./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe013_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe013_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:40:19,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:40:19,447 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:40:19,450 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:40:19,451 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:40:19,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:40:19,481 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:40:19,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:40:19,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:40:19,482 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:40:19,483 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:40:19,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:40:19,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:40:19,484 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:40:19,484 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:40:19,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:40:19,484 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:40:19,485 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:40:19,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:40:19,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:40:19,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:40:19,496 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:40:19,496 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:40:19,496 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:40:19,497 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:40:19,497 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:40:19,497 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:40:19,497 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:40:19,498 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:40:19,498 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:40:19,498 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:40:19,498 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:40:19,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:40:19,499 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:40:19,499 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:40:19,499 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:40:19,499 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:40:19,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:40:19,500 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:40:19,500 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:40:19,500 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:40:19,500 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:40:19,500 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:40:19,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:40:19,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:40:19,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:40:19,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:40:19,736 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:40:19,737 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:40:19,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe013_tso.yml/witness.yml [2024-06-03 20:40:19,893 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:40:19,893 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:40:19,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-06-03 20:40:20,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:40:21,167 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:40:21,168 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-06-03 20:40:21,184 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f531bd863/beec3ad1306d4da8b4d7174ecb053c4c/FLAG6d84f50cc [2024-06-03 20:40:21,200 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f531bd863/beec3ad1306d4da8b4d7174ecb053c4c [2024-06-03 20:40:21,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:40:21,201 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:40:21,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:40:21,203 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:40:21,207 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:40:21,207 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:40:19" (1/2) ... [2024-06-03 20:40:21,208 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a562152 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:40:21, skipping insertion in model container [2024-06-03 20:40:21,208 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:40:19" (1/2) ... [2024-06-03 20:40:21,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@db8d312 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:40:21, skipping insertion in model container [2024-06-03 20:40:21,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:40:21" (2/2) ... [2024-06-03 20:40:21,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a562152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21, skipping insertion in model container [2024-06-03 20:40:21,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:40:21" (2/2) ... [2024-06-03 20:40:21,211 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:40:21,255 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:40:21,255 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-03 20:40:21,256 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-03 20:40:21,256 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-03 20:40:21,256 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:40:21,256 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-03 20:40:21,300 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:40:21,515 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:40:21,523 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:40:21,631 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:40:21,686 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:40:21,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21 WrapperNode [2024-06-03 20:40:21,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:40:21,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:40:21,689 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:40:21,689 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:40:21,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,727 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,763 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-03 20:40:21,763 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:40:21,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:40:21,764 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:40:21,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:40:21,773 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,782 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,800 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 20:40:21,801 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,801 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,812 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,817 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,823 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:40:21,828 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:40:21,829 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:40:21,829 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:40:21,830 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (1/1) ... [2024-06-03 20:40:21,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:40:21,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:40:21,882 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 20:40:21,898 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 20:40:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:40:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:40:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:40:21,923 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:40:21,923 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:40:21,923 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:40:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:40:21,924 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:40:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:40:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:40:21,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:40:21,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:40:21,925 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 20:40:22,022 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:40:22,024 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:40:22,345 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:40:22,346 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:40:22,450 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:40:22,450 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:40:22,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:40:22 BoogieIcfgContainer [2024-06-03 20:40:22,450 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:40:22,453 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:40:22,453 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:40:22,455 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:40:22,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:40:19" (1/4) ... [2024-06-03 20:40:22,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b2c362 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:40:22, skipping insertion in model container [2024-06-03 20:40:22,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:40:21" (2/4) ... [2024-06-03 20:40:22,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b2c362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:40:22, skipping insertion in model container [2024-06-03 20:40:22,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:40:21" (3/4) ... [2024-06-03 20:40:22,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b2c362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:40:22, skipping insertion in model container [2024-06-03 20:40:22,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:40:22" (4/4) ... [2024-06-03 20:40:22,458 INFO L112 eAbstractionObserver]: Analyzing ICFG safe013_tso.i [2024-06-03 20:40:22,471 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:40:22,472 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:40:22,472 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:40:22,518 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:40:22,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:40:22,573 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 20:40:22,573 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:40:22,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:40:22,575 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:40:22,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 20:40:22,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:40:22,593 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;@495bdbad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:40:22,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:40:22,597 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:40:22,597 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:40:22,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:40:22,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:22,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:40:22,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:22,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:22,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1787024188, now seen corresponding path program 1 times [2024-06-03 20:40:22,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:22,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369750029] [2024-06-03 20:40:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:22,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:23,074 INFO 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 20:40:23,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:23,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369750029] [2024-06-03 20:40:23,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369750029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:23,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:23,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:40:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668717031] [2024-06-03 20:40:23,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:23,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:40:23,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:40:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:40:23,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-03 20:40:23,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:23,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:23,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-03 20:40:23,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:23,436 INFO L124 PetriNetUnfolderBase]: 603/1013 cut-off events. [2024-06-03 20:40:23,436 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-03 20:40:23,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 1013 events. 603/1013 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5102 event pairs, 376 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 1992. Up to 929 conditions per place. [2024-06-03 20:40:23,449 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 20:40:23,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-03 20:40:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:40:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:40:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-03 20:40:23,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-06-03 20:40:23,460 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 85 transitions. [2024-06-03 20:40:23,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-03 20:40:23,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:23,465 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 20:40:23,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 20:40:23,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 20:40:23,469 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 20:40:23,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:23,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:23,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:23,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:40:23,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:23,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash 656708195, now seen corresponding path program 1 times [2024-06-03 20:40:23,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:23,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004056700] [2024-06-03 20:40:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:23,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:23,715 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 20:40:23,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:23,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004056700] [2024-06-03 20:40:23,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004056700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:23,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:23,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:40:23,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043587574] [2024-06-03 20:40:23,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:23,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:40:23,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:23,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:40:23,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:40:23,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-03 20:40:23,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 20:40:23,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:23,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-03 20:40:23,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:23,882 INFO L124 PetriNetUnfolderBase]: 604/1022 cut-off events. [2024-06-03 20:40:23,882 INFO L125 PetriNetUnfolderBase]: For 206/214 co-relation queries the response was YES. [2024-06-03 20:40:23,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2332 conditions, 1022 events. 604/1022 cut-off events. For 206/214 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5190 event pairs, 320 based on Foata normal form. 7/999 useless extension candidates. Maximal degree in co-relation 2317. Up to 903 conditions per place. [2024-06-03 20:40:23,887 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 39 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-03 20:40:23,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-03 20:40:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:40:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:40:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-03 20:40:23,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2024-06-03 20:40:23,889 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 115 transitions. [2024-06-03 20:40:23,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-03 20:40:23,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:40:23,891 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 174 flow [2024-06-03 20:40:23,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-03 20:40:23,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-03 20:40:23,892 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 174 flow [2024-06-03 20:40:23,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 20:40:23,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:23,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:23,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:40:23,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:23,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:23,893 INFO L85 PathProgramCache]: Analyzing trace with hash -365005390, now seen corresponding path program 1 times [2024-06-03 20:40:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:23,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427856372] [2024-06-03 20:40:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:23,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:24,294 INFO 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 20:40:24,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:24,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427856372] [2024-06-03 20:40:24,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427856372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:24,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:24,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:40:24,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937940718] [2024-06-03 20:40:24,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:24,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:40:24,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:40:24,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:40:24,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:24,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 20:40:24,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:24,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:24,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:24,462 INFO L124 PetriNetUnfolderBase]: 773/1282 cut-off events. [2024-06-03 20:40:24,462 INFO L125 PetriNetUnfolderBase]: For 880/898 co-relation queries the response was YES. [2024-06-03 20:40:24,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 1282 events. 773/1282 cut-off events. For 880/898 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6365 event pairs, 428 based on Foata normal form. 8/1287 useless extension candidates. Maximal degree in co-relation 3460. Up to 1172 conditions per place. [2024-06-03 20:40:24,469 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 43 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-03 20:40:24,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 316 flow [2024-06-03 20:40:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:40:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:40:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-03 20:40:24,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:40:24,470 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 174 flow. Second operand 4 states and 104 transitions. [2024-06-03 20:40:24,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 316 flow [2024-06-03 20:40:24,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 312 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 20:40:24,473 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 212 flow [2024-06-03 20:40:24,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-06-03 20:40:24,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-03 20:40:24,474 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 212 flow [2024-06-03 20:40:24,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 20:40:24,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:24,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:24,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:40:24,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:24,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash 102085025, now seen corresponding path program 1 times [2024-06-03 20:40:24,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:24,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566986751] [2024-06-03 20:40:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:24,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:24,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:24,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566986751] [2024-06-03 20:40:24,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566986751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:24,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:24,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:24,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163426459] [2024-06-03 20:40:24,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:24,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:24,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:24,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:24,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:24,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:24,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:24,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:24,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:24,973 INFO L124 PetriNetUnfolderBase]: 802/1336 cut-off events. [2024-06-03 20:40:24,974 INFO L125 PetriNetUnfolderBase]: For 1487/1508 co-relation queries the response was YES. [2024-06-03 20:40:24,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3947 conditions, 1336 events. 802/1336 cut-off events. For 1487/1508 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6717 event pairs, 229 based on Foata normal form. 23/1353 useless extension candidates. Maximal degree in co-relation 3926. Up to 1101 conditions per place. [2024-06-03 20:40:24,981 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-06-03 20:40:24,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 83 transitions, 474 flow [2024-06-03 20:40:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-03 20:40:24,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468253968253969 [2024-06-03 20:40:24,986 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 212 flow. Second operand 6 states and 163 transitions. [2024-06-03 20:40:24,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 83 transitions, 474 flow [2024-06-03 20:40:24,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 83 transitions, 456 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:24,992 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 274 flow [2024-06-03 20:40:24,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-03 20:40:24,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-03 20:40:24,994 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 274 flow [2024-06-03 20:40:24,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:24,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:24,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:24,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:40:24,995 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:24,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1547392333, now seen corresponding path program 1 times [2024-06-03 20:40:24,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:24,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900909328] [2024-06-03 20:40:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:24,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:25,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:25,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900909328] [2024-06-03 20:40:25,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900909328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:25,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:25,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:40:25,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276283765] [2024-06-03 20:40:25,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:25,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:40:25,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:25,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:40:25,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:40:25,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:25,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:25,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:25,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:25,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:25,501 INFO L124 PetriNetUnfolderBase]: 950/1576 cut-off events. [2024-06-03 20:40:25,501 INFO L125 PetriNetUnfolderBase]: For 2550/2550 co-relation queries the response was YES. [2024-06-03 20:40:25,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5019 conditions, 1576 events. 950/1576 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8120 event pairs, 374 based on Foata normal form. 2/1575 useless extension candidates. Maximal degree in co-relation 4996. Up to 1425 conditions per place. [2024-06-03 20:40:25,510 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-03 20:40:25,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 496 flow [2024-06-03 20:40:25,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-03 20:40:25,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-06-03 20:40:25,511 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 274 flow. Second operand 5 states and 121 transitions. [2024-06-03 20:40:25,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 496 flow [2024-06-03 20:40:25,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 456 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:25,514 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 330 flow [2024-06-03 20:40:25,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2024-06-03 20:40:25,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-03 20:40:25,515 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 330 flow [2024-06-03 20:40:25,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:25,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:25,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:25,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:40:25,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:25,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:25,517 INFO L85 PathProgramCache]: Analyzing trace with hash 717847715, now seen corresponding path program 1 times [2024-06-03 20:40:25,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:25,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574328295] [2024-06-03 20:40:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:25,749 INFO 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 20:40:25,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:25,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574328295] [2024-06-03 20:40:25,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574328295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:25,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:25,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:40:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522417420] [2024-06-03 20:40:25,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:25,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:40:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:40:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:40:25,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:25,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:40:25,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:25,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:25,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:25,940 INFO L124 PetriNetUnfolderBase]: 918/1520 cut-off events. [2024-06-03 20:40:25,940 INFO L125 PetriNetUnfolderBase]: For 3420/3452 co-relation queries the response was YES. [2024-06-03 20:40:25,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 1520 events. 918/1520 cut-off events. For 3420/3452 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7799 event pairs, 311 based on Foata normal form. 15/1517 useless extension candidates. Maximal degree in co-relation 5209. Up to 1303 conditions per place. [2024-06-03 20:40:25,950 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 25 changer transitions 0/96 dead transitions. [2024-06-03 20:40:25,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 660 flow [2024-06-03 20:40:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-03 20:40:25,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6523809523809524 [2024-06-03 20:40:25,952 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 330 flow. Second operand 5 states and 137 transitions. [2024-06-03 20:40:25,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 660 flow [2024-06-03 20:40:25,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 96 transitions, 654 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-03 20:40:25,957 INFO L231 Difference]: Finished difference. Result has 65 places, 74 transitions, 482 flow [2024-06-03 20:40:25,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=482, PETRI_PLACES=65, PETRI_TRANSITIONS=74} [2024-06-03 20:40:25,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-03 20:40:25,958 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 74 transitions, 482 flow [2024-06-03 20:40:25,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:40:25,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:25,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:25,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:40:25,958 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:25,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1440391685, now seen corresponding path program 2 times [2024-06-03 20:40:25,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:25,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119810553] [2024-06-03 20:40:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:26,190 INFO 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 20:40:26,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:26,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119810553] [2024-06-03 20:40:26,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119810553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:26,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:26,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:40:26,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411632648] [2024-06-03 20:40:26,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:26,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:40:26,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:26,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:40:26,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:40:26,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:26,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 482 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:40:26,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:26,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:26,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:26,378 INFO L124 PetriNetUnfolderBase]: 932/1542 cut-off events. [2024-06-03 20:40:26,379 INFO L125 PetriNetUnfolderBase]: For 5056/5084 co-relation queries the response was YES. [2024-06-03 20:40:26,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6004 conditions, 1542 events. 932/1542 cut-off events. For 5056/5084 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7964 event pairs, 311 based on Foata normal form. 15/1542 useless extension candidates. Maximal degree in co-relation 5974. Up to 1328 conditions per place. [2024-06-03 20:40:26,389 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 24 changer transitions 0/93 dead transitions. [2024-06-03 20:40:26,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 93 transitions, 726 flow [2024-06-03 20:40:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-03 20:40:26,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-03 20:40:26,391 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 482 flow. Second operand 5 states and 132 transitions. [2024-06-03 20:40:26,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 93 transitions, 726 flow [2024-06-03 20:40:26,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 698 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-03 20:40:26,398 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 538 flow [2024-06-03 20:40:26,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=538, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2024-06-03 20:40:26,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-03 20:40:26,399 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 538 flow [2024-06-03 20:40:26,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 20:40:26,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:26,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:26,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:40:26,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:26,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:26,400 INFO L85 PathProgramCache]: Analyzing trace with hash 376205262, now seen corresponding path program 1 times [2024-06-03 20:40:26,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:26,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511847480] [2024-06-03 20:40:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:26,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:26,659 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 20:40:26,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:26,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511847480] [2024-06-03 20:40:26,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511847480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:26,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:26,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:26,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673919600] [2024-06-03 20:40:26,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:26,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:26,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:26,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:26,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:26,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:26,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:26,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:26,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:26,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:26,873 INFO L124 PetriNetUnfolderBase]: 983/1632 cut-off events. [2024-06-03 20:40:26,873 INFO L125 PetriNetUnfolderBase]: For 5761/5764 co-relation queries the response was YES. [2024-06-03 20:40:26,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6292 conditions, 1632 events. 983/1632 cut-off events. For 5761/5764 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8390 event pairs, 347 based on Foata normal form. 2/1629 useless extension candidates. Maximal degree in co-relation 6258. Up to 1415 conditions per place. [2024-06-03 20:40:26,884 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 86 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-03 20:40:26,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 113 transitions, 918 flow [2024-06-03 20:40:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:40:26,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-03 20:40:26,886 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 538 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:40:26,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 113 transitions, 918 flow [2024-06-03 20:40:26,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 858 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:26,894 INFO L231 Difference]: Finished difference. Result has 76 places, 88 transitions, 630 flow [2024-06-03 20:40:26,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=630, PETRI_PLACES=76, PETRI_TRANSITIONS=88} [2024-06-03 20:40:26,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-03 20:40:26,895 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 88 transitions, 630 flow [2024-06-03 20:40:26,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:26,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:26,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:26,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:40:26,895 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:26,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash -761795358, now seen corresponding path program 2 times [2024-06-03 20:40:26,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:26,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408753647] [2024-06-03 20:40:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:26,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:27,135 INFO 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 20:40:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408753647] [2024-06-03 20:40:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408753647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:27,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:27,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653899935] [2024-06-03 20:40:27,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:27,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:27,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:27,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:27,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:27,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 88 transitions, 630 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:27,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:27,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:27,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:27,342 INFO L124 PetriNetUnfolderBase]: 994/1648 cut-off events. [2024-06-03 20:40:27,342 INFO L125 PetriNetUnfolderBase]: For 6980/6980 co-relation queries the response was YES. [2024-06-03 20:40:27,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6701 conditions, 1648 events. 994/1648 cut-off events. For 6980/6980 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8490 event pairs, 346 based on Foata normal form. 2/1644 useless extension candidates. Maximal degree in co-relation 6664. Up to 1427 conditions per place. [2024-06-03 20:40:27,353 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 83 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-06-03 20:40:27,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 114 transitions, 961 flow [2024-06-03 20:40:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:40:27,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:40:27,355 INFO L175 Difference]: Start difference. First operand has 76 places, 88 transitions, 630 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:40:27,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 114 transitions, 961 flow [2024-06-03 20:40:27,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 929 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:27,365 INFO L231 Difference]: Finished difference. Result has 81 places, 93 transitions, 696 flow [2024-06-03 20:40:27,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=696, PETRI_PLACES=81, PETRI_TRANSITIONS=93} [2024-06-03 20:40:27,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-03 20:40:27,366 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 93 transitions, 696 flow [2024-06-03 20:40:27,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:27,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:27,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:27,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:40:27,367 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:27,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:27,367 INFO L85 PathProgramCache]: Analyzing trace with hash 982390590, now seen corresponding path program 3 times [2024-06-03 20:40:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:27,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248776229] [2024-06-03 20:40:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:27,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:27,608 INFO 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 20:40:27,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:27,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248776229] [2024-06-03 20:40:27,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248776229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:27,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:27,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:27,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169990638] [2024-06-03 20:40:27,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:27,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:27,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:27,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:27,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 93 transitions, 696 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:27,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:27,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:27,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:27,852 INFO L124 PetriNetUnfolderBase]: 989/1641 cut-off events. [2024-06-03 20:40:27,852 INFO L125 PetriNetUnfolderBase]: For 7977/7977 co-relation queries the response was YES. [2024-06-03 20:40:27,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6815 conditions, 1641 events. 989/1641 cut-off events. For 7977/7977 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8419 event pairs, 346 based on Foata normal form. 2/1637 useless extension candidates. Maximal degree in co-relation 6776. Up to 1422 conditions per place. [2024-06-03 20:40:27,912 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 80 selfloop transitions, 26 changer transitions 0/113 dead transitions. [2024-06-03 20:40:27,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 113 transitions, 964 flow [2024-06-03 20:40:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:40:27,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-03 20:40:27,929 INFO L175 Difference]: Start difference. First operand has 81 places, 93 transitions, 696 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:40:27,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 113 transitions, 964 flow [2024-06-03 20:40:27,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 113 transitions, 926 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:27,947 INFO L231 Difference]: Finished difference. Result has 85 places, 94 transitions, 726 flow [2024-06-03 20:40:27,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=726, PETRI_PLACES=85, PETRI_TRANSITIONS=94} [2024-06-03 20:40:27,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-03 20:40:27,948 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 94 transitions, 726 flow [2024-06-03 20:40:27,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:27,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:27,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:27,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:40:27,949 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:27,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:27,949 INFO L85 PathProgramCache]: Analyzing trace with hash 985373740, now seen corresponding path program 1 times [2024-06-03 20:40:27,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:27,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790774769] [2024-06-03 20:40:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:27,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:28,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:28,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790774769] [2024-06-03 20:40:28,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790774769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:28,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:28,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:28,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035917282] [2024-06-03 20:40:28,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:28,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:28,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:28,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:28,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:28,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:28,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 94 transitions, 726 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:28,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:28,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:28,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:28,446 INFO L124 PetriNetUnfolderBase]: 981/1634 cut-off events. [2024-06-03 20:40:28,447 INFO L125 PetriNetUnfolderBase]: For 9181/9181 co-relation queries the response was YES. [2024-06-03 20:40:28,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6878 conditions, 1634 events. 981/1634 cut-off events. For 9181/9181 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8407 event pairs, 323 based on Foata normal form. 4/1635 useless extension candidates. Maximal degree in co-relation 6837. Up to 1452 conditions per place. [2024-06-03 20:40:28,457 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 97 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2024-06-03 20:40:28,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 116 transitions, 1010 flow [2024-06-03 20:40:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 20:40:28,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:40:28,459 INFO L175 Difference]: Start difference. First operand has 85 places, 94 transitions, 726 flow. Second operand 6 states and 142 transitions. [2024-06-03 20:40:28,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 116 transitions, 1010 flow [2024-06-03 20:40:28,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 116 transitions, 970 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:28,471 INFO L231 Difference]: Finished difference. Result has 88 places, 96 transitions, 737 flow [2024-06-03 20:40:28,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=737, PETRI_PLACES=88, PETRI_TRANSITIONS=96} [2024-06-03 20:40:28,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-03 20:40:28,471 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 96 transitions, 737 flow [2024-06-03 20:40:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:28,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:28,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:40:28,472 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:28,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1642823934, now seen corresponding path program 1 times [2024-06-03 20:40:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:28,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567535598] [2024-06-03 20:40:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:28,754 INFO 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 20:40:28,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:28,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567535598] [2024-06-03 20:40:28,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567535598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:28,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:28,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:28,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398335279] [2024-06-03 20:40:28,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:28,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:28,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:28,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:28,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:28,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:28,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 96 transitions, 737 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 20:40:28,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:28,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:28,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:29,036 INFO L124 PetriNetUnfolderBase]: 954/1593 cut-off events. [2024-06-03 20:40:29,037 INFO L125 PetriNetUnfolderBase]: For 11646/11666 co-relation queries the response was YES. [2024-06-03 20:40:29,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7068 conditions, 1593 events. 954/1593 cut-off events. For 11646/11666 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8291 event pairs, 280 based on Foata normal form. 18/1563 useless extension candidates. Maximal degree in co-relation 7026. Up to 1328 conditions per place. [2024-06-03 20:40:29,048 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-03 20:40:29,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 119 transitions, 1037 flow [2024-06-03 20:40:29,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-03 20:40:29,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-03 20:40:29,050 INFO L175 Difference]: Start difference. First operand has 88 places, 96 transitions, 737 flow. Second operand 5 states and 136 transitions. [2024-06-03 20:40:29,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 119 transitions, 1037 flow [2024-06-03 20:40:29,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 119 transitions, 1004 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:29,061 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 815 flow [2024-06-03 20:40:29,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=815, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-03 20:40:29,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-03 20:40:29,062 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 815 flow [2024-06-03 20:40:29,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 20:40:29,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:29,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:29,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:40:29,063 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:29,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:29,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1638062334, now seen corresponding path program 2 times [2024-06-03 20:40:29,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:29,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785489074] [2024-06-03 20:40:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:29,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:29,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:29,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785489074] [2024-06-03 20:40:29,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785489074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:29,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:29,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:29,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487127617] [2024-06-03 20:40:29,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:29,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:29,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:29,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:29,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:29,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:29,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 815 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 20:40:29,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:29,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:29,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:29,599 INFO L124 PetriNetUnfolderBase]: 982/1647 cut-off events. [2024-06-03 20:40:29,599 INFO L125 PetriNetUnfolderBase]: For 13820/13846 co-relation queries the response was YES. [2024-06-03 20:40:29,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7753 conditions, 1647 events. 982/1647 cut-off events. For 13820/13846 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8700 event pairs, 281 based on Foata normal form. 25/1620 useless extension candidates. Maximal degree in co-relation 7710. Up to 1275 conditions per place. [2024-06-03 20:40:29,611 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 53 changer transitions 0/149 dead transitions. [2024-06-03 20:40:29,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 1361 flow [2024-06-03 20:40:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-03 20:40:29,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-03 20:40:29,613 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 815 flow. Second operand 9 states and 231 transitions. [2024-06-03 20:40:29,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 1361 flow [2024-06-03 20:40:29,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 149 transitions, 1282 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:29,633 INFO L231 Difference]: Finished difference. Result has 94 places, 111 transitions, 962 flow [2024-06-03 20:40:29,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=962, PETRI_PLACES=94, PETRI_TRANSITIONS=111} [2024-06-03 20:40:29,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-03 20:40:29,634 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 111 transitions, 962 flow [2024-06-03 20:40:29,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 20:40:29,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:29,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:29,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:40:29,635 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:29,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:29,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1236958180, now seen corresponding path program 3 times [2024-06-03 20:40:29,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:29,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860182434] [2024-06-03 20:40:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:29,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:29,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860182434] [2024-06-03 20:40:29,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860182434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:29,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:29,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:29,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99972014] [2024-06-03 20:40:29,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:29,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:29,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:29,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:29,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:29,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 111 transitions, 962 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 20:40:29,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:29,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:29,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:30,164 INFO L124 PetriNetUnfolderBase]: 973/1632 cut-off events. [2024-06-03 20:40:30,164 INFO L125 PetriNetUnfolderBase]: For 14544/14574 co-relation queries the response was YES. [2024-06-03 20:40:30,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8008 conditions, 1632 events. 973/1632 cut-off events. For 14544/14574 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8638 event pairs, 284 based on Foata normal form. 31/1611 useless extension candidates. Maximal degree in co-relation 7965. Up to 1268 conditions per place. [2024-06-03 20:40:30,175 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 49 changer transitions 0/145 dead transitions. [2024-06-03 20:40:30,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 145 transitions, 1396 flow [2024-06-03 20:40:30,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:40:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:40:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-03 20:40:30,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-03 20:40:30,177 INFO L175 Difference]: Start difference. First operand has 94 places, 111 transitions, 962 flow. Second operand 8 states and 206 transitions. [2024-06-03 20:40:30,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 145 transitions, 1396 flow [2024-06-03 20:40:30,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 145 transitions, 1278 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:30,192 INFO L231 Difference]: Finished difference. Result has 98 places, 111 transitions, 952 flow [2024-06-03 20:40:30,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=952, PETRI_PLACES=98, PETRI_TRANSITIONS=111} [2024-06-03 20:40:30,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-03 20:40:30,192 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 111 transitions, 952 flow [2024-06-03 20:40:30,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 20:40:30,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:30,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:30,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:40:30,193 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:30,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash -371459253, now seen corresponding path program 1 times [2024-06-03 20:40:30,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:30,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189248557] [2024-06-03 20:40:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:30,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:30,418 INFO 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 20:40:30,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:30,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189248557] [2024-06-03 20:40:30,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189248557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:30,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:30,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:40:30,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713207596] [2024-06-03 20:40:30,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:30,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:40:30,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:30,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:40:30,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:40:30,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:30,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 111 transitions, 952 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 20:40:30,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:30,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:30,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:30,615 INFO L124 PetriNetUnfolderBase]: 942/1583 cut-off events. [2024-06-03 20:40:30,615 INFO L125 PetriNetUnfolderBase]: For 13496/13501 co-relation queries the response was YES. [2024-06-03 20:40:30,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7694 conditions, 1583 events. 942/1583 cut-off events. For 13496/13501 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8345 event pairs, 288 based on Foata normal form. 7/1580 useless extension candidates. Maximal degree in co-relation 7649. Up to 1339 conditions per place. [2024-06-03 20:40:30,626 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 83 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-06-03 20:40:30,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1180 flow [2024-06-03 20:40:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:40:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:40:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-03 20:40:30,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-03 20:40:30,627 INFO L175 Difference]: Start difference. First operand has 98 places, 111 transitions, 952 flow. Second operand 4 states and 103 transitions. [2024-06-03 20:40:30,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1180 flow [2024-06-03 20:40:30,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 120 transitions, 1075 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:30,642 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 894 flow [2024-06-03 20:40:30,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=894, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-06-03 20:40:30,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-03 20:40:30,643 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 894 flow [2024-06-03 20:40:30,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 20:40:30,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:30,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:30,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:40:30,643 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:30,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash 433892943, now seen corresponding path program 1 times [2024-06-03 20:40:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087691117] [2024-06-03 20:40:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:30,889 INFO 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 20:40:30,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:30,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087691117] [2024-06-03 20:40:30,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087691117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:30,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:30,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:30,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451756450] [2024-06-03 20:40:30,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:30,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:30,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:30,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:30,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:30,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:30,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 894 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:30,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:30,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:30,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:31,154 INFO L124 PetriNetUnfolderBase]: 1008/1672 cut-off events. [2024-06-03 20:40:31,154 INFO L125 PetriNetUnfolderBase]: For 14546/14546 co-relation queries the response was YES. [2024-06-03 20:40:31,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8021 conditions, 1672 events. 1008/1672 cut-off events. For 14546/14546 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8595 event pairs, 295 based on Foata normal form. 2/1671 useless extension candidates. Maximal degree in co-relation 7976. Up to 1476 conditions per place. [2024-06-03 20:40:31,165 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 126 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2024-06-03 20:40:31,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 149 transitions, 1318 flow [2024-06-03 20:40:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:40:31,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-03 20:40:31,167 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 894 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:40:31,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 149 transitions, 1318 flow [2024-06-03 20:40:31,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 1270 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:31,183 INFO L231 Difference]: Finished difference. Result has 102 places, 120 transitions, 974 flow [2024-06-03 20:40:31,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=102, PETRI_TRANSITIONS=120} [2024-06-03 20:40:31,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-03 20:40:31,184 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 120 transitions, 974 flow [2024-06-03 20:40:31,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:31,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:31,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:31,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:40:31,184 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:31,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash 759675983, now seen corresponding path program 2 times [2024-06-03 20:40:31,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:31,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757663868] [2024-06-03 20:40:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:31,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:31,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757663868] [2024-06-03 20:40:31,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757663868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:31,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:31,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:31,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007032948] [2024-06-03 20:40:31,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:31,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:31,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:31,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:31,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 120 transitions, 974 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:31,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:31,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:31,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:31,785 INFO L124 PetriNetUnfolderBase]: 1035/1719 cut-off events. [2024-06-03 20:40:31,785 INFO L125 PetriNetUnfolderBase]: For 16863/16866 co-relation queries the response was YES. [2024-06-03 20:40:31,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8614 conditions, 1719 events. 1035/1719 cut-off events. For 16863/16866 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8850 event pairs, 303 based on Foata normal form. 2/1716 useless extension candidates. Maximal degree in co-relation 8567. Up to 1393 conditions per place. [2024-06-03 20:40:31,799 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 123 selfloop transitions, 44 changer transitions 0/174 dead transitions. [2024-06-03 20:40:31,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 174 transitions, 1626 flow [2024-06-03 20:40:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-03 20:40:31,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-03 20:40:31,801 INFO L175 Difference]: Start difference. First operand has 102 places, 120 transitions, 974 flow. Second operand 9 states and 224 transitions. [2024-06-03 20:40:31,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 174 transitions, 1626 flow [2024-06-03 20:40:31,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 174 transitions, 1580 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:31,823 INFO L231 Difference]: Finished difference. Result has 110 places, 132 transitions, 1149 flow [2024-06-03 20:40:31,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1149, PETRI_PLACES=110, PETRI_TRANSITIONS=132} [2024-06-03 20:40:31,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-03 20:40:31,824 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 132 transitions, 1149 flow [2024-06-03 20:40:31,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:31,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:31,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:31,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:40:31,824 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:31,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:31,825 INFO L85 PathProgramCache]: Analyzing trace with hash 538136321, now seen corresponding path program 3 times [2024-06-03 20:40:31,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:31,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237310452] [2024-06-03 20:40:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:31,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:32,056 INFO 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 20:40:32,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:32,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237310452] [2024-06-03 20:40:32,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237310452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:32,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:32,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:32,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130820923] [2024-06-03 20:40:32,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:32,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:32,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:32,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:32,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:32,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:32,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 1149 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:32,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:32,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:32,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:32,359 INFO L124 PetriNetUnfolderBase]: 1030/1712 cut-off events. [2024-06-03 20:40:32,360 INFO L125 PetriNetUnfolderBase]: For 19141/19144 co-relation queries the response was YES. [2024-06-03 20:40:32,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9073 conditions, 1712 events. 1030/1712 cut-off events. For 19141/19144 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8869 event pairs, 303 based on Foata normal form. 2/1709 useless extension candidates. Maximal degree in co-relation 9023. Up to 1388 conditions per place. [2024-06-03 20:40:32,372 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 123 selfloop transitions, 47 changer transitions 0/177 dead transitions. [2024-06-03 20:40:32,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 177 transitions, 1675 flow [2024-06-03 20:40:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:40:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:40:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-03 20:40:32,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:40:32,374 INFO L175 Difference]: Start difference. First operand has 110 places, 132 transitions, 1149 flow. Second operand 10 states and 240 transitions. [2024-06-03 20:40:32,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 177 transitions, 1675 flow [2024-06-03 20:40:32,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 177 transitions, 1591 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:32,395 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 1178 flow [2024-06-03 20:40:32,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1178, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2024-06-03 20:40:32,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-03 20:40:32,396 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 1178 flow [2024-06-03 20:40:32,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:32,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:32,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:32,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:40:32,396 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:32,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:32,397 INFO L85 PathProgramCache]: Analyzing trace with hash 538144257, now seen corresponding path program 1 times [2024-06-03 20:40:32,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:32,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004902910] [2024-06-03 20:40:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:32,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:32,648 INFO 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 20:40:32,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:32,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004902910] [2024-06-03 20:40:32,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004902910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:32,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:32,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:32,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794876670] [2024-06-03 20:40:32,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:32,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:32,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:32,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:32,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 1178 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:32,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:32,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:32,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:32,915 INFO L124 PetriNetUnfolderBase]: 1047/1739 cut-off events. [2024-06-03 20:40:32,915 INFO L125 PetriNetUnfolderBase]: For 21159/21162 co-relation queries the response was YES. [2024-06-03 20:40:32,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9327 conditions, 1739 events. 1047/1739 cut-off events. For 21159/21162 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8978 event pairs, 299 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 9275. Up to 1487 conditions per place. [2024-06-03 20:40:32,934 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 128 selfloop transitions, 27 changer transitions 0/162 dead transitions. [2024-06-03 20:40:32,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 162 transitions, 1570 flow [2024-06-03 20:40:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:40:32,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 20:40:32,936 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 1178 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:40:32,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 162 transitions, 1570 flow [2024-06-03 20:40:32,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 162 transitions, 1486 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:40:32,958 INFO L231 Difference]: Finished difference. Result has 116 places, 135 transitions, 1173 flow [2024-06-03 20:40:32,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1173, PETRI_PLACES=116, PETRI_TRANSITIONS=135} [2024-06-03 20:40:32,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-03 20:40:32,959 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 135 transitions, 1173 flow [2024-06-03 20:40:32,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:32,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:32,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:32,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:40:32,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:32,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1933730671, now seen corresponding path program 4 times [2024-06-03 20:40:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:32,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992126524] [2024-06-03 20:40:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:32,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:33,202 INFO 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 20:40:33,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:33,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992126524] [2024-06-03 20:40:33,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992126524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:33,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:33,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:33,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761063767] [2024-06-03 20:40:33,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:33,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:33,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:33,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:33,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:33,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:33,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 135 transitions, 1173 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:33,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:33,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:33,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:33,532 INFO L124 PetriNetUnfolderBase]: 1058/1755 cut-off events. [2024-06-03 20:40:33,533 INFO L125 PetriNetUnfolderBase]: For 22641/22641 co-relation queries the response was YES. [2024-06-03 20:40:33,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9576 conditions, 1755 events. 1058/1755 cut-off events. For 22641/22641 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9090 event pairs, 300 based on Foata normal form. 2/1751 useless extension candidates. Maximal degree in co-relation 9523. Up to 1427 conditions per place. [2024-06-03 20:40:33,544 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 53 changer transitions 0/180 dead transitions. [2024-06-03 20:40:33,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 180 transitions, 1734 flow [2024-06-03 20:40:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:40:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:40:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-03 20:40:33,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-03 20:40:33,547 INFO L175 Difference]: Start difference. First operand has 116 places, 135 transitions, 1173 flow. Second operand 10 states and 234 transitions. [2024-06-03 20:40:33,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 180 transitions, 1734 flow [2024-06-03 20:40:33,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 180 transitions, 1673 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:33,568 INFO L231 Difference]: Finished difference. Result has 122 places, 140 transitions, 1285 flow [2024-06-03 20:40:33,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1285, PETRI_PLACES=122, PETRI_TRANSITIONS=140} [2024-06-03 20:40:33,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-03 20:40:33,569 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 140 transitions, 1285 flow [2024-06-03 20:40:33,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:33,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:33,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:33,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:40:33,570 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:33,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:33,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1071930433, now seen corresponding path program 5 times [2024-06-03 20:40:33,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:33,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399142959] [2024-06-03 20:40:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:33,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:33,797 INFO 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 20:40:33,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:33,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399142959] [2024-06-03 20:40:33,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399142959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:33,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:33,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:33,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138863237] [2024-06-03 20:40:33,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:33,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:33,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:33,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:33,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 140 transitions, 1285 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:33,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:33,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:33,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:34,108 INFO L124 PetriNetUnfolderBase]: 1069/1776 cut-off events. [2024-06-03 20:40:34,108 INFO L125 PetriNetUnfolderBase]: For 25017/25017 co-relation queries the response was YES. [2024-06-03 20:40:34,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9932 conditions, 1776 events. 1069/1776 cut-off events. For 25017/25017 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9231 event pairs, 300 based on Foata normal form. 2/1772 useless extension candidates. Maximal degree in co-relation 9877. Up to 1439 conditions per place. [2024-06-03 20:40:34,122 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 127 selfloop transitions, 53 changer transitions 0/187 dead transitions. [2024-06-03 20:40:34,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 187 transitions, 1866 flow [2024-06-03 20:40:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:40:34,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:40:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-03 20:40:34,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-03 20:40:34,125 INFO L175 Difference]: Start difference. First operand has 122 places, 140 transitions, 1285 flow. Second operand 11 states and 258 transitions. [2024-06-03 20:40:34,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 187 transitions, 1866 flow [2024-06-03 20:40:34,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 187 transitions, 1764 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:34,157 INFO L231 Difference]: Finished difference. Result has 127 places, 143 transitions, 1334 flow [2024-06-03 20:40:34,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1334, PETRI_PLACES=127, PETRI_TRANSITIONS=143} [2024-06-03 20:40:34,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-03 20:40:34,158 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 143 transitions, 1334 flow [2024-06-03 20:40:34,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:34,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:34,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:34,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:40:34,159 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:34,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:34,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1785136207, now seen corresponding path program 6 times [2024-06-03 20:40:34,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:34,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440219811] [2024-06-03 20:40:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:34,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:34,381 INFO 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 20:40:34,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:34,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440219811] [2024-06-03 20:40:34,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440219811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:34,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:34,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:34,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733733228] [2024-06-03 20:40:34,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:34,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:34,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:34,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:34,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 143 transitions, 1334 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:34,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:34,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:34,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:34,680 INFO L124 PetriNetUnfolderBase]: 1064/1769 cut-off events. [2024-06-03 20:40:34,680 INFO L125 PetriNetUnfolderBase]: For 26801/26801 co-relation queries the response was YES. [2024-06-03 20:40:34,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9952 conditions, 1769 events. 1064/1769 cut-off events. For 26801/26801 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9190 event pairs, 300 based on Foata normal form. 2/1765 useless extension candidates. Maximal degree in co-relation 9896. Up to 1434 conditions per place. [2024-06-03 20:40:34,693 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 52 changer transitions 0/177 dead transitions. [2024-06-03 20:40:34,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 177 transitions, 1760 flow [2024-06-03 20:40:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-03 20:40:34,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-03 20:40:34,695 INFO L175 Difference]: Start difference. First operand has 127 places, 143 transitions, 1334 flow. Second operand 9 states and 214 transitions. [2024-06-03 20:40:34,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 177 transitions, 1760 flow [2024-06-03 20:40:34,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 177 transitions, 1594 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-03 20:40:34,725 INFO L231 Difference]: Finished difference. Result has 126 places, 143 transitions, 1280 flow [2024-06-03 20:40:34,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1280, PETRI_PLACES=126, PETRI_TRANSITIONS=143} [2024-06-03 20:40:34,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-03 20:40:34,725 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 143 transitions, 1280 flow [2024-06-03 20:40:34,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:34,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:34,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:34,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:40:34,726 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:34,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1785351533, now seen corresponding path program 2 times [2024-06-03 20:40:34,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:34,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977630156] [2024-06-03 20:40:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:34,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:34,933 INFO 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 20:40:34,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:34,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977630156] [2024-06-03 20:40:34,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977630156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:34,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:34,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:34,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697240309] [2024-06-03 20:40:34,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:34,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:34,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:34,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:34,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:34,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:34,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 143 transitions, 1280 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:34,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:34,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:34,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:35,197 INFO L124 PetriNetUnfolderBase]: 1081/1796 cut-off events. [2024-06-03 20:40:35,202 INFO L125 PetriNetUnfolderBase]: For 29288/29288 co-relation queries the response was YES. [2024-06-03 20:40:35,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10055 conditions, 1796 events. 1081/1796 cut-off events. For 29288/29288 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9347 event pairs, 300 based on Foata normal form. 4/1794 useless extension candidates. Maximal degree in co-relation 9999. Up to 1539 conditions per place. [2024-06-03 20:40:35,213 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 135 selfloop transitions, 27 changer transitions 0/169 dead transitions. [2024-06-03 20:40:35,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 169 transitions, 1682 flow [2024-06-03 20:40:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:40:35,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-03 20:40:35,214 INFO L175 Difference]: Start difference. First operand has 126 places, 143 transitions, 1280 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:40:35,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 169 transitions, 1682 flow [2024-06-03 20:40:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 169 transitions, 1578 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:40:35,251 INFO L231 Difference]: Finished difference. Result has 125 places, 145 transitions, 1259 flow [2024-06-03 20:40:35,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1259, PETRI_PLACES=125, PETRI_TRANSITIONS=145} [2024-06-03 20:40:35,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-03 20:40:35,251 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 145 transitions, 1259 flow [2024-06-03 20:40:35,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:35,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:35,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:35,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:40:35,252 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:35,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2041852043, now seen corresponding path program 3 times [2024-06-03 20:40:35,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:35,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699344526] [2024-06-03 20:40:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:35,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:35,468 INFO 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 20:40:35,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:35,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699344526] [2024-06-03 20:40:35,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699344526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:35,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:35,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:35,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439066619] [2024-06-03 20:40:35,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:35,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:35,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:35,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:35,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 145 transitions, 1259 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:35,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:35,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:35,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:35,768 INFO L124 PetriNetUnfolderBase]: 1098/1828 cut-off events. [2024-06-03 20:40:35,768 INFO L125 PetriNetUnfolderBase]: For 31751/31751 co-relation queries the response was YES. [2024-06-03 20:40:35,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10314 conditions, 1828 events. 1098/1828 cut-off events. For 31751/31751 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9575 event pairs, 305 based on Foata normal form. 4/1826 useless extension candidates. Maximal degree in co-relation 10257. Up to 1566 conditions per place. [2024-06-03 20:40:35,780 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 136 selfloop transitions, 28 changer transitions 0/171 dead transitions. [2024-06-03 20:40:35,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 171 transitions, 1669 flow [2024-06-03 20:40:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:40:35,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-03 20:40:35,783 INFO L175 Difference]: Start difference. First operand has 125 places, 145 transitions, 1259 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:40:35,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 171 transitions, 1669 flow [2024-06-03 20:40:35,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 171 transitions, 1604 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:35,812 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1283 flow [2024-06-03 20:40:35,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1283, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-03 20:40:35,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-03 20:40:35,813 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1283 flow [2024-06-03 20:40:35,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:35,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:35,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:35,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:40:35,814 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:35,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:35,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1597782161, now seen corresponding path program 4 times [2024-06-03 20:40:35,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:35,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111444742] [2024-06-03 20:40:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:35,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:36,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:36,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111444742] [2024-06-03 20:40:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111444742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:36,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690725221] [2024-06-03 20:40:36,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:36,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:36,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:36,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:36,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1283 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:36,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:36,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:36,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:36,317 INFO L124 PetriNetUnfolderBase]: 1090/1815 cut-off events. [2024-06-03 20:40:36,317 INFO L125 PetriNetUnfolderBase]: For 33979/33979 co-relation queries the response was YES. [2024-06-03 20:40:36,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10361 conditions, 1815 events. 1090/1815 cut-off events. For 33979/33979 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9504 event pairs, 274 based on Foata normal form. 4/1813 useless extension candidates. Maximal degree in co-relation 10303. Up to 1477 conditions per place. [2024-06-03 20:40:36,327 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 132 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-03 20:40:36,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 174 transitions, 1705 flow [2024-06-03 20:40:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:40:36,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-03 20:40:36,329 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1283 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:40:36,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 174 transitions, 1705 flow [2024-06-03 20:40:36,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 174 transitions, 1634 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:36,359 INFO L231 Difference]: Finished difference. Result has 129 places, 149 transitions, 1319 flow [2024-06-03 20:40:36,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1319, PETRI_PLACES=129, PETRI_TRANSITIONS=149} [2024-06-03 20:40:36,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-03 20:40:36,359 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 149 transitions, 1319 flow [2024-06-03 20:40:36,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:36,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:36,360 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 20:40:36,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:40:36,360 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:36,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -794940339, now seen corresponding path program 1 times [2024-06-03 20:40:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:36,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161176362] [2024-06-03 20:40:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:36,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:36,613 INFO 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 20:40:36,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:36,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161176362] [2024-06-03 20:40:36,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161176362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:36,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:36,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:36,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142852919] [2024-06-03 20:40:36,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:36,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:36,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:36,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:36,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:36,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:36,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 149 transitions, 1319 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:40:36,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:36,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:36,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:36,982 INFO L124 PetriNetUnfolderBase]: 1206/2012 cut-off events. [2024-06-03 20:40:36,982 INFO L125 PetriNetUnfolderBase]: For 48934/48974 co-relation queries the response was YES. [2024-06-03 20:40:36,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12048 conditions, 2012 events. 1206/2012 cut-off events. For 48934/48974 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10827 event pairs, 190 based on Foata normal form. 20/1979 useless extension candidates. Maximal degree in co-relation 11989. Up to 1456 conditions per place. [2024-06-03 20:40:36,995 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-03 20:40:36,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 192 transitions, 1943 flow [2024-06-03 20:40:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-03 20:40:36,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-03 20:40:36,997 INFO L175 Difference]: Start difference. First operand has 129 places, 149 transitions, 1319 flow. Second operand 7 states and 190 transitions. [2024-06-03 20:40:36,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 192 transitions, 1943 flow [2024-06-03 20:40:37,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 1854 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:37,038 INFO L231 Difference]: Finished difference. Result has 132 places, 156 transitions, 1433 flow [2024-06-03 20:40:37,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1433, PETRI_PLACES=132, PETRI_TRANSITIONS=156} [2024-06-03 20:40:37,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-03 20:40:37,039 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 156 transitions, 1433 flow [2024-06-03 20:40:37,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:40:37,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:37,040 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 20:40:37,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:40:37,040 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:37,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1794184545, now seen corresponding path program 2 times [2024-06-03 20:40:37,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:37,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804813054] [2024-06-03 20:40:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:37,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:37,283 INFO 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 20:40:37,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:37,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804813054] [2024-06-03 20:40:37,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804813054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:37,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:37,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:37,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961655628] [2024-06-03 20:40:37,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:37,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:37,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:37,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:37,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 156 transitions, 1433 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:40:37,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:37,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:37,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:37,631 INFO L124 PetriNetUnfolderBase]: 1171/1959 cut-off events. [2024-06-03 20:40:37,631 INFO L125 PetriNetUnfolderBase]: For 48841/48880 co-relation queries the response was YES. [2024-06-03 20:40:37,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11917 conditions, 1959 events. 1171/1959 cut-off events. For 48841/48880 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10599 event pairs, 267 based on Foata normal form. 18/1923 useless extension candidates. Maximal degree in co-relation 11856. Up to 1588 conditions per place. [2024-06-03 20:40:37,644 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 115 selfloop transitions, 36 changer transitions 0/183 dead transitions. [2024-06-03 20:40:37,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 183 transitions, 1834 flow [2024-06-03 20:40:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-03 20:40:37,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-03 20:40:37,645 INFO L175 Difference]: Start difference. First operand has 132 places, 156 transitions, 1433 flow. Second operand 6 states and 161 transitions. [2024-06-03 20:40:37,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 183 transitions, 1834 flow [2024-06-03 20:40:37,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 1782 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:37,688 INFO L231 Difference]: Finished difference. Result has 135 places, 157 transitions, 1483 flow [2024-06-03 20:40:37,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1483, PETRI_PLACES=135, PETRI_TRANSITIONS=157} [2024-06-03 20:40:37,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-03 20:40:37,689 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 157 transitions, 1483 flow [2024-06-03 20:40:37,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:40:37,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:37,689 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 20:40:37,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:40:37,689 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:37,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:37,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2075114849, now seen corresponding path program 3 times [2024-06-03 20:40:37,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:37,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009656505] [2024-06-03 20:40:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:37,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:37,910 INFO 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 20:40:37,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:37,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009656505] [2024-06-03 20:40:37,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009656505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:37,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:37,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:37,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533367218] [2024-06-03 20:40:37,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:37,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:37,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:37,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:37,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:37,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:37,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 157 transitions, 1483 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:40:37,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:37,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:37,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:38,290 INFO L124 PetriNetUnfolderBase]: 1218/2034 cut-off events. [2024-06-03 20:40:38,291 INFO L125 PetriNetUnfolderBase]: For 52579/52612 co-relation queries the response was YES. [2024-06-03 20:40:38,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12523 conditions, 2034 events. 1218/2034 cut-off events. For 52579/52612 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11033 event pairs, 273 based on Foata normal form. 14/1988 useless extension candidates. Maximal degree in co-relation 12460. Up to 1584 conditions per place. [2024-06-03 20:40:38,305 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 63 changer transitions 0/203 dead transitions. [2024-06-03 20:40:38,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 203 transitions, 2085 flow [2024-06-03 20:40:38,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:40:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:40:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-03 20:40:38,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-03 20:40:38,306 INFO L175 Difference]: Start difference. First operand has 135 places, 157 transitions, 1483 flow. Second operand 10 states and 254 transitions. [2024-06-03 20:40:38,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 203 transitions, 2085 flow [2024-06-03 20:40:38,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 203 transitions, 2010 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:38,347 INFO L231 Difference]: Finished difference. Result has 141 places, 159 transitions, 1577 flow [2024-06-03 20:40:38,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1577, PETRI_PLACES=141, PETRI_TRANSITIONS=159} [2024-06-03 20:40:38,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-03 20:40:38,347 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 159 transitions, 1577 flow [2024-06-03 20:40:38,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:40:38,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:38,348 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 20:40:38,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:40:38,348 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:38,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:38,348 INFO L85 PathProgramCache]: Analyzing trace with hash -44186931, now seen corresponding path program 4 times [2024-06-03 20:40:38,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:38,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603986056] [2024-06-03 20:40:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:38,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:38,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:38,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603986056] [2024-06-03 20:40:38,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603986056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:38,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:38,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:38,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704871228] [2024-06-03 20:40:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:38,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:38,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 159 transitions, 1577 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:40:38,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:38,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:38,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:38,954 INFO L124 PetriNetUnfolderBase]: 1244/2075 cut-off events. [2024-06-03 20:40:38,955 INFO L125 PetriNetUnfolderBase]: For 54946/54979 co-relation queries the response was YES. [2024-06-03 20:40:38,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12926 conditions, 2075 events. 1244/2075 cut-off events. For 54946/54979 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11329 event pairs, 276 based on Foata normal form. 14/2030 useless extension candidates. Maximal degree in co-relation 12862. Up to 1617 conditions per place. [2024-06-03 20:40:38,970 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 59 changer transitions 0/201 dead transitions. [2024-06-03 20:40:38,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 201 transitions, 2173 flow [2024-06-03 20:40:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-03 20:40:38,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-06-03 20:40:38,971 INFO L175 Difference]: Start difference. First operand has 141 places, 159 transitions, 1577 flow. Second operand 9 states and 229 transitions. [2024-06-03 20:40:38,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 201 transitions, 2173 flow [2024-06-03 20:40:39,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 201 transitions, 2038 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:40:39,025 INFO L231 Difference]: Finished difference. Result has 142 places, 161 transitions, 1607 flow [2024-06-03 20:40:39,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1607, PETRI_PLACES=142, PETRI_TRANSITIONS=161} [2024-06-03 20:40:39,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-03 20:40:39,026 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 161 transitions, 1607 flow [2024-06-03 20:40:39,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 20:40:39,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:39,027 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 20:40:39,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:40:39,027 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:39,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1233437084, now seen corresponding path program 1 times [2024-06-03 20:40:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:39,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519286454] [2024-06-03 20:40:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:39,259 INFO 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 20:40:39,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:39,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519286454] [2024-06-03 20:40:39,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519286454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:39,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:39,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660029942] [2024-06-03 20:40:39,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:39,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:39,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:39,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:39,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 161 transitions, 1607 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:39,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:39,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:39,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:39,552 INFO L124 PetriNetUnfolderBase]: 1311/2184 cut-off events. [2024-06-03 20:40:39,553 INFO L125 PetriNetUnfolderBase]: For 49019/49019 co-relation queries the response was YES. [2024-06-03 20:40:39,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13343 conditions, 2184 events. 1311/2184 cut-off events. For 49019/49019 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11807 event pairs, 305 based on Foata normal form. 1/2182 useless extension candidates. Maximal degree in co-relation 13278. Up to 1964 conditions per place. [2024-06-03 20:40:39,570 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 157 selfloop transitions, 20 changer transitions 0/184 dead transitions. [2024-06-03 20:40:39,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 184 transitions, 2151 flow [2024-06-03 20:40:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 20:40:39,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:40:39,572 INFO L175 Difference]: Start difference. First operand has 142 places, 161 transitions, 1607 flow. Second operand 6 states and 142 transitions. [2024-06-03 20:40:39,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 184 transitions, 2151 flow [2024-06-03 20:40:39,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 184 transitions, 2020 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:40:39,648 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1620 flow [2024-06-03 20:40:39,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1620, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-03 20:40:39,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-03 20:40:39,649 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1620 flow [2024-06-03 20:40:39,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:39,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:39,649 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 20:40:39,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:40:39,649 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:39,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432434, now seen corresponding path program 2 times [2024-06-03 20:40:39,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:39,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396854666] [2024-06-03 20:40:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:39,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:39,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:39,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396854666] [2024-06-03 20:40:39,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396854666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:39,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:39,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:39,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051775123] [2024-06-03 20:40:39,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:39,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:39,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:39,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:39,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1620 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:39,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:39,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:39,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:40,185 INFO L124 PetriNetUnfolderBase]: 1321/2200 cut-off events. [2024-06-03 20:40:40,185 INFO L125 PetriNetUnfolderBase]: For 51413/51413 co-relation queries the response was YES. [2024-06-03 20:40:40,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13382 conditions, 2200 events. 1321/2200 cut-off events. For 51413/51413 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11913 event pairs, 305 based on Foata normal form. 1/2198 useless extension candidates. Maximal degree in co-relation 13316. Up to 1990 conditions per place. [2024-06-03 20:40:40,201 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 161 selfloop transitions, 18 changer transitions 0/186 dead transitions. [2024-06-03 20:40:40,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 186 transitions, 2094 flow [2024-06-03 20:40:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 20:40:40,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-06-03 20:40:40,203 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1620 flow. Second operand 6 states and 137 transitions. [2024-06-03 20:40:40,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 186 transitions, 2094 flow [2024-06-03 20:40:40,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 2018 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:40,273 INFO L231 Difference]: Finished difference. Result has 145 places, 173 transitions, 1676 flow [2024-06-03 20:40:40,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1676, PETRI_PLACES=145, PETRI_TRANSITIONS=173} [2024-06-03 20:40:40,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-03 20:40:40,274 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 173 transitions, 1676 flow [2024-06-03 20:40:40,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:40,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:40,274 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 20:40:40,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:40:40,274 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:40,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:40,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432248, now seen corresponding path program 1 times [2024-06-03 20:40:40,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:40,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952701318] [2024-06-03 20:40:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:40,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:40,481 INFO 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 20:40:40,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:40,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952701318] [2024-06-03 20:40:40,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952701318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:40,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:40,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22011717] [2024-06-03 20:40:40,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:40,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:40,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:40,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:40,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:40,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:40,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 173 transitions, 1676 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:40,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:40,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:40,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:40,779 INFO L124 PetriNetUnfolderBase]: 1346/2234 cut-off events. [2024-06-03 20:40:40,780 INFO L125 PetriNetUnfolderBase]: For 54784/54784 co-relation queries the response was YES. [2024-06-03 20:40:40,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13660 conditions, 2234 events. 1346/2234 cut-off events. For 54784/54784 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12093 event pairs, 314 based on Foata normal form. 2/2230 useless extension candidates. Maximal degree in co-relation 13592. Up to 1935 conditions per place. [2024-06-03 20:40:40,794 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 149 selfloop transitions, 42 changer transitions 0/198 dead transitions. [2024-06-03 20:40:40,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 198 transitions, 2248 flow [2024-06-03 20:40:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:40:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:40:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:40:40,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-03 20:40:40,796 INFO L175 Difference]: Start difference. First operand has 145 places, 173 transitions, 1676 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:40:40,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 198 transitions, 2248 flow [2024-06-03 20:40:40,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 198 transitions, 2184 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:40,860 INFO L231 Difference]: Finished difference. Result has 149 places, 184 transitions, 1820 flow [2024-06-03 20:40:40,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1820, PETRI_PLACES=149, PETRI_TRANSITIONS=184} [2024-06-03 20:40:40,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-03 20:40:40,861 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 184 transitions, 1820 flow [2024-06-03 20:40:40,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:40,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:40,861 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 20:40:40,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:40:40,861 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:40,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:40,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1739189820, now seen corresponding path program 2 times [2024-06-03 20:40:40,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:40,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46640492] [2024-06-03 20:40:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:40,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:41,068 INFO 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 20:40:41,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:41,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46640492] [2024-06-03 20:40:41,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46640492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:41,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:41,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:41,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111281195] [2024-06-03 20:40:41,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:41,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:41,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:41,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:41,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:41,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:41,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 184 transitions, 1820 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:41,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:41,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:41,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:41,343 INFO L124 PetriNetUnfolderBase]: 1356/2253 cut-off events. [2024-06-03 20:40:41,343 INFO L125 PetriNetUnfolderBase]: For 58321/58324 co-relation queries the response was YES. [2024-06-03 20:40:41,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13957 conditions, 2253 events. 1356/2253 cut-off events. For 58321/58324 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12276 event pairs, 333 based on Foata normal form. 4/2249 useless extension candidates. Maximal degree in co-relation 13887. Up to 1945 conditions per place. [2024-06-03 20:40:41,360 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 46 changer transitions 0/198 dead transitions. [2024-06-03 20:40:41,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 198 transitions, 2333 flow [2024-06-03 20:40:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-03 20:40:41,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-03 20:40:41,362 INFO L175 Difference]: Start difference. First operand has 149 places, 184 transitions, 1820 flow. Second operand 5 states and 122 transitions. [2024-06-03 20:40:41,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 198 transitions, 2333 flow [2024-06-03 20:40:41,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 198 transitions, 2273 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:41,419 INFO L231 Difference]: Finished difference. Result has 152 places, 188 transitions, 1904 flow [2024-06-03 20:40:41,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1904, PETRI_PLACES=152, PETRI_TRANSITIONS=188} [2024-06-03 20:40:41,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-03 20:40:41,420 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 188 transitions, 1904 flow [2024-06-03 20:40:41,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:41,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:41,421 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 20:40:41,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:40:41,421 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:41,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash -535840404, now seen corresponding path program 3 times [2024-06-03 20:40:41,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:41,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730940332] [2024-06-03 20:40:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:41,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:41,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:41,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730940332] [2024-06-03 20:40:41,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730940332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:41,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:41,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:41,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024233831] [2024-06-03 20:40:41,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:41,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:41,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:41,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:41,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:41,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 188 transitions, 1904 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:41,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:41,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:41,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:41,996 INFO L124 PetriNetUnfolderBase]: 1353/2253 cut-off events. [2024-06-03 20:40:41,996 INFO L125 PetriNetUnfolderBase]: For 59906/59906 co-relation queries the response was YES. [2024-06-03 20:40:42,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14017 conditions, 2253 events. 1353/2253 cut-off events. For 59906/59906 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12249 event pairs, 303 based on Foata normal form. 1/2251 useless extension candidates. Maximal degree in co-relation 13946. Up to 2023 conditions per place. [2024-06-03 20:40:42,013 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 173 selfloop transitions, 23 changer transitions 0/203 dead transitions. [2024-06-03 20:40:42,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 203 transitions, 2334 flow [2024-06-03 20:40:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-03 20:40:42,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-03 20:40:42,014 INFO L175 Difference]: Start difference. First operand has 152 places, 188 transitions, 1904 flow. Second operand 5 states and 123 transitions. [2024-06-03 20:40:42,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 203 transitions, 2334 flow [2024-06-03 20:40:42,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 203 transitions, 2206 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:42,084 INFO L231 Difference]: Finished difference. Result has 154 places, 188 transitions, 1836 flow [2024-06-03 20:40:42,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1836, PETRI_PLACES=154, PETRI_TRANSITIONS=188} [2024-06-03 20:40:42,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-03 20:40:42,084 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 188 transitions, 1836 flow [2024-06-03 20:40:42,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:42,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:42,085 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 20:40:42,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:40:42,085 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:42,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:42,085 INFO L85 PathProgramCache]: Analyzing trace with hash -535840218, now seen corresponding path program 3 times [2024-06-03 20:40:42,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:42,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255574719] [2024-06-03 20:40:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:42,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:42,290 INFO 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 20:40:42,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:42,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255574719] [2024-06-03 20:40:42,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255574719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:42,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:42,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:42,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759055892] [2024-06-03 20:40:42,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:42,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:42,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:42,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:42,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:42,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:42,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 188 transitions, 1836 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:42,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:42,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:42,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:42,591 INFO L124 PetriNetUnfolderBase]: 1333/2214 cut-off events. [2024-06-03 20:40:42,591 INFO L125 PetriNetUnfolderBase]: For 61839/61839 co-relation queries the response was YES. [2024-06-03 20:40:42,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13796 conditions, 2214 events. 1333/2214 cut-off events. For 61839/61839 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12013 event pairs, 312 based on Foata normal form. 2/2210 useless extension candidates. Maximal degree in co-relation 13725. Up to 1912 conditions per place. [2024-06-03 20:40:42,606 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 147 selfloop transitions, 46 changer transitions 0/200 dead transitions. [2024-06-03 20:40:42,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 200 transitions, 2252 flow [2024-06-03 20:40:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 20:40:42,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-03 20:40:42,608 INFO L175 Difference]: Start difference. First operand has 154 places, 188 transitions, 1836 flow. Second operand 5 states and 124 transitions. [2024-06-03 20:40:42,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 200 transitions, 2252 flow [2024-06-03 20:40:42,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 200 transitions, 2196 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:42,667 INFO L231 Difference]: Finished difference. Result has 155 places, 188 transitions, 1888 flow [2024-06-03 20:40:42,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1888, PETRI_PLACES=155, PETRI_TRANSITIONS=188} [2024-06-03 20:40:42,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-03 20:40:42,668 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 188 transitions, 1888 flow [2024-06-03 20:40:42,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:42,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:42,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:42,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:40:42,669 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:42,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash -535594140, now seen corresponding path program 1 times [2024-06-03 20:40:42,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:42,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25045194] [2024-06-03 20:40:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:42,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:42,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:42,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25045194] [2024-06-03 20:40:42,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25045194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:42,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:42,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:40:42,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600548627] [2024-06-03 20:40:42,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:42,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:40:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:42,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:40:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:40:42,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:40:42,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 188 transitions, 1888 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 20:40:42,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:42,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:40:42,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:43,211 INFO L124 PetriNetUnfolderBase]: 1298/2178 cut-off events. [2024-06-03 20:40:43,212 INFO L125 PetriNetUnfolderBase]: For 65944/65958 co-relation queries the response was YES. [2024-06-03 20:40:43,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13615 conditions, 2178 events. 1298/2178 cut-off events. For 65944/65958 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12030 event pairs, 315 based on Foata normal form. 24/2187 useless extension candidates. Maximal degree in co-relation 13543. Up to 1793 conditions per place. [2024-06-03 20:40:43,229 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 151 selfloop transitions, 22 changer transitions 0/203 dead transitions. [2024-06-03 20:40:43,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 203 transitions, 2308 flow [2024-06-03 20:40:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:40:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:40:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-03 20:40:43,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:40:43,231 INFO L175 Difference]: Start difference. First operand has 155 places, 188 transitions, 1888 flow. Second operand 5 states and 125 transitions. [2024-06-03 20:40:43,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 203 transitions, 2308 flow [2024-06-03 20:40:43,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 203 transitions, 2196 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:40:43,313 INFO L231 Difference]: Finished difference. Result has 156 places, 190 transitions, 1857 flow [2024-06-03 20:40:43,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1857, PETRI_PLACES=156, PETRI_TRANSITIONS=190} [2024-06-03 20:40:43,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-03 20:40:43,314 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 190 transitions, 1857 flow [2024-06-03 20:40:43,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 20:40:43,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:43,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:43,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:40:43,314 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:43,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash 280889040, now seen corresponding path program 1 times [2024-06-03 20:40:43,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:43,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665420322] [2024-06-03 20:40:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:43,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:43,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:43,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665420322] [2024-06-03 20:40:43,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665420322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:43,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:43,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:43,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159972523] [2024-06-03 20:40:43,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:43,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:43,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:43,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:43,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 190 transitions, 1857 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:43,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:43,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:43,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:43,991 INFO L124 PetriNetUnfolderBase]: 1491/2485 cut-off events. [2024-06-03 20:40:43,992 INFO L125 PetriNetUnfolderBase]: For 73594/73594 co-relation queries the response was YES. [2024-06-03 20:40:44,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15462 conditions, 2485 events. 1491/2485 cut-off events. For 73594/73594 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13831 event pairs, 242 based on Foata normal form. 12/2494 useless extension candidates. Maximal degree in co-relation 15389. Up to 1924 conditions per place. [2024-06-03 20:40:44,012 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 26 changer transitions 0/236 dead transitions. [2024-06-03 20:40:44,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 236 transitions, 2643 flow [2024-06-03 20:40:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:40:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:40:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:40:44,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 20:40:44,014 INFO L175 Difference]: Start difference. First operand has 156 places, 190 transitions, 1857 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:40:44,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 236 transitions, 2643 flow [2024-06-03 20:40:44,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 236 transitions, 2584 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:44,116 INFO L231 Difference]: Finished difference. Result has 163 places, 195 transitions, 1943 flow [2024-06-03 20:40:44,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1943, PETRI_PLACES=163, PETRI_TRANSITIONS=195} [2024-06-03 20:40:44,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-03 20:40:44,117 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 195 transitions, 1943 flow [2024-06-03 20:40:44,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:44,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:44,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:44,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:40:44,117 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:44,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1434594660, now seen corresponding path program 2 times [2024-06-03 20:40:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:44,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656783730] [2024-06-03 20:40:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:44,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:44,345 INFO 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 20:40:44,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:44,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656783730] [2024-06-03 20:40:44,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656783730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:44,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:44,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:44,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199232785] [2024-06-03 20:40:44,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:44,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:44,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:44,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:44,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:44,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 195 transitions, 1943 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:44,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:44,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:44,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:44,781 INFO L124 PetriNetUnfolderBase]: 1532/2554 cut-off events. [2024-06-03 20:40:44,781 INFO L125 PetriNetUnfolderBase]: For 78234/78234 co-relation queries the response was YES. [2024-06-03 20:40:44,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16025 conditions, 2554 events. 1532/2554 cut-off events. For 78234/78234 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14322 event pairs, 323 based on Foata normal form. 12/2563 useless extension candidates. Maximal degree in co-relation 15949. Up to 2058 conditions per place. [2024-06-03 20:40:44,838 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 202 selfloop transitions, 24 changer transitions 0/233 dead transitions. [2024-06-03 20:40:44,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 233 transitions, 2684 flow [2024-06-03 20:40:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:40:44,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 20:40:44,839 INFO L175 Difference]: Start difference. First operand has 163 places, 195 transitions, 1943 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:40:44,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 233 transitions, 2684 flow [2024-06-03 20:40:44,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 233 transitions, 2632 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:44,965 INFO L231 Difference]: Finished difference. Result has 168 places, 198 transitions, 2008 flow [2024-06-03 20:40:44,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2008, PETRI_PLACES=168, PETRI_TRANSITIONS=198} [2024-06-03 20:40:44,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-03 20:40:44,966 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 198 transitions, 2008 flow [2024-06-03 20:40:44,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:44,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:44,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:44,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:40:44,967 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:44,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:44,967 INFO L85 PathProgramCache]: Analyzing trace with hash -214705298, now seen corresponding path program 3 times [2024-06-03 20:40:44,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:44,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363500188] [2024-06-03 20:40:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:44,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:45,198 INFO 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 20:40:45,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:45,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363500188] [2024-06-03 20:40:45,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363500188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:45,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:45,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:45,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897658534] [2024-06-03 20:40:45,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:45,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:45,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:45,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:45,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:45,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 198 transitions, 2008 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:45,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:45,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:45,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:45,632 INFO L124 PetriNetUnfolderBase]: 1504/2510 cut-off events. [2024-06-03 20:40:45,633 INFO L125 PetriNetUnfolderBase]: For 77474/77474 co-relation queries the response was YES. [2024-06-03 20:40:45,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15511 conditions, 2510 events. 1504/2510 cut-off events. For 77474/77474 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13974 event pairs, 324 based on Foata normal form. 16/2523 useless extension candidates. Maximal degree in co-relation 15432. Up to 2137 conditions per place. [2024-06-03 20:40:45,653 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 24 changer transitions 0/229 dead transitions. [2024-06-03 20:40:45,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 229 transitions, 2568 flow [2024-06-03 20:40:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:40:45,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-03 20:40:45,654 INFO L175 Difference]: Start difference. First operand has 168 places, 198 transitions, 2008 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:40:45,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 229 transitions, 2568 flow [2024-06-03 20:40:45,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 229 transitions, 2500 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 20:40:45,774 INFO L231 Difference]: Finished difference. Result has 172 places, 199 transitions, 2022 flow [2024-06-03 20:40:45,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2022, PETRI_PLACES=172, PETRI_TRANSITIONS=199} [2024-06-03 20:40:45,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-03 20:40:45,775 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 199 transitions, 2022 flow [2024-06-03 20:40:45,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:45,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:45,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:45,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:40:45,775 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:45,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash -935646324, now seen corresponding path program 4 times [2024-06-03 20:40:45,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:45,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067920458] [2024-06-03 20:40:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:45,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:46,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:46,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067920458] [2024-06-03 20:40:46,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067920458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:46,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:46,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:46,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151158064] [2024-06-03 20:40:46,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:46,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:46,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:46,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:46,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 199 transitions, 2022 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:46,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:46,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:46,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:46,429 INFO L124 PetriNetUnfolderBase]: 1562/2608 cut-off events. [2024-06-03 20:40:46,429 INFO L125 PetriNetUnfolderBase]: For 81182/81185 co-relation queries the response was YES. [2024-06-03 20:40:46,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15988 conditions, 2608 events. 1562/2608 cut-off events. For 81182/81185 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14774 event pairs, 346 based on Foata normal form. 16/2619 useless extension candidates. Maximal degree in co-relation 15907. Up to 2145 conditions per place. [2024-06-03 20:40:46,450 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 53 changer transitions 0/245 dead transitions. [2024-06-03 20:40:46,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 245 transitions, 2648 flow [2024-06-03 20:40:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:40:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:40:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-03 20:40:46,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-03 20:40:46,451 INFO L175 Difference]: Start difference. First operand has 172 places, 199 transitions, 2022 flow. Second operand 10 states and 243 transitions. [2024-06-03 20:40:46,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 245 transitions, 2648 flow [2024-06-03 20:40:46,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 245 transitions, 2600 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:46,574 INFO L231 Difference]: Finished difference. Result has 177 places, 200 transitions, 2107 flow [2024-06-03 20:40:46,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2107, PETRI_PLACES=177, PETRI_TRANSITIONS=200} [2024-06-03 20:40:46,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-03 20:40:46,575 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 200 transitions, 2107 flow [2024-06-03 20:40:46,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:46,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:46,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:46,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:40:46,575 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:46,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:46,576 INFO L85 PathProgramCache]: Analyzing trace with hash 539326616, now seen corresponding path program 5 times [2024-06-03 20:40:46,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:46,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472409900] [2024-06-03 20:40:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:46,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:46,788 INFO 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 20:40:46,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:46,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472409900] [2024-06-03 20:40:46,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472409900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:46,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:46,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:46,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442244082] [2024-06-03 20:40:46,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:46,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:46,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:46,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:46,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:46,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:46,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 200 transitions, 2107 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:46,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:46,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:46,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:47,340 INFO L124 PetriNetUnfolderBase]: 1620/2726 cut-off events. [2024-06-03 20:40:47,340 INFO L125 PetriNetUnfolderBase]: For 86279/86282 co-relation queries the response was YES. [2024-06-03 20:40:47,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16724 conditions, 2726 events. 1620/2726 cut-off events. For 86279/86282 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15722 event pairs, 366 based on Foata normal form. 16/2737 useless extension candidates. Maximal degree in co-relation 16642. Up to 2243 conditions per place. [2024-06-03 20:40:47,360 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 55 changer transitions 0/250 dead transitions. [2024-06-03 20:40:47,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 250 transitions, 2755 flow [2024-06-03 20:40:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:40:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:40:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-03 20:40:47,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-03 20:40:47,361 INFO L175 Difference]: Start difference. First operand has 177 places, 200 transitions, 2107 flow. Second operand 11 states and 261 transitions. [2024-06-03 20:40:47,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 250 transitions, 2755 flow [2024-06-03 20:40:47,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 250 transitions, 2640 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:40:47,497 INFO L231 Difference]: Finished difference. Result has 180 places, 201 transitions, 2131 flow [2024-06-03 20:40:47,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2131, PETRI_PLACES=180, PETRI_TRANSITIONS=201} [2024-06-03 20:40:47,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-03 20:40:47,498 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 201 transitions, 2131 flow [2024-06-03 20:40:47,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:47,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:47,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:47,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:40:47,499 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:47,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:47,499 INFO L85 PathProgramCache]: Analyzing trace with hash -95948336, now seen corresponding path program 6 times [2024-06-03 20:40:47,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:47,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361833337] [2024-06-03 20:40:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:47,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:47,773 INFO 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 20:40:47,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:47,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361833337] [2024-06-03 20:40:47,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361833337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:47,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:47,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:47,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673701456] [2024-06-03 20:40:47,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:47,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:47,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:47,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:47,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:47,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:47,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 201 transitions, 2131 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:47,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:47,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:47,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:48,242 INFO L124 PetriNetUnfolderBase]: 1661/2797 cut-off events. [2024-06-03 20:40:48,242 INFO L125 PetriNetUnfolderBase]: For 88324/88327 co-relation queries the response was YES. [2024-06-03 20:40:48,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17121 conditions, 2797 events. 1661/2797 cut-off events. For 88324/88327 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16283 event pairs, 359 based on Foata normal form. 12/2804 useless extension candidates. Maximal degree in co-relation 17038. Up to 2135 conditions per place. [2024-06-03 20:40:48,265 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 56 changer transitions 0/252 dead transitions. [2024-06-03 20:40:48,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 252 transitions, 2823 flow [2024-06-03 20:40:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:40:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:40:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-03 20:40:48,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:40:48,267 INFO L175 Difference]: Start difference. First operand has 180 places, 201 transitions, 2131 flow. Second operand 10 states and 245 transitions. [2024-06-03 20:40:48,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 252 transitions, 2823 flow [2024-06-03 20:40:48,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 252 transitions, 2702 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 20:40:48,428 INFO L231 Difference]: Finished difference. Result has 182 places, 204 transitions, 2195 flow [2024-06-03 20:40:48,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2195, PETRI_PLACES=182, PETRI_TRANSITIONS=204} [2024-06-03 20:40:48,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-03 20:40:48,429 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 204 transitions, 2195 flow [2024-06-03 20:40:48,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:48,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:48,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:48,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:40:48,432 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:48,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:48,432 INFO L85 PathProgramCache]: Analyzing trace with hash 111125836, now seen corresponding path program 1 times [2024-06-03 20:40:48,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:48,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023019920] [2024-06-03 20:40:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:48,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:48,663 INFO 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 20:40:48,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:48,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023019920] [2024-06-03 20:40:48,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023019920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:48,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:48,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:48,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630753420] [2024-06-03 20:40:48,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:48,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:48,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:48,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:48,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:48,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 204 transitions, 2195 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:48,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:48,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:48,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:49,165 INFO L124 PetriNetUnfolderBase]: 1702/2868 cut-off events. [2024-06-03 20:40:49,165 INFO L125 PetriNetUnfolderBase]: For 93666/93669 co-relation queries the response was YES. [2024-06-03 20:40:49,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17590 conditions, 2868 events. 1702/2868 cut-off events. For 93666/93669 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16885 event pairs, 367 based on Foata normal form. 12/2875 useless extension candidates. Maximal degree in co-relation 17505. Up to 2114 conditions per place. [2024-06-03 20:40:49,189 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 60 changer transitions 0/257 dead transitions. [2024-06-03 20:40:49,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 257 transitions, 2877 flow [2024-06-03 20:40:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:40:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:40:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-03 20:40:49,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692640692640693 [2024-06-03 20:40:49,190 INFO L175 Difference]: Start difference. First operand has 182 places, 204 transitions, 2195 flow. Second operand 11 states and 263 transitions. [2024-06-03 20:40:49,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 257 transitions, 2877 flow [2024-06-03 20:40:49,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 257 transitions, 2785 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:49,361 INFO L231 Difference]: Finished difference. Result has 187 places, 205 transitions, 2255 flow [2024-06-03 20:40:49,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2255, PETRI_PLACES=187, PETRI_TRANSITIONS=205} [2024-06-03 20:40:49,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-03 20:40:49,362 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 205 transitions, 2255 flow [2024-06-03 20:40:49,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:49,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:49,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:49,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:40:49,363 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:49,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:49,363 INFO L85 PathProgramCache]: Analyzing trace with hash -592122344, now seen corresponding path program 7 times [2024-06-03 20:40:49,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:49,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658327799] [2024-06-03 20:40:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:49,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:49,588 INFO 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 20:40:49,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658327799] [2024-06-03 20:40:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658327799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:49,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:49,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:49,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232810490] [2024-06-03 20:40:49,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:49,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:49,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:49,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:49,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:49,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:49,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 205 transitions, 2255 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:49,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:49,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:49,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:50,121 INFO L124 PetriNetUnfolderBase]: 1760/2971 cut-off events. [2024-06-03 20:40:50,122 INFO L125 PetriNetUnfolderBase]: For 101630/101630 co-relation queries the response was YES. [2024-06-03 20:40:50,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18341 conditions, 2971 events. 1760/2971 cut-off events. For 101630/101630 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17734 event pairs, 400 based on Foata normal form. 16/2981 useless extension candidates. Maximal degree in co-relation 18254. Up to 2483 conditions per place. [2024-06-03 20:40:50,147 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 54 changer transitions 0/256 dead transitions. [2024-06-03 20:40:50,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 256 transitions, 2923 flow [2024-06-03 20:40:50,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:40:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:40:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 279 transitions. [2024-06-03 20:40:50,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 20:40:50,149 INFO L175 Difference]: Start difference. First operand has 187 places, 205 transitions, 2255 flow. Second operand 12 states and 279 transitions. [2024-06-03 20:40:50,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 256 transitions, 2923 flow [2024-06-03 20:40:50,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 256 transitions, 2785 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 20:40:50,321 INFO L231 Difference]: Finished difference. Result has 190 places, 206 transitions, 2260 flow [2024-06-03 20:40:50,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2260, PETRI_PLACES=190, PETRI_TRANSITIONS=206} [2024-06-03 20:40:50,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-03 20:40:50,323 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 206 transitions, 2260 flow [2024-06-03 20:40:50,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:50,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:50,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:50,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:40:50,324 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:50,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1823964014, now seen corresponding path program 8 times [2024-06-03 20:40:50,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:50,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047572123] [2024-06-03 20:40:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:50,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:50,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:50,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047572123] [2024-06-03 20:40:50,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047572123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:50,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:50,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:50,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382392473] [2024-06-03 20:40:50,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:50,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:50,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:50,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:50,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:50,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:50,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 206 transitions, 2260 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:50,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:50,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:50,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:51,197 INFO L124 PetriNetUnfolderBase]: 1818/3069 cut-off events. [2024-06-03 20:40:51,200 INFO L125 PetriNetUnfolderBase]: For 107096/107096 co-relation queries the response was YES. [2024-06-03 20:40:51,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18830 conditions, 3069 events. 1818/3069 cut-off events. For 107096/107096 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18442 event pairs, 410 based on Foata normal form. 16/3079 useless extension candidates. Maximal degree in co-relation 18742. Up to 2581 conditions per place. [2024-06-03 20:40:51,225 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 53 changer transitions 0/249 dead transitions. [2024-06-03 20:40:51,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 249 transitions, 2896 flow [2024-06-03 20:40:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:40:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:40:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-03 20:40:51,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-03 20:40:51,235 INFO L175 Difference]: Start difference. First operand has 190 places, 206 transitions, 2260 flow. Second operand 10 states and 237 transitions. [2024-06-03 20:40:51,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 249 transitions, 2896 flow [2024-06-03 20:40:51,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 249 transitions, 2771 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-03 20:40:51,430 INFO L231 Difference]: Finished difference. Result has 190 places, 207 transitions, 2278 flow [2024-06-03 20:40:51,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2278, PETRI_PLACES=190, PETRI_TRANSITIONS=207} [2024-06-03 20:40:51,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-03 20:40:51,432 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 207 transitions, 2278 flow [2024-06-03 20:40:51,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:51,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:51,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:51,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:40:51,433 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:51,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1899437774, now seen corresponding path program 9 times [2024-06-03 20:40:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:51,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547813098] [2024-06-03 20:40:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:51,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:51,721 INFO 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 20:40:51,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:51,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547813098] [2024-06-03 20:40:51,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547813098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:51,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:51,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:51,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602965695] [2024-06-03 20:40:51,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:51,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:51,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:51,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:51,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:51,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:51,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 207 transitions, 2278 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:51,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:51,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:51,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:52,264 INFO L124 PetriNetUnfolderBase]: 1876/3177 cut-off events. [2024-06-03 20:40:52,265 INFO L125 PetriNetUnfolderBase]: For 112550/112550 co-relation queries the response was YES. [2024-06-03 20:40:52,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19366 conditions, 3177 events. 1876/3177 cut-off events. For 112550/112550 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19310 event pairs, 425 based on Foata normal form. 16/3187 useless extension candidates. Maximal degree in co-relation 19277. Up to 2679 conditions per place. [2024-06-03 20:40:52,292 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 57 changer transitions 0/254 dead transitions. [2024-06-03 20:40:52,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 254 transitions, 2936 flow [2024-06-03 20:40:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:40:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:40:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-03 20:40:52,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-03 20:40:52,293 INFO L175 Difference]: Start difference. First operand has 190 places, 207 transitions, 2278 flow. Second operand 11 states and 255 transitions. [2024-06-03 20:40:52,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 254 transitions, 2936 flow [2024-06-03 20:40:52,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 254 transitions, 2811 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 20:40:52,468 INFO L231 Difference]: Finished difference. Result has 193 places, 208 transitions, 2306 flow [2024-06-03 20:40:52,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2306, PETRI_PLACES=193, PETRI_TRANSITIONS=208} [2024-06-03 20:40:52,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-03 20:40:52,469 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 208 transitions, 2306 flow [2024-06-03 20:40:52,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:52,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:52,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:52,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:40:52,469 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:52,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:52,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1823816144, now seen corresponding path program 10 times [2024-06-03 20:40:52,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:52,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752493604] [2024-06-03 20:40:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:52,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:52,686 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 20:40:52,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:52,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752493604] [2024-06-03 20:40:52,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752493604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:52,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:52,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:52,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224073913] [2024-06-03 20:40:52,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:52,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:52,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:52,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:52,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:52,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 208 transitions, 2306 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:52,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:52,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:52,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:53,226 INFO L124 PetriNetUnfolderBase]: 1892/3209 cut-off events. [2024-06-03 20:40:53,227 INFO L125 PetriNetUnfolderBase]: For 110538/110538 co-relation queries the response was YES. [2024-06-03 20:40:53,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19347 conditions, 3209 events. 1892/3209 cut-off events. For 110538/110538 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19565 event pairs, 416 based on Foata normal form. 12/3215 useless extension candidates. Maximal degree in co-relation 19257. Up to 2440 conditions per place. [2024-06-03 20:40:53,253 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 57 changer transitions 0/256 dead transitions. [2024-06-03 20:40:53,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 256 transitions, 3018 flow [2024-06-03 20:40:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:40:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:40:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-03 20:40:53,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-06-03 20:40:53,254 INFO L175 Difference]: Start difference. First operand has 193 places, 208 transitions, 2306 flow. Second operand 10 states and 239 transitions. [2024-06-03 20:40:53,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 256 transitions, 3018 flow [2024-06-03 20:40:53,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 256 transitions, 2883 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 20:40:53,425 INFO L231 Difference]: Finished difference. Result has 195 places, 211 transitions, 2381 flow [2024-06-03 20:40:53,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2171, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2381, PETRI_PLACES=195, PETRI_TRANSITIONS=211} [2024-06-03 20:40:53,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-03 20:40:53,425 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 211 transitions, 2381 flow [2024-06-03 20:40:53,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:53,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:53,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:53,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:40:53,426 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:53,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2030890316, now seen corresponding path program 2 times [2024-06-03 20:40:53,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:53,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167091122] [2024-06-03 20:40:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:53,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:53,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:53,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167091122] [2024-06-03 20:40:53,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167091122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:53,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:53,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:53,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567769179] [2024-06-03 20:40:53,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:53,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:53,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 211 transitions, 2381 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:53,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:53,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:53,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:54,268 INFO L124 PetriNetUnfolderBase]: 1933/3290 cut-off events. [2024-06-03 20:40:54,269 INFO L125 PetriNetUnfolderBase]: For 116027/116027 co-relation queries the response was YES. [2024-06-03 20:40:54,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19814 conditions, 3290 events. 1933/3290 cut-off events. For 116027/116027 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20288 event pairs, 433 based on Foata normal form. 12/3296 useless extension candidates. Maximal degree in co-relation 19722. Up to 2603 conditions per place. [2024-06-03 20:40:54,296 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 58 changer transitions 0/265 dead transitions. [2024-06-03 20:40:54,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 265 transitions, 3091 flow [2024-06-03 20:40:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:40:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:40:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 281 transitions. [2024-06-03 20:40:54,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575396825396826 [2024-06-03 20:40:54,299 INFO L175 Difference]: Start difference. First operand has 195 places, 211 transitions, 2381 flow. Second operand 12 states and 281 transitions. [2024-06-03 20:40:54,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 265 transitions, 3091 flow [2024-06-03 20:40:54,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 265 transitions, 2981 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:54,591 INFO L231 Difference]: Finished difference. Result has 201 places, 212 transitions, 2429 flow [2024-06-03 20:40:54,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2429, PETRI_PLACES=201, PETRI_TRANSITIONS=212} [2024-06-03 20:40:54,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-03 20:40:54,592 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 212 transitions, 2429 flow [2024-06-03 20:40:54,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:54,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:54,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:54,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:40:54,593 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:54,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1936463428, now seen corresponding path program 3 times [2024-06-03 20:40:54,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:54,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974247496] [2024-06-03 20:40:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:54,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:54,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:54,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974247496] [2024-06-03 20:40:54,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974247496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:54,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:54,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:54,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172692286] [2024-06-03 20:40:54,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:54,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:54,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:54,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:54,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:54,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:54,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 212 transitions, 2429 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:54,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:54,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:54,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:55,378 INFO L124 PetriNetUnfolderBase]: 1974/3366 cut-off events. [2024-06-03 20:40:55,379 INFO L125 PetriNetUnfolderBase]: For 121382/121382 co-relation queries the response was YES. [2024-06-03 20:40:55,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20358 conditions, 3366 events. 1974/3366 cut-off events. For 121382/121382 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20895 event pairs, 448 based on Foata normal form. 12/3372 useless extension candidates. Maximal degree in co-relation 20264. Up to 2766 conditions per place. [2024-06-03 20:40:55,407 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 199 selfloop transitions, 60 changer transitions 0/266 dead transitions. [2024-06-03 20:40:55,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 266 transitions, 3143 flow [2024-06-03 20:40:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:40:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:40:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2024-06-03 20:40:55,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-03 20:40:55,414 INFO L175 Difference]: Start difference. First operand has 201 places, 212 transitions, 2429 flow. Second operand 12 states and 278 transitions. [2024-06-03 20:40:55,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 266 transitions, 3143 flow [2024-06-03 20:40:55,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 266 transitions, 2999 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-03 20:40:55,602 INFO L231 Difference]: Finished difference. Result has 203 places, 213 transitions, 2449 flow [2024-06-03 20:40:55,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2449, PETRI_PLACES=203, PETRI_TRANSITIONS=213} [2024-06-03 20:40:55,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-03 20:40:55,602 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 213 transitions, 2449 flow [2024-06-03 20:40:55,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:55,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:55,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:55,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:40:55,603 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:55,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash -18362134, now seen corresponding path program 4 times [2024-06-03 20:40:55,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:55,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438656528] [2024-06-03 20:40:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:55,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:55,855 INFO 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 20:40:55,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:55,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438656528] [2024-06-03 20:40:55,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438656528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:55,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:55,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:55,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663603938] [2024-06-03 20:40:55,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:55,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:55,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:55,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:55,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:55,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 213 transitions, 2449 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:55,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:55,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:55,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:56,406 INFO L124 PetriNetUnfolderBase]: 1954/3344 cut-off events. [2024-06-03 20:40:56,407 INFO L125 PetriNetUnfolderBase]: For 113421/113421 co-relation queries the response was YES. [2024-06-03 20:40:56,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19616 conditions, 3344 events. 1954/3344 cut-off events. For 113421/113421 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20744 event pairs, 393 based on Foata normal form. 12/3350 useless extension candidates. Maximal degree in co-relation 19521. Up to 1990 conditions per place. [2024-06-03 20:40:56,435 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 72 changer transitions 0/262 dead transitions. [2024-06-03 20:40:56,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 262 transitions, 3029 flow [2024-06-03 20:40:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:40:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:40:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-03 20:40:56,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562770562770563 [2024-06-03 20:40:56,437 INFO L175 Difference]: Start difference. First operand has 203 places, 213 transitions, 2449 flow. Second operand 11 states and 257 transitions. [2024-06-03 20:40:56,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 262 transitions, 3029 flow [2024-06-03 20:40:56,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 262 transitions, 2879 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-03 20:40:56,653 INFO L231 Difference]: Finished difference. Result has 203 places, 212 transitions, 2365 flow [2024-06-03 20:40:56,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2365, PETRI_PLACES=203, PETRI_TRANSITIONS=212} [2024-06-03 20:40:56,653 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-03 20:40:56,653 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 212 transitions, 2365 flow [2024-06-03 20:40:56,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:56,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:56,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:56,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:40:56,654 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:56,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1707000483, now seen corresponding path program 1 times [2024-06-03 20:40:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:56,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725585718] [2024-06-03 20:40:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:56,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:56,870 INFO 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 20:40:56,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:56,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725585718] [2024-06-03 20:40:56,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725585718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:56,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:56,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:56,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164498347] [2024-06-03 20:40:56,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:56,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:56,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:56,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:56,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:56,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:56,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 212 transitions, 2365 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:56,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:56,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:56,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:57,324 INFO L124 PetriNetUnfolderBase]: 1982/3382 cut-off events. [2024-06-03 20:40:57,324 INFO L125 PetriNetUnfolderBase]: For 109903/109903 co-relation queries the response was YES. [2024-06-03 20:40:57,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20038 conditions, 3382 events. 1982/3382 cut-off events. For 109903/109903 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21062 event pairs, 450 based on Foata normal form. 2/3378 useless extension candidates. Maximal degree in co-relation 19942. Up to 2902 conditions per place. [2024-06-03 20:40:57,353 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 64 changer transitions 0/244 dead transitions. [2024-06-03 20:40:57,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 244 transitions, 3271 flow [2024-06-03 20:40:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:40:57,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-03 20:40:57,355 INFO L175 Difference]: Start difference. First operand has 203 places, 212 transitions, 2365 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:40:57,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 244 transitions, 3271 flow [2024-06-03 20:40:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 244 transitions, 2999 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-03 20:40:57,670 INFO L231 Difference]: Finished difference. Result has 199 places, 223 transitions, 2406 flow [2024-06-03 20:40:57,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2406, PETRI_PLACES=199, PETRI_TRANSITIONS=223} [2024-06-03 20:40:57,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-03 20:40:57,671 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 223 transitions, 2406 flow [2024-06-03 20:40:57,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:57,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:57,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:57,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:40:57,672 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:57,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1710725133, now seen corresponding path program 2 times [2024-06-03 20:40:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:57,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304667835] [2024-06-03 20:40:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:57,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:57,887 INFO 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 20:40:57,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:57,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304667835] [2024-06-03 20:40:57,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304667835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:57,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:57,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:57,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679073798] [2024-06-03 20:40:57,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:57,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:57,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:57,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:57,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:57,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 223 transitions, 2406 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:57,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:57,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:57,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:58,378 INFO L124 PetriNetUnfolderBase]: 2024/3452 cut-off events. [2024-06-03 20:40:58,378 INFO L125 PetriNetUnfolderBase]: For 118225/118225 co-relation queries the response was YES. [2024-06-03 20:40:58,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20372 conditions, 3452 events. 2024/3452 cut-off events. For 118225/118225 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21583 event pairs, 452 based on Foata normal form. 2/3448 useless extension candidates. Maximal degree in co-relation 20277. Up to 3037 conditions per place. [2024-06-03 20:40:58,411 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 187 selfloop transitions, 59 changer transitions 0/253 dead transitions. [2024-06-03 20:40:58,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 253 transitions, 3330 flow [2024-06-03 20:40:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-03 20:40:58,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-03 20:40:58,413 INFO L175 Difference]: Start difference. First operand has 199 places, 223 transitions, 2406 flow. Second operand 9 states and 203 transitions. [2024-06-03 20:40:58,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 253 transitions, 3330 flow [2024-06-03 20:40:58,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 253 transitions, 3209 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-03 20:40:58,686 INFO L231 Difference]: Finished difference. Result has 207 places, 235 transitions, 2629 flow [2024-06-03 20:40:58,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2629, PETRI_PLACES=207, PETRI_TRANSITIONS=235} [2024-06-03 20:40:58,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-03 20:40:58,687 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 235 transitions, 2629 flow [2024-06-03 20:40:58,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:58,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:58,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:58,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:40:58,688 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:58,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:58,688 INFO L85 PathProgramCache]: Analyzing trace with hash 375462631, now seen corresponding path program 3 times [2024-06-03 20:40:58,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:58,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667375895] [2024-06-03 20:40:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:58,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:58,902 INFO 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 20:40:58,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667375895] [2024-06-03 20:40:58,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667375895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:58,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:58,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:58,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389243343] [2024-06-03 20:40:58,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:58,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:58,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:58,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:58,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 235 transitions, 2629 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:58,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:58,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:58,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:59,400 INFO L124 PetriNetUnfolderBase]: 2020/3448 cut-off events. [2024-06-03 20:40:59,400 INFO L125 PetriNetUnfolderBase]: For 120924/120924 co-relation queries the response was YES. [2024-06-03 20:40:59,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20502 conditions, 3448 events. 2020/3448 cut-off events. For 120924/120924 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21550 event pairs, 452 based on Foata normal form. 2/3444 useless extension candidates. Maximal degree in co-relation 20404. Up to 3035 conditions per place. [2024-06-03 20:40:59,434 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 54 changer transitions 0/250 dead transitions. [2024-06-03 20:40:59,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 250 transitions, 3249 flow [2024-06-03 20:40:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:40:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:40:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:40:59,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-03 20:40:59,435 INFO L175 Difference]: Start difference. First operand has 207 places, 235 transitions, 2629 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:40:59,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 250 transitions, 3249 flow [2024-06-03 20:40:59,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 250 transitions, 3043 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:59,725 INFO L231 Difference]: Finished difference. Result has 209 places, 235 transitions, 2539 flow [2024-06-03 20:40:59,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2539, PETRI_PLACES=209, PETRI_TRANSITIONS=235} [2024-06-03 20:40:59,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-03 20:40:59,726 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 235 transitions, 2539 flow [2024-06-03 20:40:59,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:59,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:59,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:59,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:40:59,726 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:59,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1760160051, now seen corresponding path program 4 times [2024-06-03 20:40:59,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:59,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018104805] [2024-06-03 20:40:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:59,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:59,945 INFO 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 20:40:59,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018104805] [2024-06-03 20:40:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018104805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:59,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:59,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:40:59,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654319853] [2024-06-03 20:40:59,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:59,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:40:59,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:40:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:40:59,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:40:59,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 235 transitions, 2539 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:40:59,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:59,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:40:59,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:00,483 INFO L124 PetriNetUnfolderBase]: 2032/3470 cut-off events. [2024-06-03 20:41:00,484 INFO L125 PetriNetUnfolderBase]: For 124980/124980 co-relation queries the response was YES. [2024-06-03 20:41:00,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20600 conditions, 3470 events. 2032/3470 cut-off events. For 124980/124980 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21750 event pairs, 452 based on Foata normal form. 2/3466 useless extension candidates. Maximal degree in co-relation 20501. Up to 2977 conditions per place. [2024-06-03 20:41:00,512 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 179 selfloop transitions, 72 changer transitions 0/258 dead transitions. [2024-06-03 20:41:00,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 258 transitions, 3299 flow [2024-06-03 20:41:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:41:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:41:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:41:00,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:41:00,513 INFO L175 Difference]: Start difference. First operand has 209 places, 235 transitions, 2539 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:41:00,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 258 transitions, 3299 flow [2024-06-03 20:41:00,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 258 transitions, 3191 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:00,786 INFO L231 Difference]: Finished difference. Result has 210 places, 240 transitions, 2729 flow [2024-06-03 20:41:00,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2729, PETRI_PLACES=210, PETRI_TRANSITIONS=240} [2024-06-03 20:41:00,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-03 20:41:00,786 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 240 transitions, 2729 flow [2024-06-03 20:41:00,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:00,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:00,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:00,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:41:00,787 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:00,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:00,787 INFO L85 PathProgramCache]: Analyzing trace with hash 576175191, now seen corresponding path program 5 times [2024-06-03 20:41:00,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:00,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571877221] [2024-06-03 20:41:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:00,998 INFO 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 20:41:00,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:00,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571877221] [2024-06-03 20:41:00,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571877221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:00,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:00,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:00,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297499112] [2024-06-03 20:41:00,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:00,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:01,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:01,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:01,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:01,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:01,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 240 transitions, 2729 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:01,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:01,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:01,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:01,499 INFO L124 PetriNetUnfolderBase]: 2050/3502 cut-off events. [2024-06-03 20:41:01,499 INFO L125 PetriNetUnfolderBase]: For 133085/133088 co-relation queries the response was YES. [2024-06-03 20:41:01,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21276 conditions, 3502 events. 2050/3502 cut-off events. For 133085/133088 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22009 event pairs, 471 based on Foata normal form. 4/3498 useless extension candidates. Maximal degree in co-relation 21175. Up to 2996 conditions per place. [2024-06-03 20:41:01,531 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 169 selfloop transitions, 89 changer transitions 0/265 dead transitions. [2024-06-03 20:41:01,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 265 transitions, 3647 flow [2024-06-03 20:41:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:41:01,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:41:01,532 INFO L175 Difference]: Start difference. First operand has 210 places, 240 transitions, 2729 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:41:01,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 265 transitions, 3647 flow [2024-06-03 20:41:01,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 265 transitions, 3411 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:01,850 INFO L231 Difference]: Finished difference. Result has 213 places, 248 transitions, 2842 flow [2024-06-03 20:41:01,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2842, PETRI_PLACES=213, PETRI_TRANSITIONS=248} [2024-06-03 20:41:01,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-03 20:41:01,851 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 248 transitions, 2842 flow [2024-06-03 20:41:01,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:01,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:01,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:01,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:41:01,852 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:01,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1760165631, now seen corresponding path program 6 times [2024-06-03 20:41:01,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:01,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413271021] [2024-06-03 20:41:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:01,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:02,078 INFO 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 20:41:02,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:02,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413271021] [2024-06-03 20:41:02,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413271021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:02,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:02,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:02,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372136744] [2024-06-03 20:41:02,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:02,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:02,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:02,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:02,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 248 transitions, 2842 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:02,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:02,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:02,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:02,647 INFO L124 PetriNetUnfolderBase]: 2044/3493 cut-off events. [2024-06-03 20:41:02,648 INFO L125 PetriNetUnfolderBase]: For 129268/129268 co-relation queries the response was YES. [2024-06-03 20:41:02,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20995 conditions, 3493 events. 2044/3493 cut-off events. For 129268/129268 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21955 event pairs, 452 based on Foata normal form. 2/3489 useless extension candidates. Maximal degree in co-relation 20894. Up to 2991 conditions per place. [2024-06-03 20:41:02,682 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 172 selfloop transitions, 88 changer transitions 0/267 dead transitions. [2024-06-03 20:41:02,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 267 transitions, 3510 flow [2024-06-03 20:41:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:41:02,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 20:41:02,684 INFO L175 Difference]: Start difference. First operand has 213 places, 248 transitions, 2842 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:41:02,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 267 transitions, 3510 flow [2024-06-03 20:41:03,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 267 transitions, 3363 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 20:41:03,007 INFO L231 Difference]: Finished difference. Result has 218 places, 248 transitions, 2883 flow [2024-06-03 20:41:03,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2883, PETRI_PLACES=218, PETRI_TRANSITIONS=248} [2024-06-03 20:41:03,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-03 20:41:03,008 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 248 transitions, 2883 flow [2024-06-03 20:41:03,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:03,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:03,008 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 20:41:03,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:41:03,008 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:03,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash -318125557, now seen corresponding path program 1 times [2024-06-03 20:41:03,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:03,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738045787] [2024-06-03 20:41:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:03,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:03,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:03,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738045787] [2024-06-03 20:41:03,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738045787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:03,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:03,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:03,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753419674] [2024-06-03 20:41:03,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:03,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:03,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:03,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:03,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:03,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 248 transitions, 2883 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:03,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:03,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:03,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:03,747 INFO L124 PetriNetUnfolderBase]: 2073/3538 cut-off events. [2024-06-03 20:41:03,747 INFO L125 PetriNetUnfolderBase]: For 137165/137168 co-relation queries the response was YES. [2024-06-03 20:41:03,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21789 conditions, 3538 events. 2073/3538 cut-off events. For 137165/137168 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22224 event pairs, 473 based on Foata normal form. 1/3528 useless extension candidates. Maximal degree in co-relation 21686. Up to 2992 conditions per place. [2024-06-03 20:41:03,779 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 175 selfloop transitions, 101 changer transitions 0/283 dead transitions. [2024-06-03 20:41:03,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 283 transitions, 3901 flow [2024-06-03 20:41:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:41:03,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 20:41:03,781 INFO L175 Difference]: Start difference. First operand has 218 places, 248 transitions, 2883 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:41:03,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 283 transitions, 3901 flow [2024-06-03 20:41:04,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 283 transitions, 3631 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 20:41:04,098 INFO L231 Difference]: Finished difference. Result has 216 places, 258 transitions, 3021 flow [2024-06-03 20:41:04,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3021, PETRI_PLACES=216, PETRI_TRANSITIONS=258} [2024-06-03 20:41:04,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-03 20:41:04,098 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 258 transitions, 3021 flow [2024-06-03 20:41:04,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:04,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:04,099 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 20:41:04,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:41:04,099 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:04,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2073731749, now seen corresponding path program 2 times [2024-06-03 20:41:04,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:04,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333848638] [2024-06-03 20:41:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:04,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:04,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:04,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333848638] [2024-06-03 20:41:04,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333848638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:04,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:04,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:04,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134684682] [2024-06-03 20:41:04,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:04,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:04,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:04,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:04,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:04,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:04,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 258 transitions, 3021 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:04,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:04,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:04,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:04,856 INFO L124 PetriNetUnfolderBase]: 2070/3538 cut-off events. [2024-06-03 20:41:04,856 INFO L125 PetriNetUnfolderBase]: For 135324/135327 co-relation queries the response was YES. [2024-06-03 20:41:04,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21648 conditions, 3538 events. 2070/3538 cut-off events. For 135324/135327 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22263 event pairs, 454 based on Foata normal form. 3/3534 useless extension candidates. Maximal degree in co-relation 21545. Up to 3134 conditions per place. [2024-06-03 20:41:04,890 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 53 changer transitions 0/278 dead transitions. [2024-06-03 20:41:04,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 278 transitions, 3613 flow [2024-06-03 20:41:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:41:04,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-03 20:41:04,891 INFO L175 Difference]: Start difference. First operand has 216 places, 258 transitions, 3021 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:41:04,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 278 transitions, 3613 flow [2024-06-03 20:41:05,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 278 transitions, 3426 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 20:41:05,247 INFO L231 Difference]: Finished difference. Result has 220 places, 258 transitions, 2946 flow [2024-06-03 20:41:05,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2946, PETRI_PLACES=220, PETRI_TRANSITIONS=258} [2024-06-03 20:41:05,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-03 20:41:05,248 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 258 transitions, 2946 flow [2024-06-03 20:41:05,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:05,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:05,248 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 20:41:05,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:41:05,249 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:05,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1149949169, now seen corresponding path program 3 times [2024-06-03 20:41:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:05,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997568683] [2024-06-03 20:41:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:05,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:05,464 INFO 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 20:41:05,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:05,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997568683] [2024-06-03 20:41:05,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997568683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:05,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:05,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:05,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987433658] [2024-06-03 20:41:05,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:05,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:05,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:05,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:05,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 258 transitions, 2946 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:05,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:05,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:05,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:05,979 INFO L124 PetriNetUnfolderBase]: 2098/3585 cut-off events. [2024-06-03 20:41:05,980 INFO L125 PetriNetUnfolderBase]: For 141480/141483 co-relation queries the response was YES. [2024-06-03 20:41:06,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21962 conditions, 3585 events. 2098/3585 cut-off events. For 141480/141483 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22576 event pairs, 454 based on Foata normal form. 3/3581 useless extension candidates. Maximal degree in co-relation 21858. Up to 3155 conditions per place. [2024-06-03 20:41:06,013 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 68 changer transitions 0/292 dead transitions. [2024-06-03 20:41:06,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 292 transitions, 3911 flow [2024-06-03 20:41:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:41:06,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-03 20:41:06,014 INFO L175 Difference]: Start difference. First operand has 220 places, 258 transitions, 2946 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:41:06,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 292 transitions, 3911 flow [2024-06-03 20:41:06,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 292 transitions, 3763 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:06,410 INFO L231 Difference]: Finished difference. Result has 226 places, 273 transitions, 3217 flow [2024-06-03 20:41:06,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3217, PETRI_PLACES=226, PETRI_TRANSITIONS=273} [2024-06-03 20:41:06,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-03 20:41:06,410 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 273 transitions, 3217 flow [2024-06-03 20:41:06,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:06,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:06,411 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 20:41:06,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:41:06,411 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:06,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash -283523795, now seen corresponding path program 4 times [2024-06-03 20:41:06,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:06,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252673289] [2024-06-03 20:41:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:06,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:06,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:06,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252673289] [2024-06-03 20:41:06,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252673289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:06,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:06,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:06,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846417612] [2024-06-03 20:41:06,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:06,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:06,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:06,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:06,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:06,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 273 transitions, 3217 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:06,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:06,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:06,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:07,181 INFO L124 PetriNetUnfolderBase]: 2135/3641 cut-off events. [2024-06-03 20:41:07,182 INFO L125 PetriNetUnfolderBase]: For 152757/152757 co-relation queries the response was YES. [2024-06-03 20:41:07,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22782 conditions, 3641 events. 2135/3641 cut-off events. For 152757/152757 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22991 event pairs, 452 based on Foata normal form. 1/3636 useless extension candidates. Maximal degree in co-relation 22675. Up to 3040 conditions per place. [2024-06-03 20:41:07,216 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 117 changer transitions 0/307 dead transitions. [2024-06-03 20:41:07,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 307 transitions, 4386 flow [2024-06-03 20:41:07,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:41:07,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 20:41:07,218 INFO L175 Difference]: Start difference. First operand has 226 places, 273 transitions, 3217 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:41:07,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 307 transitions, 4386 flow [2024-06-03 20:41:07,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 307 transitions, 4264 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-03 20:41:07,623 INFO L231 Difference]: Finished difference. Result has 231 places, 284 transitions, 3524 flow [2024-06-03 20:41:07,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3524, PETRI_PLACES=231, PETRI_TRANSITIONS=284} [2024-06-03 20:41:07,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-03 20:41:07,624 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 284 transitions, 3524 flow [2024-06-03 20:41:07,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:07,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:07,624 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 20:41:07,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:41:07,625 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:07,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:07,625 INFO L85 PathProgramCache]: Analyzing trace with hash -45239925, now seen corresponding path program 5 times [2024-06-03 20:41:07,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:07,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002722930] [2024-06-03 20:41:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:07,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:07,832 INFO 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 20:41:07,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:07,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002722930] [2024-06-03 20:41:07,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002722930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:07,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:07,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:07,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775913659] [2024-06-03 20:41:07,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:07,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:07,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:07,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:07,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:07,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:07,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 284 transitions, 3524 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:07,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:07,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:07,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:08,355 INFO L124 PetriNetUnfolderBase]: 2140/3650 cut-off events. [2024-06-03 20:41:08,355 INFO L125 PetriNetUnfolderBase]: For 158822/158822 co-relation queries the response was YES. [2024-06-03 20:41:08,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23142 conditions, 3650 events. 2140/3650 cut-off events. For 158822/158822 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 23064 event pairs, 452 based on Foata normal form. 1/3645 useless extension candidates. Maximal degree in co-relation 23034. Up to 3044 conditions per place. [2024-06-03 20:41:08,391 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 117 changer transitions 0/309 dead transitions. [2024-06-03 20:41:08,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 309 transitions, 4453 flow [2024-06-03 20:41:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:41:08,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 20:41:08,392 INFO L175 Difference]: Start difference. First operand has 231 places, 284 transitions, 3524 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:41:08,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 309 transitions, 4453 flow [2024-06-03 20:41:08,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 309 transitions, 4179 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:08,793 INFO L231 Difference]: Finished difference. Result has 234 places, 287 transitions, 3541 flow [2024-06-03 20:41:08,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3541, PETRI_PLACES=234, PETRI_TRANSITIONS=287} [2024-06-03 20:41:08,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-03 20:41:08,794 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 287 transitions, 3541 flow [2024-06-03 20:41:08,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:08,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:08,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:08,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:41:08,795 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:08,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1377393873, now seen corresponding path program 6 times [2024-06-03 20:41:08,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:08,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698963537] [2024-06-03 20:41:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:08,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:09,004 INFO 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 20:41:09,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:09,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698963537] [2024-06-03 20:41:09,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698963537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:09,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:09,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:09,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113845433] [2024-06-03 20:41:09,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:09,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:09,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:09,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:09,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:09,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:09,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 287 transitions, 3541 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:09,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:09,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:09,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:09,568 INFO L124 PetriNetUnfolderBase]: 2132/3638 cut-off events. [2024-06-03 20:41:09,568 INFO L125 PetriNetUnfolderBase]: For 161852/161852 co-relation queries the response was YES. [2024-06-03 20:41:09,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23027 conditions, 3638 events. 2132/3638 cut-off events. For 161852/161852 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22984 event pairs, 452 based on Foata normal form. 2/3634 useless extension candidates. Maximal degree in co-relation 22918. Up to 3036 conditions per place. [2024-06-03 20:41:09,604 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 109 changer transitions 0/305 dead transitions. [2024-06-03 20:41:09,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 305 transitions, 4293 flow [2024-06-03 20:41:09,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:41:09,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:41:09,605 INFO L175 Difference]: Start difference. First operand has 234 places, 287 transitions, 3541 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:41:09,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 305 transitions, 4293 flow [2024-06-03 20:41:10,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 305 transitions, 3988 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:10,031 INFO L231 Difference]: Finished difference. Result has 236 places, 287 transitions, 3462 flow [2024-06-03 20:41:10,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3462, PETRI_PLACES=236, PETRI_TRANSITIONS=287} [2024-06-03 20:41:10,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-03 20:41:10,032 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 287 transitions, 3462 flow [2024-06-03 20:41:10,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:10,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:10,032 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 20:41:10,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:41:10,032 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:10,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1108633173, now seen corresponding path program 7 times [2024-06-03 20:41:10,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:10,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304681696] [2024-06-03 20:41:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:10,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:10,266 INFO 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 20:41:10,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:10,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304681696] [2024-06-03 20:41:10,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304681696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:10,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:10,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:10,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559505314] [2024-06-03 20:41:10,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:10,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:10,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:10,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:10,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 287 transitions, 3462 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:10,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:10,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:10,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:10,809 INFO L124 PetriNetUnfolderBase]: 2129/3634 cut-off events. [2024-06-03 20:41:10,809 INFO L125 PetriNetUnfolderBase]: For 163436/163436 co-relation queries the response was YES. [2024-06-03 20:41:10,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22935 conditions, 3634 events. 2129/3634 cut-off events. For 163436/163436 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22984 event pairs, 452 based on Foata normal form. 1/3629 useless extension candidates. Maximal degree in co-relation 22825. Up to 3205 conditions per place. [2024-06-03 20:41:10,844 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 57 changer transitions 0/304 dead transitions. [2024-06-03 20:41:10,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 304 transitions, 4098 flow [2024-06-03 20:41:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:41:10,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-03 20:41:10,846 INFO L175 Difference]: Start difference. First operand has 236 places, 287 transitions, 3462 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:41:10,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 304 transitions, 4098 flow [2024-06-03 20:41:11,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 304 transitions, 3840 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:11,248 INFO L231 Difference]: Finished difference. Result has 237 places, 287 transitions, 3324 flow [2024-06-03 20:41:11,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3324, PETRI_PLACES=237, PETRI_TRANSITIONS=287} [2024-06-03 20:41:11,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-03 20:41:11,249 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 287 transitions, 3324 flow [2024-06-03 20:41:11,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:11,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:11,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:11,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:41:11,250 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:11,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:11,250 INFO L85 PathProgramCache]: Analyzing trace with hash 82431405, now seen corresponding path program 8 times [2024-06-03 20:41:11,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:11,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301891782] [2024-06-03 20:41:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:11,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:11,468 INFO 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 20:41:11,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:11,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301891782] [2024-06-03 20:41:11,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301891782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:11,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:11,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:11,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073785764] [2024-06-03 20:41:11,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:11,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:11,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:11,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 287 transitions, 3324 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:11,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:11,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:11,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:12,022 INFO L124 PetriNetUnfolderBase]: 2123/3626 cut-off events. [2024-06-03 20:41:12,022 INFO L125 PetriNetUnfolderBase]: For 166103/166103 co-relation queries the response was YES. [2024-06-03 20:41:12,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22619 conditions, 3626 events. 2123/3626 cut-off events. For 166103/166103 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22922 event pairs, 452 based on Foata normal form. 2/3622 useless extension candidates. Maximal degree in co-relation 22508. Up to 3156 conditions per place. [2024-06-03 20:41:12,056 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 68 changer transitions 0/302 dead transitions. [2024-06-03 20:41:12,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 302 transitions, 4066 flow [2024-06-03 20:41:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:41:12,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-03 20:41:12,058 INFO L175 Difference]: Start difference. First operand has 237 places, 287 transitions, 3324 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:41:12,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 302 transitions, 4066 flow [2024-06-03 20:41:12,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 302 transitions, 3950 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:12,498 INFO L231 Difference]: Finished difference. Result has 239 places, 287 transitions, 3353 flow [2024-06-03 20:41:12,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3353, PETRI_PLACES=239, PETRI_TRANSITIONS=287} [2024-06-03 20:41:12,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-03 20:41:12,499 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 287 transitions, 3353 flow [2024-06-03 20:41:12,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:12,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:12,499 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 20:41:12,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:41:12,499 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:12,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash 134501339, now seen corresponding path program 9 times [2024-06-03 20:41:12,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:12,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058441289] [2024-06-03 20:41:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:12,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:12,713 INFO 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 20:41:12,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:12,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058441289] [2024-06-03 20:41:12,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058441289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:12,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:12,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:12,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401097012] [2024-06-03 20:41:12,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:12,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:12,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:12,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:12,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:12,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:12,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 287 transitions, 3353 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:12,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:12,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:12,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:13,258 INFO L124 PetriNetUnfolderBase]: 2115/3614 cut-off events. [2024-06-03 20:41:13,258 INFO L125 PetriNetUnfolderBase]: For 167958/167958 co-relation queries the response was YES. [2024-06-03 20:41:13,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 3614 events. 2115/3614 cut-off events. For 167958/167958 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22856 event pairs, 452 based on Foata normal form. 2/3610 useless extension candidates. Maximal degree in co-relation 22437. Up to 3148 conditions per place. [2024-06-03 20:41:13,293 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 72 changer transitions 0/303 dead transitions. [2024-06-03 20:41:13,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 303 transitions, 3983 flow [2024-06-03 20:41:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-03 20:41:13,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-03 20:41:13,295 INFO L175 Difference]: Start difference. First operand has 239 places, 287 transitions, 3353 flow. Second operand 9 states and 201 transitions. [2024-06-03 20:41:13,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 303 transitions, 3983 flow [2024-06-03 20:41:13,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 303 transitions, 3821 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:13,749 INFO L231 Difference]: Finished difference. Result has 244 places, 287 transitions, 3342 flow [2024-06-03 20:41:13,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3342, PETRI_PLACES=244, PETRI_TRANSITIONS=287} [2024-06-03 20:41:13,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-03 20:41:13,750 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 287 transitions, 3342 flow [2024-06-03 20:41:13,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:13,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:13,751 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 20:41:13,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:41:13,751 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:13,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1602514923, now seen corresponding path program 10 times [2024-06-03 20:41:13,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:13,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491011983] [2024-06-03 20:41:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:14,018 INFO 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 20:41:14,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:14,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491011983] [2024-06-03 20:41:14,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491011983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:14,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:14,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:14,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554447155] [2024-06-03 20:41:14,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:14,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:14,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:14,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 287 transitions, 3342 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:14,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:14,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:14,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:14,617 INFO L124 PetriNetUnfolderBase]: 2109/3609 cut-off events. [2024-06-03 20:41:14,617 INFO L125 PetriNetUnfolderBase]: For 169479/169482 co-relation queries the response was YES. [2024-06-03 20:41:14,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22412 conditions, 3609 events. 2109/3609 cut-off events. For 169479/169482 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22812 event pairs, 454 based on Foata normal form. 4/3606 useless extension candidates. Maximal degree in co-relation 22299. Up to 3046 conditions per place. [2024-06-03 20:41:14,652 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 123 changer transitions 0/318 dead transitions. [2024-06-03 20:41:14,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 318 transitions, 4162 flow [2024-06-03 20:41:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:14,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-03 20:41:14,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-03 20:41:14,653 INFO L175 Difference]: Start difference. First operand has 244 places, 287 transitions, 3342 flow. Second operand 8 states and 202 transitions. [2024-06-03 20:41:14,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 318 transitions, 4162 flow [2024-06-03 20:41:15,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 318 transitions, 3926 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-03 20:41:15,089 INFO L231 Difference]: Finished difference. Result has 242 places, 287 transitions, 3371 flow [2024-06-03 20:41:15,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3371, PETRI_PLACES=242, PETRI_TRANSITIONS=287} [2024-06-03 20:41:15,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-03 20:41:15,090 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 287 transitions, 3371 flow [2024-06-03 20:41:15,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:15,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:15,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:15,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:41:15,090 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:15,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1007392813, now seen corresponding path program 11 times [2024-06-03 20:41:15,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:15,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157004199] [2024-06-03 20:41:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:15,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:15,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157004199] [2024-06-03 20:41:15,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157004199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:15,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:15,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:15,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403628381] [2024-06-03 20:41:15,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:15,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:15,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:15,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:15,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:15,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 287 transitions, 3371 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:15,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:15,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:15,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:15,841 INFO L124 PetriNetUnfolderBase]: 2103/3598 cut-off events. [2024-06-03 20:41:15,841 INFO L125 PetriNetUnfolderBase]: For 170616/170616 co-relation queries the response was YES. [2024-06-03 20:41:15,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22414 conditions, 3598 events. 2103/3598 cut-off events. For 170616/170616 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22769 event pairs, 452 based on Foata normal form. 2/3594 useless extension candidates. Maximal degree in co-relation 22301. Up to 3041 conditions per place. [2024-06-03 20:41:15,877 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 197 selfloop transitions, 103 changer transitions 0/307 dead transitions. [2024-06-03 20:41:15,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 307 transitions, 4143 flow [2024-06-03 20:41:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:41:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:41:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 20:41:15,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-03 20:41:15,878 INFO L175 Difference]: Start difference. First operand has 242 places, 287 transitions, 3371 flow. Second operand 6 states and 152 transitions. [2024-06-03 20:41:15,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 307 transitions, 4143 flow [2024-06-03 20:41:16,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 307 transitions, 3826 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-03 20:41:16,403 INFO L231 Difference]: Finished difference. Result has 239 places, 287 transitions, 3287 flow [2024-06-03 20:41:16,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3287, PETRI_PLACES=239, PETRI_TRANSITIONS=287} [2024-06-03 20:41:16,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-03 20:41:16,404 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 287 transitions, 3287 flow [2024-06-03 20:41:16,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:16,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:16,404 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 20:41:16,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:41:16,405 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:16,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1269893725, now seen corresponding path program 12 times [2024-06-03 20:41:16,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:16,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035779601] [2024-06-03 20:41:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:16,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:16,642 INFO 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 20:41:16,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:16,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035779601] [2024-06-03 20:41:16,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035779601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:16,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:16,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:16,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801486271] [2024-06-03 20:41:16,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:16,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:16,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:16,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:16,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:16,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:16,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 287 transitions, 3287 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:16,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:16,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:16,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:17,237 INFO L124 PetriNetUnfolderBase]: 2095/3586 cut-off events. [2024-06-03 20:41:17,237 INFO L125 PetriNetUnfolderBase]: For 156815/156815 co-relation queries the response was YES. [2024-06-03 20:41:17,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21957 conditions, 3586 events. 2095/3586 cut-off events. For 156815/156815 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22684 event pairs, 452 based on Foata normal form. 2/3582 useless extension candidates. Maximal degree in co-relation 21845. Up to 3033 conditions per place. [2024-06-03 20:41:17,272 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 115 changer transitions 0/314 dead transitions. [2024-06-03 20:41:17,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 314 transitions, 3969 flow [2024-06-03 20:41:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 20:41:17,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-03 20:41:17,282 INFO L175 Difference]: Start difference. First operand has 239 places, 287 transitions, 3287 flow. Second operand 8 states and 197 transitions. [2024-06-03 20:41:17,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 314 transitions, 3969 flow [2024-06-03 20:41:17,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 314 transitions, 3677 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 20:41:17,663 INFO L231 Difference]: Finished difference. Result has 239 places, 287 transitions, 3245 flow [2024-06-03 20:41:17,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3245, PETRI_PLACES=239, PETRI_TRANSITIONS=287} [2024-06-03 20:41:17,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-03 20:41:17,664 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 287 transitions, 3245 flow [2024-06-03 20:41:17,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:17,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:17,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:17,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:41:17,665 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:17,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:17,665 INFO L85 PathProgramCache]: Analyzing trace with hash 674896643, now seen corresponding path program 1 times [2024-06-03 20:41:17,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:17,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017054551] [2024-06-03 20:41:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:17,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:17,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:17,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017054551] [2024-06-03 20:41:17,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017054551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:17,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:17,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:41:17,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695095690] [2024-06-03 20:41:17,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:17,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:41:17,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:17,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:41:17,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:41:17,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:41:17,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 287 transitions, 3245 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 20:41:17,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:17,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:41:17,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:18,420 INFO L124 PetriNetUnfolderBase]: 1998/3461 cut-off events. [2024-06-03 20:41:18,420 INFO L125 PetriNetUnfolderBase]: For 157727/157727 co-relation queries the response was YES. [2024-06-03 20:41:18,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21101 conditions, 3461 events. 1998/3461 cut-off events. For 157727/157727 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22051 event pairs, 329 based on Foata normal form. 7/3428 useless extension candidates. Maximal degree in co-relation 20990. Up to 2865 conditions per place. [2024-06-03 20:41:18,454 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 231 selfloop transitions, 28 changer transitions 0/310 dead transitions. [2024-06-03 20:41:18,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 310 transitions, 3849 flow [2024-06-03 20:41:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:41:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:41:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-03 20:41:18,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-03 20:41:18,455 INFO L175 Difference]: Start difference. First operand has 239 places, 287 transitions, 3245 flow. Second operand 5 states and 135 transitions. [2024-06-03 20:41:18,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 310 transitions, 3849 flow [2024-06-03 20:41:18,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 310 transitions, 3592 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-03 20:41:18,901 INFO L231 Difference]: Finished difference. Result has 234 places, 288 transitions, 3069 flow [2024-06-03 20:41:18,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3069, PETRI_PLACES=234, PETRI_TRANSITIONS=288} [2024-06-03 20:41:18,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-03 20:41:18,901 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 288 transitions, 3069 flow [2024-06-03 20:41:18,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 20:41:18,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:18,902 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 20:41:18,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:41:18,902 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:18,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:18,902 INFO L85 PathProgramCache]: Analyzing trace with hash 690133763, now seen corresponding path program 2 times [2024-06-03 20:41:18,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:18,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859339427] [2024-06-03 20:41:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:18,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:19,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:19,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859339427] [2024-06-03 20:41:19,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859339427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:19,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:19,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:41:19,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652442999] [2024-06-03 20:41:19,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:19,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:41:19,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:19,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:41:19,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:41:19,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:41:19,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 288 transitions, 3069 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 20:41:19,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:19,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:41:19,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:19,622 INFO L124 PetriNetUnfolderBase]: 2002/3458 cut-off events. [2024-06-03 20:41:19,623 INFO L125 PetriNetUnfolderBase]: For 142026/142040 co-relation queries the response was YES. [2024-06-03 20:41:19,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20486 conditions, 3458 events. 2002/3458 cut-off events. For 142026/142040 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22097 event pairs, 343 based on Foata normal form. 20/3436 useless extension candidates. Maximal degree in co-relation 20377. Up to 2768 conditions per place. [2024-06-03 20:41:19,654 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 233 selfloop transitions, 25 changer transitions 0/309 dead transitions. [2024-06-03 20:41:19,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 309 transitions, 3787 flow [2024-06-03 20:41:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:41:19,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:41:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-03 20:41:19,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-03 20:41:19,655 INFO L175 Difference]: Start difference. First operand has 234 places, 288 transitions, 3069 flow. Second operand 5 states and 129 transitions. [2024-06-03 20:41:19,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 309 transitions, 3787 flow [2024-06-03 20:41:20,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 309 transitions, 3736 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:41:20,036 INFO L231 Difference]: Finished difference. Result has 236 places, 289 transitions, 3086 flow [2024-06-03 20:41:20,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3018, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3086, PETRI_PLACES=236, PETRI_TRANSITIONS=289} [2024-06-03 20:41:20,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-03 20:41:20,036 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 289 transitions, 3086 flow [2024-06-03 20:41:20,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 20:41:20,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:20,037 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 20:41:20,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:41:20,037 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:20,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:20,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1168297039, now seen corresponding path program 1 times [2024-06-03 20:41:20,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805513689] [2024-06-03 20:41:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:20,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:20,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:20,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805513689] [2024-06-03 20:41:20,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805513689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:20,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:20,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:20,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618208525] [2024-06-03 20:41:20,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:20,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:20,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:20,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:20,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:20,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:20,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 289 transitions, 3086 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:20,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:20,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:20,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:20,798 INFO L124 PetriNetUnfolderBase]: 2117/3651 cut-off events. [2024-06-03 20:41:20,798 INFO L125 PetriNetUnfolderBase]: For 138772/138772 co-relation queries the response was YES. [2024-06-03 20:41:20,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21498 conditions, 3651 events. 2117/3651 cut-off events. For 138772/138772 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23230 event pairs, 411 based on Foata normal form. 2/3650 useless extension candidates. Maximal degree in co-relation 21388. Up to 3248 conditions per place. [2024-06-03 20:41:20,832 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 278 selfloop transitions, 31 changer transitions 0/316 dead transitions. [2024-06-03 20:41:20,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 316 transitions, 3974 flow [2024-06-03 20:41:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:41:20,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-03 20:41:20,834 INFO L175 Difference]: Start difference. First operand has 236 places, 289 transitions, 3086 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:41:20,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 316 transitions, 3974 flow [2024-06-03 20:41:21,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 316 transitions, 3930 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-03 20:41:21,122 INFO L231 Difference]: Finished difference. Result has 241 places, 293 transitions, 3213 flow [2024-06-03 20:41:21,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3042, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3213, PETRI_PLACES=241, PETRI_TRANSITIONS=293} [2024-06-03 20:41:21,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-03 20:41:21,124 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 293 transitions, 3213 flow [2024-06-03 20:41:21,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:21,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:21,124 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 20:41:21,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:41:21,124 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:21,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:21,125 INFO L85 PathProgramCache]: Analyzing trace with hash 914250657, now seen corresponding path program 2 times [2024-06-03 20:41:21,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:21,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921003400] [2024-06-03 20:41:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:21,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:21,358 INFO 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 20:41:21,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:21,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921003400] [2024-06-03 20:41:21,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921003400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:21,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:21,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:21,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632667629] [2024-06-03 20:41:21,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:21,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:21,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:21,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:21,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 293 transitions, 3213 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:21,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:21,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:21,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:21,897 INFO L124 PetriNetUnfolderBase]: 2125/3658 cut-off events. [2024-06-03 20:41:21,898 INFO L125 PetriNetUnfolderBase]: For 143816/143816 co-relation queries the response was YES. [2024-06-03 20:41:21,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21650 conditions, 3658 events. 2125/3658 cut-off events. For 143816/143816 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23252 event pairs, 442 based on Foata normal form. 2/3657 useless extension candidates. Maximal degree in co-relation 21539. Up to 3293 conditions per place. [2024-06-03 20:41:21,933 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 278 selfloop transitions, 28 changer transitions 0/313 dead transitions. [2024-06-03 20:41:21,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 313 transitions, 3923 flow [2024-06-03 20:41:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-03 20:41:21,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-03 20:41:21,934 INFO L175 Difference]: Start difference. First operand has 241 places, 293 transitions, 3213 flow. Second operand 7 states and 158 transitions. [2024-06-03 20:41:21,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 313 transitions, 3923 flow [2024-06-03 20:41:22,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 313 transitions, 3811 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-03 20:41:22,311 INFO L231 Difference]: Finished difference. Result has 245 places, 295 transitions, 3220 flow [2024-06-03 20:41:22,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3220, PETRI_PLACES=245, PETRI_TRANSITIONS=295} [2024-06-03 20:41:22,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-03 20:41:22,312 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 295 transitions, 3220 flow [2024-06-03 20:41:22,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:22,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:22,312 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 20:41:22,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:41:22,312 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:22,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:22,313 INFO L85 PathProgramCache]: Analyzing trace with hash 82441325, now seen corresponding path program 3 times [2024-06-03 20:41:22,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:22,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035414949] [2024-06-03 20:41:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:22,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:22,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:22,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035414949] [2024-06-03 20:41:22,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035414949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:22,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:22,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266131403] [2024-06-03 20:41:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:22,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:22,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:22,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:22,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 295 transitions, 3220 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:22,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:22,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:22,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:23,105 INFO L124 PetriNetUnfolderBase]: 2133/3670 cut-off events. [2024-06-03 20:41:23,105 INFO L125 PetriNetUnfolderBase]: For 148282/148282 co-relation queries the response was YES. [2024-06-03 20:41:23,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21724 conditions, 3670 events. 2133/3670 cut-off events. For 148282/148282 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23317 event pairs, 442 based on Foata normal form. 2/3669 useless extension candidates. Maximal degree in co-relation 21611. Up to 3320 conditions per place. [2024-06-03 20:41:23,142 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 285 selfloop transitions, 20 changer transitions 0/312 dead transitions. [2024-06-03 20:41:23,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 312 transitions, 3906 flow [2024-06-03 20:41:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 20:41:23,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 20:41:23,143 INFO L175 Difference]: Start difference. First operand has 245 places, 295 transitions, 3220 flow. Second operand 7 states and 154 transitions. [2024-06-03 20:41:23,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 312 transitions, 3906 flow [2024-06-03 20:41:23,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 312 transitions, 3825 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:23,512 INFO L231 Difference]: Finished difference. Result has 247 places, 297 transitions, 3228 flow [2024-06-03 20:41:23,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3228, PETRI_PLACES=247, PETRI_TRANSITIONS=297} [2024-06-03 20:41:23,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-03 20:41:23,513 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 297 transitions, 3228 flow [2024-06-03 20:41:23,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:23,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:23,513 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 20:41:23,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:41:23,514 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:23,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:23,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1492879661, now seen corresponding path program 1 times [2024-06-03 20:41:23,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:23,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229161844] [2024-06-03 20:41:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:23,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:23,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:23,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229161844] [2024-06-03 20:41:23,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229161844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:23,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:23,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:23,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971863386] [2024-06-03 20:41:23,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:23,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:23,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:23,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:23,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:23,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:23,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 297 transitions, 3228 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:23,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:23,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:23,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:24,298 INFO L124 PetriNetUnfolderBase]: 2149/3689 cut-off events. [2024-06-03 20:41:24,299 INFO L125 PetriNetUnfolderBase]: For 156763/156763 co-relation queries the response was YES. [2024-06-03 20:41:24,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21919 conditions, 3689 events. 2149/3689 cut-off events. For 156763/156763 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23455 event pairs, 454 based on Foata normal form. 4/3687 useless extension candidates. Maximal degree in co-relation 21805. Up to 3236 conditions per place. [2024-06-03 20:41:24,333 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 253 selfloop transitions, 55 changer transitions 0/315 dead transitions. [2024-06-03 20:41:24,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 315 transitions, 3938 flow [2024-06-03 20:41:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:41:24,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-03 20:41:24,335 INFO L175 Difference]: Start difference. First operand has 247 places, 297 transitions, 3228 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:41:24,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 315 transitions, 3938 flow [2024-06-03 20:41:24,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 315 transitions, 3869 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:24,796 INFO L231 Difference]: Finished difference. Result has 249 places, 300 transitions, 3339 flow [2024-06-03 20:41:24,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3339, PETRI_PLACES=249, PETRI_TRANSITIONS=300} [2024-06-03 20:41:24,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-03 20:41:24,797 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 300 transitions, 3339 flow [2024-06-03 20:41:24,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:24,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:24,798 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 20:41:24,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:41:24,798 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:24,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:24,798 INFO L85 PathProgramCache]: Analyzing trace with hash 453483979, now seen corresponding path program 4 times [2024-06-03 20:41:24,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:24,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417481809] [2024-06-03 20:41:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:24,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:25,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:25,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417481809] [2024-06-03 20:41:25,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417481809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:25,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:25,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:25,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172131104] [2024-06-03 20:41:25,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:25,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:25,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:25,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:25,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:25,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:25,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 300 transitions, 3339 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:25,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:25,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:25,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:25,578 INFO L124 PetriNetUnfolderBase]: 2144/3692 cut-off events. [2024-06-03 20:41:25,579 INFO L125 PetriNetUnfolderBase]: For 154692/154692 co-relation queries the response was YES. [2024-06-03 20:41:25,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22013 conditions, 3692 events. 2144/3692 cut-off events. For 154692/154692 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23462 event pairs, 410 based on Foata normal form. 2/3691 useless extension candidates. Maximal degree in co-relation 21898. Up to 3301 conditions per place. [2024-06-03 20:41:25,614 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 284 selfloop transitions, 29 changer transitions 0/320 dead transitions. [2024-06-03 20:41:25,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 320 transitions, 4015 flow [2024-06-03 20:41:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:41:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:41:25,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 20:41:25,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:41:25,615 INFO L175 Difference]: Start difference. First operand has 249 places, 300 transitions, 3339 flow. Second operand 6 states and 144 transitions. [2024-06-03 20:41:25,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 320 transitions, 4015 flow [2024-06-03 20:41:26,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 320 transitions, 3831 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:26,097 INFO L231 Difference]: Finished difference. Result has 250 places, 300 transitions, 3224 flow [2024-06-03 20:41:26,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3155, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3224, PETRI_PLACES=250, PETRI_TRANSITIONS=300} [2024-06-03 20:41:26,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-03 20:41:26,098 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 300 transitions, 3224 flow [2024-06-03 20:41:26,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:26,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:26,098 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 20:41:26,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:41:26,098 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:26,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:26,099 INFO L85 PathProgramCache]: Analyzing trace with hash 453668677, now seen corresponding path program 2 times [2024-06-03 20:41:26,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:26,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466523759] [2024-06-03 20:41:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:26,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:26,325 INFO 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 20:41:26,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:26,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466523759] [2024-06-03 20:41:26,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466523759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:26,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:26,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:26,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737514809] [2024-06-03 20:41:26,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:26,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:26,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:26,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:26,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:26,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:26,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 300 transitions, 3224 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:26,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:26,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:26,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:26,885 INFO L124 PetriNetUnfolderBase]: 2160/3706 cut-off events. [2024-06-03 20:41:26,886 INFO L125 PetriNetUnfolderBase]: For 162752/162752 co-relation queries the response was YES. [2024-06-03 20:41:26,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22041 conditions, 3706 events. 2160/3706 cut-off events. For 162752/162752 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 23525 event pairs, 453 based on Foata normal form. 4/3704 useless extension candidates. Maximal degree in co-relation 21925. Up to 3241 conditions per place. [2024-06-03 20:41:26,921 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 60 changer transitions 0/317 dead transitions. [2024-06-03 20:41:26,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 317 transitions, 3942 flow [2024-06-03 20:41:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:41:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:41:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 20:41:26,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:41:26,922 INFO L175 Difference]: Start difference. First operand has 250 places, 300 transitions, 3224 flow. Second operand 6 states and 142 transitions. [2024-06-03 20:41:26,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 317 transitions, 3942 flow [2024-06-03 20:41:27,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 317 transitions, 3875 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:27,434 INFO L231 Difference]: Finished difference. Result has 251 places, 303 transitions, 3357 flow [2024-06-03 20:41:27,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3357, PETRI_PLACES=251, PETRI_TRANSITIONS=303} [2024-06-03 20:41:27,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-03 20:41:27,435 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 303 transitions, 3357 flow [2024-06-03 20:41:27,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:27,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:27,435 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 20:41:27,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:41:27,436 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:27,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:27,436 INFO L85 PathProgramCache]: Analyzing trace with hash 689844037, now seen corresponding path program 3 times [2024-06-03 20:41:27,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:27,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129936306] [2024-06-03 20:41:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:27,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:27,662 INFO 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 20:41:27,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:27,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129936306] [2024-06-03 20:41:27,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129936306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:27,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:27,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:27,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655553358] [2024-06-03 20:41:27,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:27,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:27,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:27,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:27,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:27,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:27,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 303 transitions, 3357 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:27,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:27,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:27,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:28,193 INFO L124 PetriNetUnfolderBase]: 2176/3731 cut-off events. [2024-06-03 20:41:28,193 INFO L125 PetriNetUnfolderBase]: For 165374/165377 co-relation queries the response was YES. [2024-06-03 20:41:28,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22489 conditions, 3731 events. 2176/3731 cut-off events. For 165374/165377 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 23772 event pairs, 478 based on Foata normal form. 6/3729 useless extension candidates. Maximal degree in co-relation 22372. Up to 3277 conditions per place. [2024-06-03 20:41:28,230 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 253 selfloop transitions, 57 changer transitions 0/317 dead transitions. [2024-06-03 20:41:28,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 317 transitions, 4073 flow [2024-06-03 20:41:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:41:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:41:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 20:41:28,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-03 20:41:28,231 INFO L175 Difference]: Start difference. First operand has 251 places, 303 transitions, 3357 flow. Second operand 6 states and 139 transitions. [2024-06-03 20:41:28,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 317 transitions, 4073 flow [2024-06-03 20:41:28,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 317 transitions, 3895 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:28,785 INFO L231 Difference]: Finished difference. Result has 253 places, 306 transitions, 3375 flow [2024-06-03 20:41:28,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3185, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3375, PETRI_PLACES=253, PETRI_TRANSITIONS=306} [2024-06-03 20:41:28,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-03 20:41:28,786 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 306 transitions, 3375 flow [2024-06-03 20:41:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:28,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:28,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:28,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:41:28,787 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:28,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash 690140707, now seen corresponding path program 4 times [2024-06-03 20:41:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:28,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459192743] [2024-06-03 20:41:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:28,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:29,019 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 20:41:29,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:29,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459192743] [2024-06-03 20:41:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459192743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:29,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:29,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:41:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458220753] [2024-06-03 20:41:29,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:29,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:41:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:41:29,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:41:29,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:29,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 306 transitions, 3375 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:29,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:29,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:29,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:29,551 INFO L124 PetriNetUnfolderBase]: 2179/3725 cut-off events. [2024-06-03 20:41:29,551 INFO L125 PetriNetUnfolderBase]: For 160552/160555 co-relation queries the response was YES. [2024-06-03 20:41:29,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22249 conditions, 3725 events. 2179/3725 cut-off events. For 160552/160555 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23632 event pairs, 465 based on Foata normal form. 6/3723 useless extension candidates. Maximal degree in co-relation 22131. Up to 3230 conditions per place. [2024-06-03 20:41:29,589 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 248 selfloop transitions, 68 changer transitions 0/323 dead transitions. [2024-06-03 20:41:29,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 323 transitions, 4134 flow [2024-06-03 20:41:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:41:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:41:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-03 20:41:29,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 20:41:29,590 INFO L175 Difference]: Start difference. First operand has 253 places, 306 transitions, 3375 flow. Second operand 6 states and 140 transitions. [2024-06-03 20:41:29,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 323 transitions, 4134 flow [2024-06-03 20:41:30,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 323 transitions, 3966 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:30,138 INFO L231 Difference]: Finished difference. Result has 256 places, 311 transitions, 3472 flow [2024-06-03 20:41:30,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3207, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3472, PETRI_PLACES=256, PETRI_TRANSITIONS=311} [2024-06-03 20:41:30,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-03 20:41:30,139 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 311 transitions, 3472 flow [2024-06-03 20:41:30,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:30,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:30,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:30,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:41:30,140 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:30,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash -542193814, now seen corresponding path program 1 times [2024-06-03 20:41:30,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:30,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505534559] [2024-06-03 20:41:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:30,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:30,401 INFO 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 20:41:30,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:30,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505534559] [2024-06-03 20:41:30,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505534559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:30,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:30,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:30,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087896740] [2024-06-03 20:41:30,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:30,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:30,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:30,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:30,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:30,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:30,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 311 transitions, 3472 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:30,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:30,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:30,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:31,036 INFO L124 PetriNetUnfolderBase]: 2338/4000 cut-off events. [2024-06-03 20:41:31,037 INFO L125 PetriNetUnfolderBase]: For 223071/223071 co-relation queries the response was YES. [2024-06-03 20:41:31,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 4000 events. 2338/4000 cut-off events. For 223071/223071 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25707 event pairs, 412 based on Foata normal form. 12/4006 useless extension candidates. Maximal degree in co-relation 25408. Up to 2885 conditions per place. [2024-06-03 20:41:31,079 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 117 changer transitions 0/351 dead transitions. [2024-06-03 20:41:31,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 351 transitions, 4722 flow [2024-06-03 20:41:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 20:41:31,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-03 20:41:31,080 INFO L175 Difference]: Start difference. First operand has 256 places, 311 transitions, 3472 flow. Second operand 8 states and 197 transitions. [2024-06-03 20:41:31,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 351 transitions, 4722 flow [2024-06-03 20:41:31,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 351 transitions, 4572 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-03 20:41:31,578 INFO L231 Difference]: Finished difference. Result has 263 places, 316 transitions, 3709 flow [2024-06-03 20:41:31,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3709, PETRI_PLACES=263, PETRI_TRANSITIONS=316} [2024-06-03 20:41:31,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-03 20:41:31,579 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 316 transitions, 3709 flow [2024-06-03 20:41:31,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:31,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:31,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:31,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:41:31,580 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:31,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash -250006206, now seen corresponding path program 2 times [2024-06-03 20:41:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:31,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020398457] [2024-06-03 20:41:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:31,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:31,819 INFO 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 20:41:31,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:31,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020398457] [2024-06-03 20:41:31,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020398457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:31,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:31,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:31,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314068946] [2024-06-03 20:41:31,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:31,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:31,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:31,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:31,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:31,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 316 transitions, 3709 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:31,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:31,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:31,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:32,442 INFO L124 PetriNetUnfolderBase]: 2394/4091 cut-off events. [2024-06-03 20:41:32,443 INFO L125 PetriNetUnfolderBase]: For 241884/241884 co-relation queries the response was YES. [2024-06-03 20:41:32,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26738 conditions, 4091 events. 2394/4091 cut-off events. For 241884/241884 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 26404 event pairs, 527 based on Foata normal form. 16/4101 useless extension candidates. Maximal degree in co-relation 26615. Up to 3408 conditions per place. [2024-06-03 20:41:32,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 219 selfloop transitions, 114 changer transitions 0/340 dead transitions. [2024-06-03 20:41:32,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 340 transitions, 4507 flow [2024-06-03 20:41:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:41:32,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:41:32,487 INFO L175 Difference]: Start difference. First operand has 263 places, 316 transitions, 3709 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:41:32,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 340 transitions, 4507 flow [2024-06-03 20:41:33,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 340 transitions, 4321 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-03 20:41:33,094 INFO L231 Difference]: Finished difference. Result has 268 places, 318 transitions, 3819 flow [2024-06-03 20:41:33,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3819, PETRI_PLACES=268, PETRI_TRANSITIONS=318} [2024-06-03 20:41:33,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-03 20:41:33,095 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 318 transitions, 3819 flow [2024-06-03 20:41:33,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:33,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:33,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:33,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:41:33,096 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:33,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:33,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1018343894, now seen corresponding path program 3 times [2024-06-03 20:41:33,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:33,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628874925] [2024-06-03 20:41:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:33,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:33,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:33,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628874925] [2024-06-03 20:41:33,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628874925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:33,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:33,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:33,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359392954] [2024-06-03 20:41:33,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:33,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:33,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:33,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:33,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:33,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 318 transitions, 3819 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:33,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:33,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:33,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:34,020 INFO L124 PetriNetUnfolderBase]: 2500/4261 cut-off events. [2024-06-03 20:41:34,020 INFO L125 PetriNetUnfolderBase]: For 265960/265960 co-relation queries the response was YES. [2024-06-03 20:41:34,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28734 conditions, 4261 events. 2500/4261 cut-off events. For 265960/265960 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27661 event pairs, 536 based on Foata normal form. 12/4267 useless extension candidates. Maximal degree in co-relation 28609. Up to 3414 conditions per place. [2024-06-03 20:41:34,066 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 229 selfloop transitions, 112 changer transitions 0/348 dead transitions. [2024-06-03 20:41:34,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 348 transitions, 4841 flow [2024-06-03 20:41:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:41:34,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-03 20:41:34,068 INFO L175 Difference]: Start difference. First operand has 268 places, 318 transitions, 3819 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:41:34,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 348 transitions, 4841 flow [2024-06-03 20:41:34,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 348 transitions, 4577 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:34,762 INFO L231 Difference]: Finished difference. Result has 271 places, 322 transitions, 3922 flow [2024-06-03 20:41:34,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3922, PETRI_PLACES=271, PETRI_TRANSITIONS=322} [2024-06-03 20:41:34,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-03 20:41:34,763 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 322 transitions, 3922 flow [2024-06-03 20:41:34,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:34,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:34,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:34,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:41:34,763 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:34,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:34,764 INFO L85 PathProgramCache]: Analyzing trace with hash -971091382, now seen corresponding path program 4 times [2024-06-03 20:41:34,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:34,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527311001] [2024-06-03 20:41:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:34,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:34,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:34,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527311001] [2024-06-03 20:41:34,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527311001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:34,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:34,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:34,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038664406] [2024-06-03 20:41:34,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:34,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:34,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:34,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:34,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:35,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:35,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 322 transitions, 3922 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:35,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:35,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:35,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:35,707 INFO L124 PetriNetUnfolderBase]: 2556/4351 cut-off events. [2024-06-03 20:41:35,707 INFO L125 PetriNetUnfolderBase]: For 286386/286386 co-relation queries the response was YES. [2024-06-03 20:41:35,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29504 conditions, 4351 events. 2556/4351 cut-off events. For 286386/286386 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 28351 event pairs, 559 based on Foata normal form. 16/4361 useless extension candidates. Maximal degree in co-relation 29377. Up to 3780 conditions per place. [2024-06-03 20:41:35,758 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 72 changer transitions 0/343 dead transitions. [2024-06-03 20:41:35,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 343 transitions, 4724 flow [2024-06-03 20:41:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:41:35,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:41:35,760 INFO L175 Difference]: Start difference. First operand has 271 places, 322 transitions, 3922 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:41:35,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 343 transitions, 4724 flow [2024-06-03 20:41:36,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 343 transitions, 4534 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:36,454 INFO L231 Difference]: Finished difference. Result has 275 places, 324 transitions, 3950 flow [2024-06-03 20:41:36,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3950, PETRI_PLACES=275, PETRI_TRANSITIONS=324} [2024-06-03 20:41:36,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-03 20:41:36,455 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 324 transitions, 3950 flow [2024-06-03 20:41:36,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:36,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:36,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:36,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:41:36,455 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:36,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:36,456 INFO L85 PathProgramCache]: Analyzing trace with hash -965584852, now seen corresponding path program 5 times [2024-06-03 20:41:36,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:36,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269288507] [2024-06-03 20:41:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:36,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:36,685 INFO 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 20:41:36,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269288507] [2024-06-03 20:41:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269288507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:36,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:36,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:36,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690691720] [2024-06-03 20:41:36,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:36,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:36,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:36,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:36,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:36,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 324 transitions, 3950 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:36,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:36,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:36,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:37,479 INFO L124 PetriNetUnfolderBase]: 2612/4447 cut-off events. [2024-06-03 20:41:37,479 INFO L125 PetriNetUnfolderBase]: For 294350/294350 co-relation queries the response was YES. [2024-06-03 20:41:37,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30253 conditions, 4447 events. 2612/4447 cut-off events. For 294350/294350 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29151 event pairs, 573 based on Foata normal form. 16/4457 useless extension candidates. Maximal degree in co-relation 30124. Up to 3868 conditions per place. [2024-06-03 20:41:37,530 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 78 changer transitions 0/347 dead transitions. [2024-06-03 20:41:37,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 347 transitions, 4768 flow [2024-06-03 20:41:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:41:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:41:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-03 20:41:37,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-03 20:41:37,531 INFO L175 Difference]: Start difference. First operand has 275 places, 324 transitions, 3950 flow. Second operand 10 states and 222 transitions. [2024-06-03 20:41:37,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 347 transitions, 4768 flow [2024-06-03 20:41:38,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 347 transitions, 4580 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:38,147 INFO L231 Difference]: Finished difference. Result has 279 places, 326 transitions, 3996 flow [2024-06-03 20:41:38,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3762, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3996, PETRI_PLACES=279, PETRI_TRANSITIONS=326} [2024-06-03 20:41:38,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-03 20:41:38,148 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 326 transitions, 3996 flow [2024-06-03 20:41:38,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:38,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:38,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:38,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:41:38,149 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:38,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash -971095102, now seen corresponding path program 6 times [2024-06-03 20:41:38,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:38,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500989326] [2024-06-03 20:41:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:38,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:38,383 INFO 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 20:41:38,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:38,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500989326] [2024-06-03 20:41:38,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500989326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:38,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:38,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:38,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590929015] [2024-06-03 20:41:38,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:38,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:38,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:38,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:38,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:38,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 326 transitions, 3996 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:38,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:38,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:38,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:39,162 INFO L124 PetriNetUnfolderBase]: 2718/4615 cut-off events. [2024-06-03 20:41:39,162 INFO L125 PetriNetUnfolderBase]: For 320739/320739 co-relation queries the response was YES. [2024-06-03 20:41:39,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32269 conditions, 4615 events. 2718/4615 cut-off events. For 320739/320739 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30361 event pairs, 580 based on Foata normal form. 12/4621 useless extension candidates. Maximal degree in co-relation 32139. Up to 3790 conditions per place. [2024-06-03 20:41:39,214 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 71 changer transitions 0/353 dead transitions. [2024-06-03 20:41:39,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 353 transitions, 5046 flow [2024-06-03 20:41:39,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:41:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:41:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:41:39,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-03 20:41:39,215 INFO L175 Difference]: Start difference. First operand has 279 places, 326 transitions, 3996 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:41:39,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 353 transitions, 5046 flow [2024-06-03 20:41:40,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 353 transitions, 4842 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-03 20:41:40,022 INFO L231 Difference]: Finished difference. Result has 280 places, 330 transitions, 4101 flow [2024-06-03 20:41:40,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4101, PETRI_PLACES=280, PETRI_TRANSITIONS=330} [2024-06-03 20:41:40,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-03 20:41:40,022 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 330 transitions, 4101 flow [2024-06-03 20:41:40,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:40,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:40,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:40,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:41:40,024 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:40,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:40,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1733559468, now seen corresponding path program 1 times [2024-06-03 20:41:40,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:40,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700957552] [2024-06-03 20:41:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:40,292 INFO 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 20:41:40,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:40,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700957552] [2024-06-03 20:41:40,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700957552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:40,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:40,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:40,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562621061] [2024-06-03 20:41:40,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:40,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:40,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:40,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:40,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:40,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 330 transitions, 4101 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:40,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:40,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:40,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:41,104 INFO L124 PetriNetUnfolderBase]: 2758/4687 cut-off events. [2024-06-03 20:41:41,105 INFO L125 PetriNetUnfolderBase]: For 331120/331120 co-relation queries the response was YES. [2024-06-03 20:41:41,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32795 conditions, 4687 events. 2758/4687 cut-off events. For 331120/331120 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30988 event pairs, 595 based on Foata normal form. 12/4693 useless extension candidates. Maximal degree in co-relation 32663. Up to 3974 conditions per place. [2024-06-03 20:41:41,157 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 85 changer transitions 0/356 dead transitions. [2024-06-03 20:41:41,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 356 transitions, 4955 flow [2024-06-03 20:41:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:41:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:41:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-03 20:41:41,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-03 20:41:41,158 INFO L175 Difference]: Start difference. First operand has 280 places, 330 transitions, 4101 flow. Second operand 10 states and 224 transitions. [2024-06-03 20:41:41,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 356 transitions, 4955 flow [2024-06-03 20:41:42,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 356 transitions, 4801 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 20:41:42,036 INFO L231 Difference]: Finished difference. Result has 286 places, 332 transitions, 4194 flow [2024-06-03 20:41:42,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3947, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4194, PETRI_PLACES=286, PETRI_TRANSITIONS=332} [2024-06-03 20:41:42,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-03 20:41:42,037 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 332 transitions, 4194 flow [2024-06-03 20:41:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:42,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:42,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:42,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:41:42,038 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:42,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash -346385930, now seen corresponding path program 7 times [2024-06-03 20:41:42,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:42,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284800896] [2024-06-03 20:41:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:42,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:42,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:42,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284800896] [2024-06-03 20:41:42,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284800896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:42,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:42,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:42,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674554080] [2024-06-03 20:41:42,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:42,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:42,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:42,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:42,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:42,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 332 transitions, 4194 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:42,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:42,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:42,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:43,091 INFO L124 PetriNetUnfolderBase]: 2814/4776 cut-off events. [2024-06-03 20:41:43,091 INFO L125 PetriNetUnfolderBase]: For 351529/351532 co-relation queries the response was YES. [2024-06-03 20:41:43,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33612 conditions, 4776 events. 2814/4776 cut-off events. For 351529/351532 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31687 event pairs, 636 based on Foata normal form. 18/4786 useless extension candidates. Maximal degree in co-relation 33478. Up to 4098 conditions per place. [2024-06-03 20:41:43,145 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 120 changer transitions 0/354 dead transitions. [2024-06-03 20:41:43,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 354 transitions, 5034 flow [2024-06-03 20:41:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-03 20:41:43,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-03 20:41:43,146 INFO L175 Difference]: Start difference. First operand has 286 places, 332 transitions, 4194 flow. Second operand 9 states and 203 transitions. [2024-06-03 20:41:43,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 354 transitions, 5034 flow [2024-06-03 20:41:43,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 354 transitions, 4811 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-03 20:41:44,003 INFO L231 Difference]: Finished difference. Result has 287 places, 334 transitions, 4299 flow [2024-06-03 20:41:44,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3971, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4299, PETRI_PLACES=287, PETRI_TRANSITIONS=334} [2024-06-03 20:41:44,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-03 20:41:44,004 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 334 transitions, 4299 flow [2024-06-03 20:41:44,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:44,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:44,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:44,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:41:44,004 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:44,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1173250632, now seen corresponding path program 8 times [2024-06-03 20:41:44,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:44,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748297716] [2024-06-03 20:41:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:44,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:44,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:44,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748297716] [2024-06-03 20:41:44,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748297716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:44,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:44,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:44,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707640741] [2024-06-03 20:41:44,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:44,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:44,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:44,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:44,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:44,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 334 transitions, 4299 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:44,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:44,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:44,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:45,157 INFO L124 PetriNetUnfolderBase]: 2870/4875 cut-off events. [2024-06-03 20:41:45,157 INFO L125 PetriNetUnfolderBase]: For 364414/364414 co-relation queries the response was YES. [2024-06-03 20:41:45,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34448 conditions, 4875 events. 2870/4875 cut-off events. For 364414/364414 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32480 event pairs, 633 based on Foata normal form. 16/4885 useless extension candidates. Maximal degree in co-relation 34313. Up to 4122 conditions per place. [2024-06-03 20:41:45,208 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 109 changer transitions 0/357 dead transitions. [2024-06-03 20:41:45,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 357 transitions, 5153 flow [2024-06-03 20:41:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:41:45,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:41:45,209 INFO L175 Difference]: Start difference. First operand has 287 places, 334 transitions, 4299 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:41:45,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 357 transitions, 5153 flow [2024-06-03 20:41:46,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 357 transitions, 4855 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 20:41:46,050 INFO L231 Difference]: Finished difference. Result has 287 places, 336 transitions, 4315 flow [2024-06-03 20:41:46,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4315, PETRI_PLACES=287, PETRI_TRANSITIONS=336} [2024-06-03 20:41:46,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-03 20:41:46,051 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 336 transitions, 4315 flow [2024-06-03 20:41:46,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:46,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:46,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:46,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:41:46,052 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:46,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1178613012, now seen corresponding path program 9 times [2024-06-03 20:41:46,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:46,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223492869] [2024-06-03 20:41:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:46,287 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 20:41:46,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:46,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223492869] [2024-06-03 20:41:46,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223492869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:46,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:46,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:46,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402408794] [2024-06-03 20:41:46,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:46,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:46,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:46,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:46,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:46,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:46,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 336 transitions, 4315 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:46,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:46,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:46,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:47,140 INFO L124 PetriNetUnfolderBase]: 2913/4940 cut-off events. [2024-06-03 20:41:47,141 INFO L125 PetriNetUnfolderBase]: For 368977/368977 co-relation queries the response was YES. [2024-06-03 20:41:47,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34782 conditions, 4940 events. 2913/4940 cut-off events. For 368977/368977 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33004 event pairs, 636 based on Foata normal form. 16/4950 useless extension candidates. Maximal degree in co-relation 34646. Up to 4191 conditions per place. [2024-06-03 20:41:47,199 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 121 changer transitions 0/361 dead transitions. [2024-06-03 20:41:47,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 361 transitions, 5185 flow [2024-06-03 20:41:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-03 20:41:47,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-03 20:41:47,200 INFO L175 Difference]: Start difference. First operand has 287 places, 336 transitions, 4315 flow. Second operand 9 states and 206 transitions. [2024-06-03 20:41:47,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 361 transitions, 5185 flow [2024-06-03 20:41:48,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 361 transitions, 4915 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 20:41:48,122 INFO L231 Difference]: Finished difference. Result has 291 places, 338 transitions, 4387 flow [2024-06-03 20:41:48,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4045, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4387, PETRI_PLACES=291, PETRI_TRANSITIONS=338} [2024-06-03 20:41:48,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-03 20:41:48,123 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 338 transitions, 4387 flow [2024-06-03 20:41:48,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:48,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:48,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:48,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:41:48,123 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:48,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1173102762, now seen corresponding path program 10 times [2024-06-03 20:41:48,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:48,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720605240] [2024-06-03 20:41:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:48,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:48,367 INFO 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 20:41:48,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:48,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720605240] [2024-06-03 20:41:48,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720605240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:48,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:48,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:48,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235738789] [2024-06-03 20:41:48,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:48,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:48,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:48,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:48,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 338 transitions, 4387 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:48,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:48,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:48,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:49,214 INFO L124 PetriNetUnfolderBase]: 2927/4985 cut-off events. [2024-06-03 20:41:49,214 INFO L125 PetriNetUnfolderBase]: For 349665/349665 co-relation queries the response was YES. [2024-06-03 20:41:49,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34433 conditions, 4985 events. 2927/4985 cut-off events. For 349665/349665 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 33390 event pairs, 525 based on Foata normal form. 12/4991 useless extension candidates. Maximal degree in co-relation 34296. Up to 3550 conditions per place. [2024-06-03 20:41:49,277 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 117 changer transitions 0/369 dead transitions. [2024-06-03 20:41:49,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 369 transitions, 5481 flow [2024-06-03 20:41:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 20:41:49,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:41:49,279 INFO L175 Difference]: Start difference. First operand has 291 places, 338 transitions, 4387 flow. Second operand 7 states and 175 transitions. [2024-06-03 20:41:49,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 369 transitions, 5481 flow [2024-06-03 20:41:50,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 369 transitions, 5183 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 20:41:50,202 INFO L231 Difference]: Finished difference. Result has 292 places, 341 transitions, 4514 flow [2024-06-03 20:41:50,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4089, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4514, PETRI_PLACES=292, PETRI_TRANSITIONS=341} [2024-06-03 20:41:50,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-03 20:41:50,203 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 341 transitions, 4514 flow [2024-06-03 20:41:50,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:50,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:50,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:50,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:41:50,204 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:50,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1820819982, now seen corresponding path program 2 times [2024-06-03 20:41:50,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:50,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712634488] [2024-06-03 20:41:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:50,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:50,423 INFO 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 20:41:50,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:50,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712634488] [2024-06-03 20:41:50,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712634488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:50,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:50,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:50,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215433375] [2024-06-03 20:41:50,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:50,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:50,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:50,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:50,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:50,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 341 transitions, 4514 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:50,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:50,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:50,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:51,334 INFO L124 PetriNetUnfolderBase]: 2967/5040 cut-off events. [2024-06-03 20:41:51,334 INFO L125 PetriNetUnfolderBase]: For 360614/360614 co-relation queries the response was YES. [2024-06-03 20:41:51,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35158 conditions, 5040 events. 2967/5040 cut-off events. For 360614/360614 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33788 event pairs, 622 based on Foata normal form. 12/5046 useless extension candidates. Maximal degree in co-relation 35019. Up to 4033 conditions per place. [2024-06-03 20:41:51,391 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 135 changer transitions 0/369 dead transitions. [2024-06-03 20:41:51,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 369 transitions, 5412 flow [2024-06-03 20:41:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:41:51,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-03 20:41:51,393 INFO L175 Difference]: Start difference. First operand has 292 places, 341 transitions, 4514 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:41:51,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 369 transitions, 5412 flow [2024-06-03 20:41:52,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 369 transitions, 5004 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:52,320 INFO L231 Difference]: Finished difference. Result has 295 places, 343 transitions, 4468 flow [2024-06-03 20:41:52,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4468, PETRI_PLACES=295, PETRI_TRANSITIONS=343} [2024-06-03 20:41:52,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-03 20:41:52,320 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 343 transitions, 4468 flow [2024-06-03 20:41:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:52,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:52,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:52,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:41:52,321 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:52,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:52,321 INFO L85 PathProgramCache]: Analyzing trace with hash -89670218, now seen corresponding path program 3 times [2024-06-03 20:41:52,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:52,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517729709] [2024-06-03 20:41:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:52,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:52,545 INFO 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 20:41:52,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517729709] [2024-06-03 20:41:52,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517729709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:52,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:52,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:52,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204905190] [2024-06-03 20:41:52,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:52,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:52,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:52,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:52,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:52,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 343 transitions, 4468 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:52,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:52,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:52,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:53,440 INFO L124 PetriNetUnfolderBase]: 3007/5113 cut-off events. [2024-06-03 20:41:53,440 INFO L125 PetriNetUnfolderBase]: For 356852/356855 co-relation queries the response was YES. [2024-06-03 20:41:53,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34909 conditions, 5113 events. 3007/5113 cut-off events. For 356852/356855 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 34465 event pairs, 667 based on Foata normal form. 14/5119 useless extension candidates. Maximal degree in co-relation 34770. Up to 4349 conditions per place. [2024-06-03 20:41:53,503 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 237 selfloop transitions, 125 changer transitions 0/369 dead transitions. [2024-06-03 20:41:53,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 369 transitions, 5362 flow [2024-06-03 20:41:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:41:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:41:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-03 20:41:53,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-03 20:41:53,504 INFO L175 Difference]: Start difference. First operand has 295 places, 343 transitions, 4468 flow. Second operand 10 states and 224 transitions. [2024-06-03 20:41:53,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 369 transitions, 5362 flow [2024-06-03 20:41:54,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 369 transitions, 5026 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 20:41:54,575 INFO L231 Difference]: Finished difference. Result has 298 places, 345 transitions, 4473 flow [2024-06-03 20:41:54,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4473, PETRI_PLACES=298, PETRI_TRANSITIONS=345} [2024-06-03 20:41:54,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-03 20:41:54,584 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 345 transitions, 4473 flow [2024-06-03 20:41:54,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:54,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:54,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:54,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:41:54,585 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:54,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:54,585 INFO L85 PathProgramCache]: Analyzing trace with hash -80473448, now seen corresponding path program 4 times [2024-06-03 20:41:54,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:54,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153620388] [2024-06-03 20:41:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:54,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:54,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:54,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153620388] [2024-06-03 20:41:54,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153620388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:54,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:54,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:41:54,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136895256] [2024-06-03 20:41:54,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:54,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:41:54,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:41:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:41:54,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:54,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 345 transitions, 4473 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:54,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:54,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:54,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:55,801 INFO L124 PetriNetUnfolderBase]: 3014/5134 cut-off events. [2024-06-03 20:41:55,801 INFO L125 PetriNetUnfolderBase]: For 336008/336011 co-relation queries the response was YES. [2024-06-03 20:41:55,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34032 conditions, 5134 events. 3014/5134 cut-off events. For 336008/336011 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 34627 event pairs, 649 based on Foata normal form. 14/5140 useless extension candidates. Maximal degree in co-relation 33892. Up to 3910 conditions per place. [2024-06-03 20:41:55,864 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 147 changer transitions 0/370 dead transitions. [2024-06-03 20:41:55,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 370 transitions, 5317 flow [2024-06-03 20:41:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:55,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-03 20:41:55,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-03 20:41:55,865 INFO L175 Difference]: Start difference. First operand has 298 places, 345 transitions, 4473 flow. Second operand 9 states and 206 transitions. [2024-06-03 20:41:55,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 370 transitions, 5317 flow [2024-06-03 20:41:56,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 370 transitions, 5004 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-03 20:41:56,880 INFO L231 Difference]: Finished difference. Result has 299 places, 346 transitions, 4491 flow [2024-06-03 20:41:56,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4491, PETRI_PLACES=299, PETRI_TRANSITIONS=346} [2024-06-03 20:41:56,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-03 20:41:56,880 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 346 transitions, 4491 flow [2024-06-03 20:41:56,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:56,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:56,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:56,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:41:56,881 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:56,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:56,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1104635636, now seen corresponding path program 1 times [2024-06-03 20:41:56,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:56,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350539482] [2024-06-03 20:41:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:56,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:57,183 INFO 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 20:41:57,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:57,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350539482] [2024-06-03 20:41:57,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350539482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:57,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:57,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:57,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223189382] [2024-06-03 20:41:57,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:57,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:57,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:57,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:57,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:57,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 346 transitions, 4491 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:57,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:57,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:57,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:58,115 INFO L124 PetriNetUnfolderBase]: 3035/5173 cut-off events. [2024-06-03 20:41:58,115 INFO L125 PetriNetUnfolderBase]: For 315378/315378 co-relation queries the response was YES. [2024-06-03 20:41:58,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34436 conditions, 5173 events. 3035/5173 cut-off events. For 315378/315378 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 34933 event pairs, 653 based on Foata normal form. 1/5169 useless extension candidates. Maximal degree in co-relation 34295. Up to 4620 conditions per place. [2024-06-03 20:41:58,170 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 67 changer transitions 0/377 dead transitions. [2024-06-03 20:41:58,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 377 transitions, 5577 flow [2024-06-03 20:41:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:41:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:41:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:41:58,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 20:41:58,172 INFO L175 Difference]: Start difference. First operand has 299 places, 346 transitions, 4491 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:41:58,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 377 transitions, 5577 flow [2024-06-03 20:41:59,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 377 transitions, 5129 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-03 20:41:59,190 INFO L231 Difference]: Finished difference. Result has 298 places, 353 transitions, 4357 flow [2024-06-03 20:41:59,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4043, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4357, PETRI_PLACES=298, PETRI_TRANSITIONS=353} [2024-06-03 20:41:59,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-03 20:41:59,191 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 353 transitions, 4357 flow [2024-06-03 20:41:59,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:59,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:59,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:59,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:41:59,191 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:59,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash -163079792, now seen corresponding path program 2 times [2024-06-03 20:41:59,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:59,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344502071] [2024-06-03 20:41:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:59,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:59,475 INFO 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 20:41:59,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:59,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344502071] [2024-06-03 20:41:59,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344502071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:59,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:59,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:59,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377083018] [2024-06-03 20:41:59,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:59,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:59,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:59,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:59,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:59,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:41:59,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 353 transitions, 4357 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:41:59,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:59,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:41:59,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:00,361 INFO L124 PetriNetUnfolderBase]: 3045/5185 cut-off events. [2024-06-03 20:42:00,362 INFO L125 PetriNetUnfolderBase]: For 320643/320643 co-relation queries the response was YES. [2024-06-03 20:42:00,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34230 conditions, 5185 events. 3045/5185 cut-off events. For 320643/320643 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35060 event pairs, 651 based on Foata normal form. 1/5181 useless extension candidates. Maximal degree in co-relation 34089. Up to 4671 conditions per place. [2024-06-03 20:42:00,422 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 52 changer transitions 0/379 dead transitions. [2024-06-03 20:42:00,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 379 transitions, 5256 flow [2024-06-03 20:42:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:42:00,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 20:42:00,423 INFO L175 Difference]: Start difference. First operand has 298 places, 353 transitions, 4357 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:42:00,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 379 transitions, 5256 flow [2024-06-03 20:42:01,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 379 transitions, 5087 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:01,674 INFO L231 Difference]: Finished difference. Result has 301 places, 359 transitions, 4413 flow [2024-06-03 20:42:01,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4413, PETRI_PLACES=301, PETRI_TRANSITIONS=359} [2024-06-03 20:42:01,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-03 20:42:01,674 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 359 transitions, 4413 flow [2024-06-03 20:42:01,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:01,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:01,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:01,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:42:01,677 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:01,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash -363052152, now seen corresponding path program 1 times [2024-06-03 20:42:01,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:01,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296662917] [2024-06-03 20:42:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:01,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:01,941 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 20:42:01,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:01,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296662917] [2024-06-03 20:42:01,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296662917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:01,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:01,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:01,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406885339] [2024-06-03 20:42:01,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:01,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:01,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:01,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:01,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:01,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:01,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 359 transitions, 4413 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:01,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:01,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:01,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:02,764 INFO L124 PetriNetUnfolderBase]: 3058/5199 cut-off events. [2024-06-03 20:42:02,764 INFO L125 PetriNetUnfolderBase]: For 316017/316017 co-relation queries the response was YES. [2024-06-03 20:42:02,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34280 conditions, 5199 events. 3058/5199 cut-off events. For 316017/316017 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35178 event pairs, 669 based on Foata normal form. 1/5191 useless extension candidates. Maximal degree in co-relation 34138. Up to 4619 conditions per place. [2024-06-03 20:42:02,826 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 301 selfloop transitions, 71 changer transitions 0/379 dead transitions. [2024-06-03 20:42:02,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 379 transitions, 5387 flow [2024-06-03 20:42:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:42:02,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:42:02,828 INFO L175 Difference]: Start difference. First operand has 301 places, 359 transitions, 4413 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:42:02,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 379 transitions, 5387 flow [2024-06-03 20:42:03,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 379 transitions, 5289 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:03,836 INFO L231 Difference]: Finished difference. Result has 304 places, 365 transitions, 4523 flow [2024-06-03 20:42:03,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4315, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4523, PETRI_PLACES=304, PETRI_TRANSITIONS=365} [2024-06-03 20:42:03,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-03 20:42:03,837 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 365 transitions, 4523 flow [2024-06-03 20:42:03,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:03,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:03,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:03,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:42:03,838 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:03,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:03,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1640477098, now seen corresponding path program 3 times [2024-06-03 20:42:03,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:03,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483762589] [2024-06-03 20:42:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:03,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:04,097 INFO 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 20:42:04,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:04,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483762589] [2024-06-03 20:42:04,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483762589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:04,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:04,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:04,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377097940] [2024-06-03 20:42:04,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:04,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:04,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:04,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:04,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 365 transitions, 4523 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:04,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:04,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:04,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:05,074 INFO L124 PetriNetUnfolderBase]: 3073/5232 cut-off events. [2024-06-03 20:42:05,075 INFO L125 PetriNetUnfolderBase]: For 323681/323681 co-relation queries the response was YES. [2024-06-03 20:42:05,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34646 conditions, 5232 events. 3073/5232 cut-off events. For 323681/323681 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35406 event pairs, 650 based on Foata normal form. 1/5228 useless extension candidates. Maximal degree in co-relation 34503. Up to 4725 conditions per place. [2024-06-03 20:42:05,138 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 348 selfloop transitions, 49 changer transitions 0/404 dead transitions. [2024-06-03 20:42:05,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 404 transitions, 5522 flow [2024-06-03 20:42:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:42:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:42:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-03 20:42:05,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-03 20:42:05,139 INFO L175 Difference]: Start difference. First operand has 304 places, 365 transitions, 4523 flow. Second operand 11 states and 246 transitions. [2024-06-03 20:42:05,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 404 transitions, 5522 flow [2024-06-03 20:42:06,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 404 transitions, 5475 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 20:42:06,364 INFO L231 Difference]: Finished difference. Result has 313 places, 374 transitions, 4717 flow [2024-06-03 20:42:06,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4717, PETRI_PLACES=313, PETRI_TRANSITIONS=374} [2024-06-03 20:42:06,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-03 20:42:06,365 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 374 transitions, 4717 flow [2024-06-03 20:42:06,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:06,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:06,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:06,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:42:06,366 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:06,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:06,366 INFO L85 PathProgramCache]: Analyzing trace with hash 14051914, now seen corresponding path program 2 times [2024-06-03 20:42:06,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:06,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230815391] [2024-06-03 20:42:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:06,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:06,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:06,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230815391] [2024-06-03 20:42:06,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230815391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:06,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:06,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:06,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515561206] [2024-06-03 20:42:06,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:06,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:06,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:06,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:06,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:06,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:06,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 374 transitions, 4717 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:06,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:06,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:06,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:07,479 INFO L124 PetriNetUnfolderBase]: 3078/5227 cut-off events. [2024-06-03 20:42:07,479 INFO L125 PetriNetUnfolderBase]: For 332016/332016 co-relation queries the response was YES. [2024-06-03 20:42:07,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34918 conditions, 5227 events. 3078/5227 cut-off events. For 332016/332016 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35354 event pairs, 668 based on Foata normal form. 1/5219 useless extension candidates. Maximal degree in co-relation 34773. Up to 4638 conditions per place. [2024-06-03 20:42:07,546 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 302 selfloop transitions, 81 changer transitions 0/390 dead transitions. [2024-06-03 20:42:07,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 390 transitions, 5698 flow [2024-06-03 20:42:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-03 20:42:07,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-03 20:42:07,547 INFO L175 Difference]: Start difference. First operand has 313 places, 374 transitions, 4717 flow. Second operand 5 states and 127 transitions. [2024-06-03 20:42:07,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 390 transitions, 5698 flow [2024-06-03 20:42:08,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 390 transitions, 5520 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 20:42:08,644 INFO L231 Difference]: Finished difference. Result has 310 places, 377 transitions, 4757 flow [2024-06-03 20:42:08,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4757, PETRI_PLACES=310, PETRI_TRANSITIONS=377} [2024-06-03 20:42:08,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-03 20:42:08,645 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 377 transitions, 4757 flow [2024-06-03 20:42:08,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:08,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:08,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:08,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:42:08,645 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:08,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:08,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1640714434, now seen corresponding path program 3 times [2024-06-03 20:42:08,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:08,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460029146] [2024-06-03 20:42:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:08,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:08,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:08,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460029146] [2024-06-03 20:42:08,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460029146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:08,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:08,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:08,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144175172] [2024-06-03 20:42:08,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:08,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:08,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:08,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:08,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 377 transitions, 4757 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:08,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:08,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:08,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:09,782 INFO L124 PetriNetUnfolderBase]: 3075/5223 cut-off events. [2024-06-03 20:42:09,782 INFO L125 PetriNetUnfolderBase]: For 336745/336745 co-relation queries the response was YES. [2024-06-03 20:42:09,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34976 conditions, 5223 events. 3075/5223 cut-off events. For 336745/336745 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35328 event pairs, 665 based on Foata normal form. 1/5215 useless extension candidates. Maximal degree in co-relation 34830. Up to 4635 conditions per place. [2024-06-03 20:42:09,841 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 296 selfloop transitions, 88 changer transitions 0/391 dead transitions. [2024-06-03 20:42:09,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 391 transitions, 5559 flow [2024-06-03 20:42:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:42:09,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-03 20:42:09,842 INFO L175 Difference]: Start difference. First operand has 310 places, 377 transitions, 4757 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:42:09,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 391 transitions, 5559 flow [2024-06-03 20:42:10,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 391 transitions, 5442 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:10,978 INFO L231 Difference]: Finished difference. Result has 313 places, 377 transitions, 4827 flow [2024-06-03 20:42:10,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4640, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4827, PETRI_PLACES=313, PETRI_TRANSITIONS=377} [2024-06-03 20:42:10,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-03 20:42:10,979 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 377 transitions, 4827 flow [2024-06-03 20:42:10,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:10,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:10,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:10,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:42:10,979 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:10,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:10,980 INFO L85 PathProgramCache]: Analyzing trace with hash 623824624, now seen corresponding path program 4 times [2024-06-03 20:42:10,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:10,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071795826] [2024-06-03 20:42:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:10,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:11,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:11,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071795826] [2024-06-03 20:42:11,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071795826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:11,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:11,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:11,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180493766] [2024-06-03 20:42:11,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:11,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:11,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:11,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:11,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:11,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:11,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 377 transitions, 4827 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:11,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:11,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:11,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:12,247 INFO L124 PetriNetUnfolderBase]: 3120/5313 cut-off events. [2024-06-03 20:42:12,248 INFO L125 PetriNetUnfolderBase]: For 345552/345555 co-relation queries the response was YES. [2024-06-03 20:42:12,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35875 conditions, 5313 events. 3120/5313 cut-off events. For 345552/345555 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36024 event pairs, 682 based on Foata normal form. 1/5303 useless extension candidates. Maximal degree in co-relation 35730. Up to 4374 conditions per place. [2024-06-03 20:42:12,312 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 200 changer transitions 0/437 dead transitions. [2024-06-03 20:42:12,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 437 transitions, 6575 flow [2024-06-03 20:42:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:42:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:42:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-03 20:42:12,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930735930735931 [2024-06-03 20:42:12,313 INFO L175 Difference]: Start difference. First operand has 313 places, 377 transitions, 4827 flow. Second operand 11 states and 274 transitions. [2024-06-03 20:42:12,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 437 transitions, 6575 flow [2024-06-03 20:42:13,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 437 transitions, 6327 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:13,344 INFO L231 Difference]: Finished difference. Result has 317 places, 392 transitions, 5313 flow [2024-06-03 20:42:13,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5313, PETRI_PLACES=317, PETRI_TRANSITIONS=392} [2024-06-03 20:42:13,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-03 20:42:13,345 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 392 transitions, 5313 flow [2024-06-03 20:42:13,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:13,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:13,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:13,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:42:13,346 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:13,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:13,346 INFO L85 PathProgramCache]: Analyzing trace with hash -123876958, now seen corresponding path program 5 times [2024-06-03 20:42:13,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:13,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334747411] [2024-06-03 20:42:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:13,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:13,583 INFO 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 20:42:13,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:13,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334747411] [2024-06-03 20:42:13,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334747411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:13,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:13,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:13,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344809540] [2024-06-03 20:42:13,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:13,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:13,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:13,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:13,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:13,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:13,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 392 transitions, 5313 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:13,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:13,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:13,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:14,544 INFO L124 PetriNetUnfolderBase]: 3133/5327 cut-off events. [2024-06-03 20:42:14,544 INFO L125 PetriNetUnfolderBase]: For 354117/354120 co-relation queries the response was YES. [2024-06-03 20:42:14,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37097 conditions, 5327 events. 3133/5327 cut-off events. For 354117/354120 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 36137 event pairs, 676 based on Foata normal form. 1/5317 useless extension candidates. Maximal degree in co-relation 36952. Up to 4311 conditions per place. [2024-06-03 20:42:14,611 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 222 changer transitions 0/446 dead transitions. [2024-06-03 20:42:14,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 446 transitions, 7115 flow [2024-06-03 20:42:14,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:42:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:42:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 308 transitions. [2024-06-03 20:42:14,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-03 20:42:14,613 INFO L175 Difference]: Start difference. First operand has 317 places, 392 transitions, 5313 flow. Second operand 13 states and 308 transitions. [2024-06-03 20:42:14,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 446 transitions, 7115 flow [2024-06-03 20:42:15,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 446 transitions, 6567 flow, removed 130 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:15,685 INFO L231 Difference]: Finished difference. Result has 324 places, 401 transitions, 5459 flow [2024-06-03 20:42:15,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5459, PETRI_PLACES=324, PETRI_TRANSITIONS=401} [2024-06-03 20:42:15,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-03 20:42:15,685 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 401 transitions, 5459 flow [2024-06-03 20:42:15,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:15,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:15,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:15,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:42:15,686 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:15,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash -884140788, now seen corresponding path program 6 times [2024-06-03 20:42:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:15,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134684336] [2024-06-03 20:42:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:15,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:15,923 INFO 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 20:42:15,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134684336] [2024-06-03 20:42:15,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134684336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:15,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:15,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:15,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591027013] [2024-06-03 20:42:15,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:15,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:15,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:15,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:15,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:15,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:15,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 401 transitions, 5459 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:15,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:15,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:15,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:16,853 INFO L124 PetriNetUnfolderBase]: 3130/5327 cut-off events. [2024-06-03 20:42:16,853 INFO L125 PetriNetUnfolderBase]: For 359229/359232 co-relation queries the response was YES. [2024-06-03 20:42:16,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37461 conditions, 5327 events. 3130/5327 cut-off events. For 359229/359232 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 36126 event pairs, 678 based on Foata normal form. 1/5317 useless extension candidates. Maximal degree in co-relation 37315. Up to 4309 conditions per place. [2024-06-03 20:42:16,919 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 227 selfloop transitions, 211 changer transitions 0/445 dead transitions. [2024-06-03 20:42:16,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 445 transitions, 7223 flow [2024-06-03 20:42:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:42:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:42:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-06-03 20:42:16,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974025974025974 [2024-06-03 20:42:16,920 INFO L175 Difference]: Start difference. First operand has 324 places, 401 transitions, 5459 flow. Second operand 11 states and 276 transitions. [2024-06-03 20:42:16,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 445 transitions, 7223 flow [2024-06-03 20:42:18,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 445 transitions, 6840 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:18,267 INFO L231 Difference]: Finished difference. Result has 328 places, 401 transitions, 5504 flow [2024-06-03 20:42:18,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5076, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5504, PETRI_PLACES=328, PETRI_TRANSITIONS=401} [2024-06-03 20:42:18,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-03 20:42:18,270 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 401 transitions, 5504 flow [2024-06-03 20:42:18,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:18,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:18,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:18,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:42:18,271 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:18,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:18,271 INFO L85 PathProgramCache]: Analyzing trace with hash -333534112, now seen corresponding path program 4 times [2024-06-03 20:42:18,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:18,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687553733] [2024-06-03 20:42:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:18,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:18,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:18,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687553733] [2024-06-03 20:42:18,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687553733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:18,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:18,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:18,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783820928] [2024-06-03 20:42:18,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:18,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:18,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:18,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:18,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 401 transitions, 5504 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:18,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:18,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:18,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:19,434 INFO L124 PetriNetUnfolderBase]: 3145/5355 cut-off events. [2024-06-03 20:42:19,434 INFO L125 PetriNetUnfolderBase]: For 367894/367894 co-relation queries the response was YES. [2024-06-03 20:42:19,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37765 conditions, 5355 events. 3145/5355 cut-off events. For 367894/367894 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 36478 event pairs, 659 based on Foata normal form. 1/5350 useless extension candidates. Maximal degree in co-relation 37618. Up to 4669 conditions per place. [2024-06-03 20:42:19,501 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 96 changer transitions 0/439 dead transitions. [2024-06-03 20:42:19,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 439 transitions, 6704 flow [2024-06-03 20:42:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 20:42:19,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:42:19,502 INFO L175 Difference]: Start difference. First operand has 328 places, 401 transitions, 5504 flow. Second operand 9 states and 213 transitions. [2024-06-03 20:42:19,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 439 transitions, 6704 flow [2024-06-03 20:42:20,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 439 transitions, 6260 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:42:20,717 INFO L231 Difference]: Finished difference. Result has 330 places, 410 transitions, 5377 flow [2024-06-03 20:42:20,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5073, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5377, PETRI_PLACES=330, PETRI_TRANSITIONS=410} [2024-06-03 20:42:20,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-03 20:42:20,718 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 410 transitions, 5377 flow [2024-06-03 20:42:20,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:20,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:20,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:42:20,719 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:20,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:20,719 INFO L85 PathProgramCache]: Analyzing trace with hash -985610834, now seen corresponding path program 7 times [2024-06-03 20:42:20,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:20,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869762876] [2024-06-03 20:42:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:20,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:20,978 INFO 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 20:42:20,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:20,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869762876] [2024-06-03 20:42:20,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869762876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:20,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:20,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:20,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991886381] [2024-06-03 20:42:20,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:20,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:20,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:20,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:20,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:21,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:21,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 410 transitions, 5377 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:21,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:21,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:21,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:21,996 INFO L124 PetriNetUnfolderBase]: 3150/5363 cut-off events. [2024-06-03 20:42:21,996 INFO L125 PetriNetUnfolderBase]: For 375669/375672 co-relation queries the response was YES. [2024-06-03 20:42:22,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37496 conditions, 5363 events. 3150/5363 cut-off events. For 375669/375672 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 36506 event pairs, 659 based on Foata normal form. 3/5359 useless extension candidates. Maximal degree in co-relation 37348. Up to 4708 conditions per place. [2024-06-03 20:42:22,061 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 340 selfloop transitions, 101 changer transitions 0/448 dead transitions. [2024-06-03 20:42:22,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 448 transitions, 6393 flow [2024-06-03 20:42:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:42:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:42:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-03 20:42:22,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:42:22,063 INFO L175 Difference]: Start difference. First operand has 330 places, 410 transitions, 5377 flow. Second operand 10 states and 240 transitions. [2024-06-03 20:42:22,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 448 transitions, 6393 flow [2024-06-03 20:42:23,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 448 transitions, 6176 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:23,285 INFO L231 Difference]: Finished difference. Result has 335 places, 413 transitions, 5420 flow [2024-06-03 20:42:23,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5160, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5420, PETRI_PLACES=335, PETRI_TRANSITIONS=413} [2024-06-03 20:42:23,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-03 20:42:23,285 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 413 transitions, 5420 flow [2024-06-03 20:42:23,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:23,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:23,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:23,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:42:23,286 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:23,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:23,286 INFO L85 PathProgramCache]: Analyzing trace with hash -522698104, now seen corresponding path program 5 times [2024-06-03 20:42:23,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:23,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321626890] [2024-06-03 20:42:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:23,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:23,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:23,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321626890] [2024-06-03 20:42:23,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321626890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:23,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:23,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:23,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457903418] [2024-06-03 20:42:23,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:23,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:23,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:23,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:23,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:23,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 413 transitions, 5420 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:23,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:23,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:23,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:24,457 INFO L124 PetriNetUnfolderBase]: 3178/5409 cut-off events. [2024-06-03 20:42:24,458 INFO L125 PetriNetUnfolderBase]: For 387458/387458 co-relation queries the response was YES. [2024-06-03 20:42:24,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37796 conditions, 5409 events. 3178/5409 cut-off events. For 387458/387458 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36867 event pairs, 657 based on Foata normal form. 1/5404 useless extension candidates. Maximal degree in co-relation 37648. Up to 4705 conditions per place. [2024-06-03 20:42:24,525 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 119 changer transitions 0/455 dead transitions. [2024-06-03 20:42:24,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 455 transitions, 6863 flow [2024-06-03 20:42:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:42:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:42:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-03 20:42:24,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-03 20:42:24,526 INFO L175 Difference]: Start difference. First operand has 335 places, 413 transitions, 5420 flow. Second operand 11 states and 249 transitions. [2024-06-03 20:42:24,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 455 transitions, 6863 flow [2024-06-03 20:42:25,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 455 transitions, 6623 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:25,946 INFO L231 Difference]: Finished difference. Result has 340 places, 426 transitions, 5603 flow [2024-06-03 20:42:25,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5603, PETRI_PLACES=340, PETRI_TRANSITIONS=426} [2024-06-03 20:42:25,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-03 20:42:25,946 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 426 transitions, 5603 flow [2024-06-03 20:42:25,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:25,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:25,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:25,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:42:25,947 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:25,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:25,947 INFO L85 PathProgramCache]: Analyzing trace with hash -660662324, now seen corresponding path program 8 times [2024-06-03 20:42:25,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:25,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375971188] [2024-06-03 20:42:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:25,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:26,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:26,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375971188] [2024-06-03 20:42:26,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375971188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:26,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:26,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:26,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275343534] [2024-06-03 20:42:26,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:26,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:26,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:26,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:26,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:26,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:26,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 426 transitions, 5603 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:26,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:26,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:26,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:27,194 INFO L124 PetriNetUnfolderBase]: 3191/5438 cut-off events. [2024-06-03 20:42:27,194 INFO L125 PetriNetUnfolderBase]: For 399608/399611 co-relation queries the response was YES. [2024-06-03 20:42:27,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38170 conditions, 5438 events. 3191/5438 cut-off events. For 399608/399611 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 37118 event pairs, 661 based on Foata normal form. 3/5434 useless extension candidates. Maximal degree in co-relation 38020. Up to 4749 conditions per place. [2024-06-03 20:42:27,262 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 337 selfloop transitions, 122 changer transitions 0/466 dead transitions. [2024-06-03 20:42:27,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 466 transitions, 6864 flow [2024-06-03 20:42:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:42:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:42:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-03 20:42:27,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-03 20:42:27,263 INFO L175 Difference]: Start difference. First operand has 340 places, 426 transitions, 5603 flow. Second operand 11 states and 255 transitions. [2024-06-03 20:42:27,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 466 transitions, 6864 flow [2024-06-03 20:42:28,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 466 transitions, 6688 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:28,651 INFO L231 Difference]: Finished difference. Result has 346 places, 432 transitions, 5800 flow [2024-06-03 20:42:28,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5800, PETRI_PLACES=346, PETRI_TRANSITIONS=432} [2024-06-03 20:42:28,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-03 20:42:28,652 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 432 transitions, 5800 flow [2024-06-03 20:42:28,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:28,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:28,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:28,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:42:28,653 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:28,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash 280566160, now seen corresponding path program 9 times [2024-06-03 20:42:28,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:28,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086640385] [2024-06-03 20:42:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:28,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:28,905 INFO 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 20:42:28,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:28,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086640385] [2024-06-03 20:42:28,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086640385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:28,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:28,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:28,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344290136] [2024-06-03 20:42:28,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:28,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:28,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:28,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:28,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 432 transitions, 5800 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:28,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:28,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:28,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:30,077 INFO L124 PetriNetUnfolderBase]: 3188/5434 cut-off events. [2024-06-03 20:42:30,077 INFO L125 PetriNetUnfolderBase]: For 405309/405312 co-relation queries the response was YES. [2024-06-03 20:42:30,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38272 conditions, 5434 events. 3188/5434 cut-off events. For 405309/405312 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 37158 event pairs, 661 based on Foata normal form. 3/5430 useless extension candidates. Maximal degree in co-relation 38120. Up to 4704 conditions per place. [2024-06-03 20:42:30,153 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 145 changer transitions 0/469 dead transitions. [2024-06-03 20:42:30,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 469 transitions, 6980 flow [2024-06-03 20:42:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:42:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:42:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 310 transitions. [2024-06-03 20:42:30,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-03 20:42:30,154 INFO L175 Difference]: Start difference. First operand has 346 places, 432 transitions, 5800 flow. Second operand 14 states and 310 transitions. [2024-06-03 20:42:30,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 469 transitions, 6980 flow [2024-06-03 20:42:31,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 469 transitions, 6737 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:31,768 INFO L231 Difference]: Finished difference. Result has 354 places, 432 transitions, 5853 flow [2024-06-03 20:42:31,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5557, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5853, PETRI_PLACES=354, PETRI_TRANSITIONS=432} [2024-06-03 20:42:31,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-03 20:42:31,769 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 432 transitions, 5853 flow [2024-06-03 20:42:31,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:31,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:31,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:42:31,769 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:31,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:31,770 INFO L85 PathProgramCache]: Analyzing trace with hash 280566346, now seen corresponding path program 6 times [2024-06-03 20:42:31,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:31,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150158501] [2024-06-03 20:42:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:32,007 INFO 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 20:42:32,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:32,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150158501] [2024-06-03 20:42:32,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150158501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:32,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:32,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:32,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698645357] [2024-06-03 20:42:32,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:32,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:32,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:32,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:32,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:32,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:32,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 432 transitions, 5853 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:32,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:32,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:32,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:32,950 INFO L124 PetriNetUnfolderBase]: 3185/5427 cut-off events. [2024-06-03 20:42:32,951 INFO L125 PetriNetUnfolderBase]: For 410309/410309 co-relation queries the response was YES. [2024-06-03 20:42:33,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38313 conditions, 5427 events. 3185/5427 cut-off events. For 410309/410309 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 37086 event pairs, 659 based on Foata normal form. 1/5422 useless extension candidates. Maximal degree in co-relation 38160. Up to 4716 conditions per place. [2024-06-03 20:42:33,023 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 341 selfloop transitions, 111 changer transitions 0/459 dead transitions. [2024-06-03 20:42:33,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 459 transitions, 6991 flow [2024-06-03 20:42:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:42:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:42:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-03 20:42:33,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:42:33,024 INFO L175 Difference]: Start difference. First operand has 354 places, 432 transitions, 5853 flow. Second operand 10 states and 230 transitions. [2024-06-03 20:42:33,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 459 transitions, 6991 flow [2024-06-03 20:42:34,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 459 transitions, 6667 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-03 20:42:34,402 INFO L231 Difference]: Finished difference. Result has 351 places, 432 transitions, 5758 flow [2024-06-03 20:42:34,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5529, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5758, PETRI_PLACES=351, PETRI_TRANSITIONS=432} [2024-06-03 20:42:34,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-03 20:42:34,403 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 432 transitions, 5758 flow [2024-06-03 20:42:34,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:34,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:34,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:34,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:42:34,403 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:34,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash -123928070, now seen corresponding path program 7 times [2024-06-03 20:42:34,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:34,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66833890] [2024-06-03 20:42:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:34,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:34,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:34,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66833890] [2024-06-03 20:42:34,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66833890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:34,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:34,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:34,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097417400] [2024-06-03 20:42:34,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:34,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:34,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:34,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:34,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 432 transitions, 5758 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:34,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:34,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:34,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:35,592 INFO L124 PetriNetUnfolderBase]: 3190/5433 cut-off events. [2024-06-03 20:42:35,592 INFO L125 PetriNetUnfolderBase]: For 420153/420156 co-relation queries the response was YES. [2024-06-03 20:42:35,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38365 conditions, 5433 events. 3190/5433 cut-off events. For 420153/420156 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 37155 event pairs, 678 based on Foata normal form. 3/5428 useless extension candidates. Maximal degree in co-relation 38211. Up to 4722 conditions per place. [2024-06-03 20:42:35,662 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 324 selfloop transitions, 124 changer transitions 0/455 dead transitions. [2024-06-03 20:42:35,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 455 transitions, 6911 flow [2024-06-03 20:42:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-03 20:42:35,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-03 20:42:35,663 INFO L175 Difference]: Start difference. First operand has 351 places, 432 transitions, 5758 flow. Second operand 9 states and 203 transitions. [2024-06-03 20:42:35,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 455 transitions, 6911 flow [2024-06-03 20:42:37,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 455 transitions, 6707 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:37,428 INFO L231 Difference]: Finished difference. Result has 353 places, 435 transitions, 5847 flow [2024-06-03 20:42:37,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5847, PETRI_PLACES=353, PETRI_TRANSITIONS=435} [2024-06-03 20:42:37,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-03 20:42:37,429 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 435 transitions, 5847 flow [2024-06-03 20:42:37,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:37,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:37,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:37,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:42:37,429 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:37,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:37,430 INFO L85 PathProgramCache]: Analyzing trace with hash -289619670, now seen corresponding path program 10 times [2024-06-03 20:42:37,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:37,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565962355] [2024-06-03 20:42:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:37,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:37,684 INFO 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 20:42:37,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:37,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565962355] [2024-06-03 20:42:37,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565962355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:37,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:37,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297576379] [2024-06-03 20:42:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:37,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:37,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:37,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:37,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 435 transitions, 5847 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:37,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:37,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:37,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:38,711 INFO L124 PetriNetUnfolderBase]: 3239/5521 cut-off events. [2024-06-03 20:42:38,711 INFO L125 PetriNetUnfolderBase]: For 440688/440691 co-relation queries the response was YES. [2024-06-03 20:42:38,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39337 conditions, 5521 events. 3239/5521 cut-off events. For 440688/440691 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 37879 event pairs, 661 based on Foata normal form. 3/5517 useless extension candidates. Maximal degree in co-relation 39183. Up to 4783 conditions per place. [2024-06-03 20:42:38,783 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 153 changer transitions 0/489 dead transitions. [2024-06-03 20:42:38,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 489 transitions, 7653 flow [2024-06-03 20:42:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:42:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:42:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-03 20:42:38,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-03 20:42:38,785 INFO L175 Difference]: Start difference. First operand has 353 places, 435 transitions, 5847 flow. Second operand 12 states and 267 transitions. [2024-06-03 20:42:38,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 489 transitions, 7653 flow [2024-06-03 20:42:40,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 489 transitions, 7368 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:40,581 INFO L231 Difference]: Finished difference. Result has 361 places, 459 transitions, 6396 flow [2024-06-03 20:42:40,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5584, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6396, PETRI_PLACES=361, PETRI_TRANSITIONS=459} [2024-06-03 20:42:40,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-03 20:42:40,582 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 459 transitions, 6396 flow [2024-06-03 20:42:40,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:40,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:40,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:40,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:42:40,582 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:40,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1702080362, now seen corresponding path program 8 times [2024-06-03 20:42:40,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:40,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037981693] [2024-06-03 20:42:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:40,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:40,819 INFO 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 20:42:40,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:40,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037981693] [2024-06-03 20:42:40,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037981693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:40,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:40,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:40,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410955109] [2024-06-03 20:42:40,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:40,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:40,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:40,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:40,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:40,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:40,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 459 transitions, 6396 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:40,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:40,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:40,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:41,821 INFO L124 PetriNetUnfolderBase]: 3244/5523 cut-off events. [2024-06-03 20:42:41,822 INFO L125 PetriNetUnfolderBase]: For 450494/450494 co-relation queries the response was YES. [2024-06-03 20:42:41,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39695 conditions, 5523 events. 3244/5523 cut-off events. For 450494/450494 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37853 event pairs, 657 based on Foata normal form. 1/5518 useless extension candidates. Maximal degree in co-relation 39537. Up to 4782 conditions per place. [2024-06-03 20:42:41,894 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 358 selfloop transitions, 125 changer transitions 0/490 dead transitions. [2024-06-03 20:42:41,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 490 transitions, 7639 flow [2024-06-03 20:42:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:42:41,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-03 20:42:41,895 INFO L175 Difference]: Start difference. First operand has 361 places, 459 transitions, 6396 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:42:41,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 490 transitions, 7639 flow [2024-06-03 20:42:43,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 490 transitions, 7386 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:43,908 INFO L231 Difference]: Finished difference. Result has 364 places, 462 transitions, 6445 flow [2024-06-03 20:42:43,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6143, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6445, PETRI_PLACES=364, PETRI_TRANSITIONS=462} [2024-06-03 20:42:43,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-03 20:42:43,908 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 462 transitions, 6445 flow [2024-06-03 20:42:43,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:43,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:43,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:43,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:42:43,909 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:43,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:43,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2135024408, now seen corresponding path program 11 times [2024-06-03 20:42:43,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:43,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929577665] [2024-06-03 20:42:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:43,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:44,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:44,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929577665] [2024-06-03 20:42:44,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929577665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:44,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:44,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:44,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427560084] [2024-06-03 20:42:44,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:44,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:44,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:44,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:44,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 462 transitions, 6445 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:44,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:44,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:44,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:45,228 INFO L124 PetriNetUnfolderBase]: 3241/5522 cut-off events. [2024-06-03 20:42:45,229 INFO L125 PetriNetUnfolderBase]: For 456242/456242 co-relation queries the response was YES. [2024-06-03 20:42:45,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39640 conditions, 5522 events. 3241/5522 cut-off events. For 456242/456242 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37809 event pairs, 648 based on Foata normal form. 1/5518 useless extension candidates. Maximal degree in co-relation 39481. Up to 4965 conditions per place. [2024-06-03 20:42:45,301 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 423 selfloop transitions, 49 changer transitions 0/479 dead transitions. [2024-06-03 20:42:45,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 479 transitions, 7431 flow [2024-06-03 20:42:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:42:45,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-03 20:42:45,303 INFO L175 Difference]: Start difference. First operand has 364 places, 462 transitions, 6445 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:42:45,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 479 transitions, 7431 flow [2024-06-03 20:42:47,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 479 transitions, 7226 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:47,314 INFO L231 Difference]: Finished difference. Result has 364 places, 462 transitions, 6352 flow [2024-06-03 20:42:47,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6240, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6352, PETRI_PLACES=364, PETRI_TRANSITIONS=462} [2024-06-03 20:42:47,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-03 20:42:47,315 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 462 transitions, 6352 flow [2024-06-03 20:42:47,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:47,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:47,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:47,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:42:47,315 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:47,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:47,316 INFO L85 PathProgramCache]: Analyzing trace with hash 446205294, now seen corresponding path program 12 times [2024-06-03 20:42:47,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:47,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042529911] [2024-06-03 20:42:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:47,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:47,563 INFO 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 20:42:47,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:47,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042529911] [2024-06-03 20:42:47,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042529911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:47,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:47,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:47,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855406564] [2024-06-03 20:42:47,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:47,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:47,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:47,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:47,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:47,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:47,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 462 transitions, 6352 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:47,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:47,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:47,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:48,633 INFO L124 PetriNetUnfolderBase]: 3238/5522 cut-off events. [2024-06-03 20:42:48,633 INFO L125 PetriNetUnfolderBase]: For 442545/442548 co-relation queries the response was YES. [2024-06-03 20:42:48,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39239 conditions, 5522 events. 3238/5522 cut-off events. For 442545/442548 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37851 event pairs, 661 based on Foata normal form. 3/5518 useless extension candidates. Maximal degree in co-relation 39081. Up to 4733 conditions per place. [2024-06-03 20:42:48,708 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 306 selfloop transitions, 182 changer transitions 0/495 dead transitions. [2024-06-03 20:42:48,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 495 transitions, 7754 flow [2024-06-03 20:42:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:42:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:42:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 322 transitions. [2024-06-03 20:42:48,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-03 20:42:48,710 INFO L175 Difference]: Start difference. First operand has 364 places, 462 transitions, 6352 flow. Second operand 15 states and 322 transitions. [2024-06-03 20:42:48,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 495 transitions, 7754 flow [2024-06-03 20:42:51,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 495 transitions, 7605 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:51,026 INFO L231 Difference]: Finished difference. Result has 375 places, 462 transitions, 6573 flow [2024-06-03 20:42:51,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6573, PETRI_PLACES=375, PETRI_TRANSITIONS=462} [2024-06-03 20:42:51,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-03 20:42:51,027 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 462 transitions, 6573 flow [2024-06-03 20:42:51,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:51,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:51,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:51,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:42:51,027 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:51,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash 708174122, now seen corresponding path program 9 times [2024-06-03 20:42:51,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:51,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799859701] [2024-06-03 20:42:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:51,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:51,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799859701] [2024-06-03 20:42:51,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799859701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:51,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:51,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:51,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954230500] [2024-06-03 20:42:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:51,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:51,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:51,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:51,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:51,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:51,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 462 transitions, 6573 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:51,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:51,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:51,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:52,350 INFO L124 PetriNetUnfolderBase]: 3235/5511 cut-off events. [2024-06-03 20:42:52,350 INFO L125 PetriNetUnfolderBase]: For 448864/448864 co-relation queries the response was YES. [2024-06-03 20:42:52,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39479 conditions, 5511 events. 3235/5511 cut-off events. For 448864/448864 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37771 event pairs, 657 based on Foata normal form. 1/5506 useless extension candidates. Maximal degree in co-relation 39322. Up to 4771 conditions per place. [2024-06-03 20:42:52,426 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 341 selfloop transitions, 139 changer transitions 0/487 dead transitions. [2024-06-03 20:42:52,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 487 transitions, 7595 flow [2024-06-03 20:42:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:42:52,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-03 20:42:52,428 INFO L175 Difference]: Start difference. First operand has 375 places, 462 transitions, 6573 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:42:52,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 487 transitions, 7595 flow [2024-06-03 20:42:54,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 487 transitions, 7225 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-03 20:42:54,284 INFO L231 Difference]: Finished difference. Result has 371 places, 462 transitions, 6491 flow [2024-06-03 20:42:54,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6491, PETRI_PLACES=371, PETRI_TRANSITIONS=462} [2024-06-03 20:42:54,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-03 20:42:54,284 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 462 transitions, 6491 flow [2024-06-03 20:42:54,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:54,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:54,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:54,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:42:54,285 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:54,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:54,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1737121890, now seen corresponding path program 1 times [2024-06-03 20:42:54,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:54,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932182711] [2024-06-03 20:42:54,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:54,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:54,529 INFO 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 20:42:54,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:54,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932182711] [2024-06-03 20:42:54,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932182711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:54,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:54,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:54,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767442430] [2024-06-03 20:42:54,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:54,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:54,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:54,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:54,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 462 transitions, 6491 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:54,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:54,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:54,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:55,517 INFO L124 PetriNetUnfolderBase]: 3263/5554 cut-off events. [2024-06-03 20:42:55,517 INFO L125 PetriNetUnfolderBase]: For 479242/479242 co-relation queries the response was YES. [2024-06-03 20:42:55,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39734 conditions, 5554 events. 3263/5554 cut-off events. For 479242/479242 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38128 event pairs, 566 based on Foata normal form. 6/5551 useless extension candidates. Maximal degree in co-relation 39576. Up to 4768 conditions per place. [2024-06-03 20:42:55,591 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 448 selfloop transitions, 33 changer transitions 0/488 dead transitions. [2024-06-03 20:42:55,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 488 transitions, 7796 flow [2024-06-03 20:42:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:42:55,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-03 20:42:55,593 INFO L175 Difference]: Start difference. First operand has 371 places, 462 transitions, 6491 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:42:55,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 488 transitions, 7796 flow [2024-06-03 20:42:57,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 488 transitions, 7429 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:42:57,243 INFO L231 Difference]: Finished difference. Result has 369 places, 465 transitions, 6240 flow [2024-06-03 20:42:57,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6240, PETRI_PLACES=369, PETRI_TRANSITIONS=465} [2024-06-03 20:42:57,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-03 20:42:57,244 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 465 transitions, 6240 flow [2024-06-03 20:42:57,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:57,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:57,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:57,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:42:57,245 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:57,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1676134228, now seen corresponding path program 2 times [2024-06-03 20:42:57,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:57,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179178186] [2024-06-03 20:42:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:57,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:57,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:57,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179178186] [2024-06-03 20:42:57,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179178186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:57,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:57,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:57,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202305495] [2024-06-03 20:42:57,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:57,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:57,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:57,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:57,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:57,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 465 transitions, 6240 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:42:57,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:57,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:57,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:58,459 INFO L124 PetriNetUnfolderBase]: 3250/5539 cut-off events. [2024-06-03 20:42:58,459 INFO L125 PetriNetUnfolderBase]: For 454431/454431 co-relation queries the response was YES. [2024-06-03 20:42:58,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38892 conditions, 5539 events. 3250/5539 cut-off events. For 454431/454431 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38026 event pairs, 557 based on Foata normal form. 6/5536 useless extension candidates. Maximal degree in co-relation 38733. Up to 4762 conditions per place. [2024-06-03 20:42:58,535 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 445 selfloop transitions, 33 changer transitions 0/485 dead transitions. [2024-06-03 20:42:58,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 485 transitions, 7316 flow [2024-06-03 20:42:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 20:42:58,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:42:58,536 INFO L175 Difference]: Start difference. First operand has 369 places, 465 transitions, 6240 flow. Second operand 5 states and 126 transitions. [2024-06-03 20:42:58,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 485 transitions, 7316 flow [2024-06-03 20:43:00,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 485 transitions, 7238 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:43:00,304 INFO L231 Difference]: Finished difference. Result has 371 places, 465 transitions, 6234 flow [2024-06-03 20:43:00,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6234, PETRI_PLACES=371, PETRI_TRANSITIONS=465} [2024-06-03 20:43:00,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-03 20:43:00,305 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 465 transitions, 6234 flow [2024-06-03 20:43:00,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:00,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:00,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:00,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:43:00,306 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:00,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash -778802518, now seen corresponding path program 1 times [2024-06-03 20:43:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:00,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966733180] [2024-06-03 20:43:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:00,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:00,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:00,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966733180] [2024-06-03 20:43:00,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966733180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:00,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:00,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:00,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904868717] [2024-06-03 20:43:00,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:00,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:00,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:00,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:00,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:00,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:00,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 465 transitions, 6234 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:00,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:00,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:00,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:01,630 INFO L124 PetriNetUnfolderBase]: 3343/5666 cut-off events. [2024-06-03 20:43:01,630 INFO L125 PetriNetUnfolderBase]: For 509652/509655 co-relation queries the response was YES. [2024-06-03 20:43:01,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41553 conditions, 5666 events. 3343/5666 cut-off events. For 509652/509655 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38831 event pairs, 678 based on Foata normal form. 2/5646 useless extension candidates. Maximal degree in co-relation 41394. Up to 4823 conditions per place. [2024-06-03 20:43:01,706 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 361 selfloop transitions, 138 changer transitions 0/506 dead transitions. [2024-06-03 20:43:01,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 506 transitions, 7755 flow [2024-06-03 20:43:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 20:43:01,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:43:01,707 INFO L175 Difference]: Start difference. First operand has 371 places, 465 transitions, 6234 flow. Second operand 8 states and 200 transitions. [2024-06-03 20:43:01,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 506 transitions, 7755 flow [2024-06-03 20:43:03,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 506 transitions, 7660 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:03,728 INFO L231 Difference]: Finished difference. Result has 375 places, 473 transitions, 6683 flow [2024-06-03 20:43:03,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6141, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6683, PETRI_PLACES=375, PETRI_TRANSITIONS=473} [2024-06-03 20:43:03,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-03 20:43:03,728 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 473 transitions, 6683 flow [2024-06-03 20:43:03,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:03,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:03,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:03,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:43:03,729 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:03,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash -13046502, now seen corresponding path program 2 times [2024-06-03 20:43:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:03,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608855912] [2024-06-03 20:43:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:03,966 INFO 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 20:43:03,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:03,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608855912] [2024-06-03 20:43:03,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608855912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:03,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:03,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:03,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486686725] [2024-06-03 20:43:03,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:03,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:03,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:03,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:04,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:04,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 473 transitions, 6683 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:04,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:04,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:04,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:04,979 INFO L124 PetriNetUnfolderBase]: 3338/5681 cut-off events. [2024-06-03 20:43:04,979 INFO L125 PetriNetUnfolderBase]: For 502479/502482 co-relation queries the response was YES. [2024-06-03 20:43:05,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41732 conditions, 5681 events. 3338/5681 cut-off events. For 502479/502482 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39042 event pairs, 701 based on Foata normal form. 2/5670 useless extension candidates. Maximal degree in co-relation 41572. Up to 4915 conditions per place. [2024-06-03 20:43:05,055 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 131 changer transitions 0/498 dead transitions. [2024-06-03 20:43:05,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 498 transitions, 7727 flow [2024-06-03 20:43:05,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:05,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:43:05,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:43:05,056 INFO L175 Difference]: Start difference. First operand has 375 places, 473 transitions, 6683 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:43:05,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 498 transitions, 7727 flow [2024-06-03 20:43:07,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 498 transitions, 7426 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:07,300 INFO L231 Difference]: Finished difference. Result has 378 places, 473 transitions, 6649 flow [2024-06-03 20:43:07,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6382, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6649, PETRI_PLACES=378, PETRI_TRANSITIONS=473} [2024-06-03 20:43:07,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-03 20:43:07,301 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 473 transitions, 6649 flow [2024-06-03 20:43:07,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:07,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:07,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:07,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:43:07,302 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:07,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:07,302 INFO L85 PathProgramCache]: Analyzing trace with hash -8577852, now seen corresponding path program 3 times [2024-06-03 20:43:07,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:07,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822175271] [2024-06-03 20:43:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:07,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:07,544 INFO 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 20:43:07,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:07,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822175271] [2024-06-03 20:43:07,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822175271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:07,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:07,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:07,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510905935] [2024-06-03 20:43:07,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:07,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:07,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:07,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:07,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:07,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:07,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 473 transitions, 6649 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:07,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:07,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:07,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:08,755 INFO L124 PetriNetUnfolderBase]: 3333/5670 cut-off events. [2024-06-03 20:43:08,756 INFO L125 PetriNetUnfolderBase]: For 503718/503721 co-relation queries the response was YES. [2024-06-03 20:43:08,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41452 conditions, 5670 events. 3333/5670 cut-off events. For 503718/503721 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38927 event pairs, 673 based on Foata normal form. 4/5665 useless extension candidates. Maximal degree in co-relation 41291. Up to 5064 conditions per place. [2024-06-03 20:43:08,825 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 424 selfloop transitions, 64 changer transitions 0/495 dead transitions. [2024-06-03 20:43:08,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 495 transitions, 7679 flow [2024-06-03 20:43:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 20:43:08,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-03 20:43:08,826 INFO L175 Difference]: Start difference. First operand has 378 places, 473 transitions, 6649 flow. Second operand 8 states and 185 transitions. [2024-06-03 20:43:08,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 495 transitions, 7679 flow [2024-06-03 20:43:11,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 495 transitions, 7380 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:11,127 INFO L231 Difference]: Finished difference. Result has 380 places, 473 transitions, 6483 flow [2024-06-03 20:43:11,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6483, PETRI_PLACES=380, PETRI_TRANSITIONS=473} [2024-06-03 20:43:11,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-03 20:43:11,127 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 473 transitions, 6483 flow [2024-06-03 20:43:11,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:11,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:11,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:11,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:43:11,128 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:11,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:11,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1583878972, now seen corresponding path program 4 times [2024-06-03 20:43:11,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:11,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436103667] [2024-06-03 20:43:11,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:11,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:11,369 INFO 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 20:43:11,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:11,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436103667] [2024-06-03 20:43:11,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436103667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:11,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:11,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:11,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114363828] [2024-06-03 20:43:11,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:11,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:11,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:11,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:11,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:11,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:11,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 473 transitions, 6483 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:11,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:11,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:11,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:12,428 INFO L124 PetriNetUnfolderBase]: 3341/5678 cut-off events. [2024-06-03 20:43:12,429 INFO L125 PetriNetUnfolderBase]: For 513948/513951 co-relation queries the response was YES. [2024-06-03 20:43:12,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41453 conditions, 5678 events. 3341/5678 cut-off events. For 513948/513951 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 38897 event pairs, 671 based on Foata normal form. 4/5673 useless extension candidates. Maximal degree in co-relation 41291. Up to 5070 conditions per place. [2024-06-03 20:43:12,506 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 70 changer transitions 0/495 dead transitions. [2024-06-03 20:43:12,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 495 transitions, 7576 flow [2024-06-03 20:43:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:12,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:12,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 20:43:12,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-03 20:43:12,507 INFO L175 Difference]: Start difference. First operand has 380 places, 473 transitions, 6483 flow. Second operand 9 states and 199 transitions. [2024-06-03 20:43:12,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 495 transitions, 7576 flow [2024-06-03 20:43:15,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 495 transitions, 7407 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:15,053 INFO L231 Difference]: Finished difference. Result has 383 places, 475 transitions, 6532 flow [2024-06-03 20:43:15,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6314, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6532, PETRI_PLACES=383, PETRI_TRANSITIONS=475} [2024-06-03 20:43:15,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-03 20:43:15,053 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 475 transitions, 6532 flow [2024-06-03 20:43:15,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:15,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:15,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:15,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:43:15,054 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:15,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2072429038, now seen corresponding path program 13 times [2024-06-03 20:43:15,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:15,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589345225] [2024-06-03 20:43:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:15,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:15,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:15,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589345225] [2024-06-03 20:43:15,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589345225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:15,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:15,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:15,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451155358] [2024-06-03 20:43:15,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:15,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:15,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:15,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:15,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:15,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 475 transitions, 6532 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:15,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:15,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:15,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:16,407 INFO L124 PetriNetUnfolderBase]: 3394/5760 cut-off events. [2024-06-03 20:43:16,407 INFO L125 PetriNetUnfolderBase]: For 546717/546717 co-relation queries the response was YES. [2024-06-03 20:43:16,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42669 conditions, 5760 events. 3394/5760 cut-off events. For 546717/546717 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39576 event pairs, 671 based on Foata normal form. 1/5755 useless extension candidates. Maximal degree in co-relation 42506. Up to 4709 conditions per place. [2024-06-03 20:43:16,487 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 210 changer transitions 0/532 dead transitions. [2024-06-03 20:43:16,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 532 transitions, 8723 flow [2024-06-03 20:43:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:43:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:43:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 268 transitions. [2024-06-03 20:43:16,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5800865800865801 [2024-06-03 20:43:16,488 INFO L175 Difference]: Start difference. First operand has 383 places, 475 transitions, 6532 flow. Second operand 11 states and 268 transitions. [2024-06-03 20:43:16,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 532 transitions, 8723 flow [2024-06-03 20:43:18,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 532 transitions, 8532 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:18,983 INFO L231 Difference]: Finished difference. Result has 388 places, 492 transitions, 7147 flow [2024-06-03 20:43:18,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7147, PETRI_PLACES=388, PETRI_TRANSITIONS=492} [2024-06-03 20:43:18,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-03 20:43:18,984 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 492 transitions, 7147 flow [2024-06-03 20:43:18,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:18,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:18,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:18,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:43:18,985 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:18,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:18,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1741550016, now seen corresponding path program 14 times [2024-06-03 20:43:18,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:18,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192491801] [2024-06-03 20:43:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:19,219 INFO 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 20:43:19,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:19,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192491801] [2024-06-03 20:43:19,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192491801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:19,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:19,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:19,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172834673] [2024-06-03 20:43:19,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:19,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:19,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:19,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:19,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:19,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 492 transitions, 7147 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:19,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:19,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:19,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:20,391 INFO L124 PetriNetUnfolderBase]: 3407/5782 cut-off events. [2024-06-03 20:43:20,391 INFO L125 PetriNetUnfolderBase]: For 563858/563858 co-relation queries the response was YES. [2024-06-03 20:43:20,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43554 conditions, 5782 events. 3407/5782 cut-off events. For 563858/563858 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39791 event pairs, 669 based on Foata normal form. 1/5777 useless extension candidates. Maximal degree in co-relation 43389. Up to 4598 conditions per place. [2024-06-03 20:43:20,470 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 278 selfloop transitions, 258 changer transitions 0/543 dead transitions. [2024-06-03 20:43:20,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 543 transitions, 9221 flow [2024-06-03 20:43:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:43:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:43:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 307 transitions. [2024-06-03 20:43:20,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622710622710623 [2024-06-03 20:43:20,471 INFO L175 Difference]: Start difference. First operand has 388 places, 492 transitions, 7147 flow. Second operand 13 states and 307 transitions. [2024-06-03 20:43:20,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 543 transitions, 9221 flow [2024-06-03 20:43:22,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 543 transitions, 8642 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:22,913 INFO L231 Difference]: Finished difference. Result has 394 places, 498 transitions, 7230 flow [2024-06-03 20:43:22,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6612, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7230, PETRI_PLACES=394, PETRI_TRANSITIONS=498} [2024-06-03 20:43:22,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-03 20:43:22,914 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 498 transitions, 7230 flow [2024-06-03 20:43:22,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:22,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:22,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:22,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:43:22,914 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:22,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1875469550, now seen corresponding path program 15 times [2024-06-03 20:43:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969748986] [2024-06-03 20:43:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:23,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:23,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969748986] [2024-06-03 20:43:23,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969748986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:23,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:23,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:23,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65327537] [2024-06-03 20:43:23,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:23,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:23,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:23,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:23,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 498 transitions, 7230 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:23,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:23,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:23,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:24,319 INFO L124 PetriNetUnfolderBase]: 3404/5786 cut-off events. [2024-06-03 20:43:24,320 INFO L125 PetriNetUnfolderBase]: For 568271/568271 co-relation queries the response was YES. [2024-06-03 20:43:24,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43462 conditions, 5786 events. 3404/5786 cut-off events. For 568271/568271 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39898 event pairs, 677 based on Foata normal form. 1/5781 useless extension candidates. Maximal degree in co-relation 43296. Up to 4596 conditions per place. [2024-06-03 20:43:24,400 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 252 changer transitions 0/536 dead transitions. [2024-06-03 20:43:24,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 536 transitions, 8952 flow [2024-06-03 20:43:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:43:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:43:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-03 20:43:24,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880952380952381 [2024-06-03 20:43:24,402 INFO L175 Difference]: Start difference. First operand has 394 places, 498 transitions, 7230 flow. Second operand 10 states and 247 transitions. [2024-06-03 20:43:24,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 536 transitions, 8952 flow [2024-06-03 20:43:26,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 536 transitions, 8519 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-03 20:43:26,811 INFO L231 Difference]: Finished difference. Result has 396 places, 498 transitions, 7307 flow [2024-06-03 20:43:26,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7307, PETRI_PLACES=396, PETRI_TRANSITIONS=498} [2024-06-03 20:43:26,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-03 20:43:26,812 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 498 transitions, 7307 flow [2024-06-03 20:43:26,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:26,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:26,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:26,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:43:26,812 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:26,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:26,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1875589520, now seen corresponding path program 16 times [2024-06-03 20:43:26,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:26,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671628042] [2024-06-03 20:43:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:26,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:27,068 INFO 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 20:43:27,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:27,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671628042] [2024-06-03 20:43:27,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671628042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:27,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:27,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:27,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196501131] [2024-06-03 20:43:27,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:27,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:27,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 498 transitions, 7307 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:27,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:27,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:27,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:28,245 INFO L124 PetriNetUnfolderBase]: 3409/5787 cut-off events. [2024-06-03 20:43:28,246 INFO L125 PetriNetUnfolderBase]: For 580574/580574 co-relation queries the response was YES. [2024-06-03 20:43:28,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43676 conditions, 5787 events. 3409/5787 cut-off events. For 580574/580574 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 39809 event pairs, 671 based on Foata normal form. 1/5782 useless extension candidates. Maximal degree in co-relation 43509. Up to 5024 conditions per place. [2024-06-03 20:43:28,325 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 392 selfloop transitions, 134 changer transitions 0/533 dead transitions. [2024-06-03 20:43:28,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 533 transitions, 8496 flow [2024-06-03 20:43:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:43:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:43:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-03 20:43:28,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:43:28,327 INFO L175 Difference]: Start difference. First operand has 396 places, 498 transitions, 7307 flow. Second operand 10 states and 235 transitions. [2024-06-03 20:43:28,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 533 transitions, 8496 flow [2024-06-03 20:43:30,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 533 transitions, 7980 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:43:30,827 INFO L231 Difference]: Finished difference. Result has 397 places, 501 transitions, 7128 flow [2024-06-03 20:43:30,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7128, PETRI_PLACES=397, PETRI_TRANSITIONS=501} [2024-06-03 20:43:30,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-03 20:43:30,828 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 501 transitions, 7128 flow [2024-06-03 20:43:30,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:30,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:30,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:30,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:43:30,829 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:30,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1884843950, now seen corresponding path program 17 times [2024-06-03 20:43:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:30,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123948409] [2024-06-03 20:43:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:30,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:31,075 INFO 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 20:43:31,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:31,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123948409] [2024-06-03 20:43:31,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123948409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:31,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:31,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:31,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129855606] [2024-06-03 20:43:31,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:31,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:31,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:31,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:31,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 501 transitions, 7128 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:31,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:31,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:31,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:32,271 INFO L124 PetriNetUnfolderBase]: 3406/5799 cut-off events. [2024-06-03 20:43:32,271 INFO L125 PetriNetUnfolderBase]: For 584277/584277 co-relation queries the response was YES. [2024-06-03 20:43:32,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43304 conditions, 5799 events. 3406/5799 cut-off events. For 584277/584277 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40027 event pairs, 683 based on Foata normal form. 1/5794 useless extension candidates. Maximal degree in co-relation 43136. Up to 5010 conditions per place. [2024-06-03 20:43:32,353 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 144 changer transitions 0/538 dead transitions. [2024-06-03 20:43:32,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 538 transitions, 8474 flow [2024-06-03 20:43:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:43:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:43:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 309 transitions. [2024-06-03 20:43:32,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-06-03 20:43:32,354 INFO L175 Difference]: Start difference. First operand has 397 places, 501 transitions, 7128 flow. Second operand 14 states and 309 transitions. [2024-06-03 20:43:32,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 538 transitions, 8474 flow [2024-06-03 20:43:35,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 538 transitions, 8182 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 20:43:35,187 INFO L231 Difference]: Finished difference. Result has 403 places, 501 transitions, 7130 flow [2024-06-03 20:43:35,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6836, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7130, PETRI_PLACES=403, PETRI_TRANSITIONS=501} [2024-06-03 20:43:35,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-03 20:43:35,188 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 501 transitions, 7130 flow [2024-06-03 20:43:35,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:35,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:35,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:35,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:43:35,188 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:35,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:35,189 INFO L85 PathProgramCache]: Analyzing trace with hash 244618612, now seen corresponding path program 18 times [2024-06-03 20:43:35,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:35,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016531254] [2024-06-03 20:43:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:35,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:35,439 INFO 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 20:43:35,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:35,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016531254] [2024-06-03 20:43:35,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016531254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:35,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:35,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:35,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616157695] [2024-06-03 20:43:35,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:35,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:35,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:35,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:35,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:35,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 501 transitions, 7130 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:35,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:35,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:35,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:36,593 INFO L124 PetriNetUnfolderBase]: 3403/5795 cut-off events. [2024-06-03 20:43:36,593 INFO L125 PetriNetUnfolderBase]: For 590391/590391 co-relation queries the response was YES. [2024-06-03 20:43:36,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43296 conditions, 5795 events. 3403/5795 cut-off events. For 590391/590391 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40027 event pairs, 683 based on Foata normal form. 1/5790 useless extension candidates. Maximal degree in co-relation 43127. Up to 5007 conditions per place. [2024-06-03 20:43:36,675 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 384 selfloop transitions, 144 changer transitions 0/535 dead transitions. [2024-06-03 20:43:36,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 535 transitions, 8270 flow [2024-06-03 20:43:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:43:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:43:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 272 transitions. [2024-06-03 20:43:36,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-03 20:43:36,676 INFO L175 Difference]: Start difference. First operand has 403 places, 501 transitions, 7130 flow. Second operand 12 states and 272 transitions. [2024-06-03 20:43:36,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 535 transitions, 8270 flow [2024-06-03 20:43:39,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 535 transitions, 7876 flow, removed 25 selfloop flow, removed 12 redundant places. [2024-06-03 20:43:39,735 INFO L231 Difference]: Finished difference. Result has 403 places, 501 transitions, 7030 flow [2024-06-03 20:43:39,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7030, PETRI_PLACES=403, PETRI_TRANSITIONS=501} [2024-06-03 20:43:39,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-03 20:43:39,736 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 501 transitions, 7030 flow [2024-06-03 20:43:39,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:39,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:39,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:39,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:43:39,736 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:39,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1451136080, now seen corresponding path program 19 times [2024-06-03 20:43:39,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:39,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320101372] [2024-06-03 20:43:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:39,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:39,970 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 20:43:39,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320101372] [2024-06-03 20:43:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320101372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:39,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:39,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:39,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130529345] [2024-06-03 20:43:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:39,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:39,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:39,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:39,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:40,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:40,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 501 transitions, 7030 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:40,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:40,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:40,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:41,167 INFO L124 PetriNetUnfolderBase]: 3408/5788 cut-off events. [2024-06-03 20:43:41,168 INFO L125 PetriNetUnfolderBase]: