,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:55,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:50:55,482 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:55,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1863127663, now seen corresponding path program 2 times [2024-06-03 20:50:55,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:55,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786983640] [2024-06-03 20:50:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:55,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:55,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:55,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786983640] [2024-06-03 20:50:55,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786983640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:55,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:55,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:55,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906946640] [2024-06-03 20:50:55,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:55,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:55,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:55,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:55,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:55,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 48 transitions, 319 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:55,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:55,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:55,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:55,839 INFO L124 PetriNetUnfolderBase]: 91/220 cut-off events. [2024-06-03 20:50:55,839 INFO L125 PetriNetUnfolderBase]: For 2771/2771 co-relation queries the response was YES. [2024-06-03 20:50:55,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 220 events. 91/220 cut-off events. For 2771/2771 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 876 event pairs, 15 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 789. Up to 107 conditions per place. [2024-06-03 20:50:55,840 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 25 selfloop transitions, 16 changer transitions 16/63 dead transitions. [2024-06-03 20:50:55,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 63 transitions, 471 flow [2024-06-03 20:50:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-03 20:50:55,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-03 20:50:55,841 INFO L175 Difference]: Start difference. First operand has 82 places, 48 transitions, 319 flow. Second operand 10 states and 167 transitions. [2024-06-03 20:50:55,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 63 transitions, 471 flow [2024-06-03 20:50:55,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 63 transitions, 427 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:50:55,845 INFO L231 Difference]: Finished difference. Result has 79 places, 43 transitions, 277 flow [2024-06-03 20:50:55,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=277, PETRI_PLACES=79, PETRI_TRANSITIONS=43} [2024-06-03 20:50:55,845 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 48 predicate places. [2024-06-03 20:50:55,845 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 43 transitions, 277 flow [2024-06-03 20:50:55,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:55,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:55,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:55,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:50:55,846 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:55,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash -881682337, now seen corresponding path program 3 times [2024-06-03 20:50:55,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:55,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186177572] [2024-06-03 20:50:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:55,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:56,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:56,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186177572] [2024-06-03 20:50:56,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186177572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:56,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:56,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:56,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846589289] [2024-06-03 20:50:56,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:56,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:56,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:56,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:56,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:56,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 43 transitions, 277 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:56,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:56,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:56,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:56,188 INFO L124 PetriNetUnfolderBase]: 83/195 cut-off events. [2024-06-03 20:50:56,188 INFO L125 PetriNetUnfolderBase]: For 2764/2764 co-relation queries the response was YES. [2024-06-03 20:50:56,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 195 events. 83/195 cut-off events. For 2764/2764 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 743 event pairs, 20 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 708. Up to 103 conditions per place. [2024-06-03 20:50:56,189 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 25 selfloop transitions, 15 changer transitions 9/55 dead transitions. [2024-06-03 20:50:56,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 55 transitions, 411 flow [2024-06-03 20:50:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-03 20:50:56,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-03 20:50:56,193 INFO L175 Difference]: Start difference. First operand has 79 places, 43 transitions, 277 flow. Second operand 10 states and 165 transitions. [2024-06-03 20:50:56,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 55 transitions, 411 flow [2024-06-03 20:50:56,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 356 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-03 20:50:56,196 INFO L231 Difference]: Finished difference. Result has 68 places, 40 transitions, 237 flow [2024-06-03 20:50:56,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=237, PETRI_PLACES=68, PETRI_TRANSITIONS=40} [2024-06-03 20:50:56,196 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2024-06-03 20:50:56,197 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 40 transitions, 237 flow [2024-06-03 20:50:56,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:56,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:56,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:56,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:50:56,197 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:56,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:56,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1246284399, now seen corresponding path program 4 times [2024-06-03 20:50:56,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:56,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486964048] [2024-06-03 20:50:56,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:56,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:56,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:56,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486964048] [2024-06-03 20:50:56,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486964048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:56,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:56,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:56,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427321200] [2024-06-03 20:50:56,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:56,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:56,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:56,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:56,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:56,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:56,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 40 transitions, 237 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:56,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:56,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:56,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:56,517 INFO L124 PetriNetUnfolderBase]: 96/230 cut-off events. [2024-06-03 20:50:56,517 INFO L125 PetriNetUnfolderBase]: For 2344/2344 co-relation queries the response was YES. [2024-06-03 20:50:56,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 230 events. 96/230 cut-off events. For 2344/2344 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 969 event pairs, 30 based on Foata normal form. 6/235 useless extension candidates. Maximal degree in co-relation 844. Up to 89 conditions per place. [2024-06-03 20:50:56,518 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 30 selfloop transitions, 13 changer transitions 7/56 dead transitions. [2024-06-03 20:50:56,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 56 transitions, 411 flow [2024-06-03 20:50:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-03 20:50:56,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-03 20:50:56,519 INFO L175 Difference]: Start difference. First operand has 68 places, 40 transitions, 237 flow. Second operand 10 states and 167 transitions. [2024-06-03 20:50:56,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 56 transitions, 411 flow [2024-06-03 20:50:56,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 56 transitions, 363 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 20:50:56,523 INFO L231 Difference]: Finished difference. Result has 64 places, 37 transitions, 204 flow [2024-06-03 20:50:56,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=204, PETRI_PLACES=64, PETRI_TRANSITIONS=37} [2024-06-03 20:50:56,523 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-06-03 20:50:56,523 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 37 transitions, 204 flow [2024-06-03 20:50:56,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:56,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:56,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:56,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:50:56,524 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:56,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash -873575825, now seen corresponding path program 5 times [2024-06-03 20:50:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:56,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38029607] [2024-06-03 20:50:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:56,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:56,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:56,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38029607] [2024-06-03 20:50:56,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38029607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:56,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:56,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:56,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333010792] [2024-06-03 20:50:56,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:56,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:56,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:56,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:56,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:56,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:56,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 37 transitions, 204 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:56,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:56,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:56,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:56,826 INFO L124 PetriNetUnfolderBase]: 71/173 cut-off events. [2024-06-03 20:50:56,826 INFO L125 PetriNetUnfolderBase]: For 1497/1497 co-relation queries the response was YES. [2024-06-03 20:50:56,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 173 events. 71/173 cut-off events. For 1497/1497 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 638 event pairs, 22 based on Foata normal form. 8/180 useless extension candidates. Maximal degree in co-relation 574. Up to 89 conditions per place. [2024-06-03 20:50:56,827 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 23 selfloop transitions, 12 changer transitions 9/50 dead transitions. [2024-06-03 20:50:56,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 50 transitions, 328 flow [2024-06-03 20:50:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-03 20:50:56,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:50:56,830 INFO L175 Difference]: Start difference. First operand has 64 places, 37 transitions, 204 flow. Second operand 11 states and 176 transitions. [2024-06-03 20:50:56,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 50 transitions, 328 flow [2024-06-03 20:50:56,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 50 transitions, 298 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 20:50:56,832 INFO L231 Difference]: Finished difference. Result has 62 places, 34 transitions, 182 flow [2024-06-03 20:50:56,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=182, PETRI_PLACES=62, PETRI_TRANSITIONS=34} [2024-06-03 20:50:56,832 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-06-03 20:50:56,832 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 34 transitions, 182 flow [2024-06-03 20:50:56,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:56,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:56,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:56,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:50:56,833 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:56,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash -878344369, now seen corresponding path program 6 times [2024-06-03 20:50:56,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:56,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249051055] [2024-06-03 20:50:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:56,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:57,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:57,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249051055] [2024-06-03 20:50:57,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249051055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:57,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:57,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:57,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124528910] [2024-06-03 20:50:57,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:57,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:57,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:57,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:57,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:57,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:57,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 34 transitions, 182 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:57,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:57,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:57,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:57,166 INFO L124 PetriNetUnfolderBase]: 77/191 cut-off events. [2024-06-03 20:50:57,167 INFO L125 PetriNetUnfolderBase]: For 1324/1324 co-relation queries the response was YES. [2024-06-03 20:50:57,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 191 events. 77/191 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 716 event pairs, 27 based on Foata normal form. 6/196 useless extension candidates. Maximal degree in co-relation 650. Up to 62 conditions per place. [2024-06-03 20:50:57,168 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 25 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2024-06-03 20:50:57,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 50 transitions, 334 flow [2024-06-03 20:50:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-03 20:50:57,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:50:57,169 INFO L175 Difference]: Start difference. First operand has 62 places, 34 transitions, 182 flow. Second operand 11 states and 176 transitions. [2024-06-03 20:50:57,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 50 transitions, 334 flow [2024-06-03 20:50:57,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 302 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 20:50:57,171 INFO L231 Difference]: Finished difference. Result has 59 places, 30 transitions, 151 flow [2024-06-03 20:50:57,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=151, PETRI_PLACES=59, PETRI_TRANSITIONS=30} [2024-06-03 20:50:57,171 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 28 predicate places. [2024-06-03 20:50:57,171 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 30 transitions, 151 flow [2024-06-03 20:50:57,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:57,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:57,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:57,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:50:57,172 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:57,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1009226351, now seen corresponding path program 6 times [2024-06-03 20:50:57,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:57,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711146678] [2024-06-03 20:50:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:57,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:57,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:57,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711146678] [2024-06-03 20:50:57,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711146678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:57,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:57,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:57,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438189037] [2024-06-03 20:50:57,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:57,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:57,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:57,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:57,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 30 transitions, 151 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:57,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:57,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:57,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:57,506 INFO L124 PetriNetUnfolderBase]: 69/169 cut-off events. [2024-06-03 20:50:57,507 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2024-06-03 20:50:57,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 169 events. 69/169 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 613 event pairs, 27 based on Foata normal form. 6/172 useless extension candidates. Maximal degree in co-relation 570. Up to 56 conditions per place. [2024-06-03 20:50:57,508 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 24 selfloop transitions, 6 changer transitions 6/42 dead transitions. [2024-06-03 20:50:57,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 42 transitions, 275 flow [2024-06-03 20:50:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:50:57,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:50:57,509 INFO L175 Difference]: Start difference. First operand has 59 places, 30 transitions, 151 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:50:57,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 42 transitions, 275 flow [2024-06-03 20:50:57,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 249 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 20:50:57,510 INFO L231 Difference]: Finished difference. Result has 51 places, 28 transitions, 132 flow [2024-06-03 20:50:57,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=132, PETRI_PLACES=51, PETRI_TRANSITIONS=28} [2024-06-03 20:50:57,511 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-06-03 20:50:57,511 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 28 transitions, 132 flow [2024-06-03 20:50:57,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:57,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:57,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:57,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:50:57,511 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:57,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:57,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1000655471, now seen corresponding path program 7 times [2024-06-03 20:50:57,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:57,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410216470] [2024-06-03 20:50:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:57,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:57,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:57,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410216470] [2024-06-03 20:50:57,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410216470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:57,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:57,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:57,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022544551] [2024-06-03 20:50:57,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:57,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:57,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:57,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:57,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 28 transitions, 132 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:57,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:57,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:57,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:57,822 INFO L124 PetriNetUnfolderBase]: 45/117 cut-off events. [2024-06-03 20:50:57,822 INFO L125 PetriNetUnfolderBase]: For 666/666 co-relation queries the response was YES. [2024-06-03 20:50:57,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 117 events. 45/117 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 334 event pairs, 19 based on Foata normal form. 8/122 useless extension candidates. Maximal degree in co-relation 352. Up to 52 conditions per place. [2024-06-03 20:50:57,823 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 16 selfloop transitions, 3 changer transitions 11/36 dead transitions. [2024-06-03 20:50:57,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 36 transitions, 212 flow [2024-06-03 20:50:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 20:50:57,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133928571428571 [2024-06-03 20:50:57,824 INFO L175 Difference]: Start difference. First operand has 51 places, 28 transitions, 132 flow. Second operand 7 states and 115 transitions. [2024-06-03 20:50:57,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 36 transitions, 212 flow [2024-06-03 20:50:57,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 36 transitions, 196 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:57,825 INFO L231 Difference]: Finished difference. Result has 50 places, 23 transitions, 92 flow [2024-06-03 20:50:57,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=92, PETRI_PLACES=50, PETRI_TRANSITIONS=23} [2024-06-03 20:50:57,826 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 19 predicate places. [2024-06-03 20:50:57,826 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 23 transitions, 92 flow [2024-06-03 20:50:57,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:57,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:57,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:57,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:50:57,826 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 20:50:57,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:57,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1808700817, now seen corresponding path program 8 times [2024-06-03 20:50:57,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:57,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445911481] [2024-06-03 20:50:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:57,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:58,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:58,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445911481] [2024-06-03 20:50:58,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445911481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:58,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:58,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:58,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439399108] [2024-06-03 20:50:58,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:58,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:58,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:58,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-03 20:50:58,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 23 transitions, 92 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:58,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:58,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-03 20:50:58,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:58,115 INFO L124 PetriNetUnfolderBase]: 20/66 cut-off events. [2024-06-03 20:50:58,115 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2024-06-03 20:50:58,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 66 events. 20/66 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 157. Up to 24 conditions per place. [2024-06-03 20:50:58,115 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2024-06-03 20:50:58,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 28 transitions, 130 flow [2024-06-03 20:50:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-03 20:50:58,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2024-06-03 20:50:58,116 INFO L175 Difference]: Start difference. First operand has 50 places, 23 transitions, 92 flow. Second operand 7 states and 107 transitions. [2024-06-03 20:50:58,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 28 transitions, 130 flow [2024-06-03 20:50:58,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 106 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 20:50:58,117 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2024-06-03 20:50:58,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2024-06-03 20:50:58,117 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-03 20:50:58,117 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2024-06-03 20:50:58,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:58,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-03 20:50:58,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-03 20:50:58,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-03 20:50:58,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-03 20:50:58,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:50:58,121 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2024-06-03 20:50:58,123 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 20:50:58,123 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 20:50:58,126 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-03 20:50:58,126 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-03 20:50:58,126 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 08:50:58 BasicIcfg [2024-06-03 20:50:58,126 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 20:50:58,127 INFO L158 Benchmark]: Toolchain (without parser) took 15241.96ms. Allocated memory was 190.8MB in the beginning and 553.6MB in the end (delta: 362.8MB). Free memory was 119.7MB in the beginning and 339.2MB in the end (delta: -219.5MB). Peak memory consumption was 144.4MB. Max. memory is 16.1GB. [2024-06-03 20:50:58,127 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 98.6MB. Free memory was 65.3MB in the beginning and 65.3MB in the end (delta: 26.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 20:50:58,127 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 190.8MB. Free memory is still 123.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 20:50:58,127 INFO L158 Benchmark]: CACSL2BoogieTranslator took 468.89ms. Allocated memory is still 190.8MB. Free memory was 119.7MB in the beginning and 140.8MB in the end (delta: -21.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-06-03 20:50:58,128 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.85ms. Allocated memory is still 190.8MB. Free memory was 140.8MB in the beginning and 138.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 20:50:58,128 INFO L158 Benchmark]: Boogie Preprocessor took 29.87ms. Allocated memory is still 190.8MB. Free memory was 138.7MB in the beginning and 136.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 20:50:58,128 INFO L158 Benchmark]: RCFGBuilder took 432.22ms. Allocated memory is still 190.8MB. Free memory was 136.6MB in the beginning and 106.2MB in the end (delta: 30.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-03 20:50:58,128 INFO L158 Benchmark]: TraceAbstraction took 14256.76ms. Allocated memory was 190.8MB in the beginning and 553.6MB in the end (delta: 362.8MB). Free memory was 106.2MB in the beginning and 339.2MB in the end (delta: -233.0MB). Peak memory consumption was 131.9MB. Max. memory is 16.1GB. [2024-06-03 20:50:58,129 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 98.6MB. Free memory was 65.3MB in the beginning and 65.3MB in the end (delta: 26.3kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 190.8MB. Free memory is still 123.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 468.89ms. Allocated memory is still 190.8MB. Free memory was 119.7MB in the beginning and 140.8MB in the end (delta: -21.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.85ms. Allocated memory is still 190.8MB. Free memory was 140.8MB in the beginning and 138.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.87ms. Allocated memory is still 190.8MB. Free memory was 138.7MB in the beginning and 136.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 432.22ms. Allocated memory is still 190.8MB. Free memory was 136.6MB in the beginning and 106.2MB in the end (delta: 30.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * TraceAbstraction took 14256.76ms. Allocated memory was 190.8MB in the beginning and 553.6MB in the end (delta: 362.8MB). Free memory was 106.2MB in the beginning and 339.2MB in the end (delta: -233.0MB). Peak memory consumption was 131.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 767]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 768]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 51 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.1s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2005 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1568 mSDsluCounter, 428 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 282 mSDsCounter, 180 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7121 IncrementalHoareTripleChecker+Invalid, 7301 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 180 mSolverCounterUnsat, 146 mSDtfsCounter, 7121 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 291 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=497occurred in iteration=22, InterpolantAutomatonStates: 315, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 672 NumberOfCodeBlocks, 672 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 631 ConstructedInterpolants, 0 QuantifiedInterpolants, 6318 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 41 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-03 20:50:58,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE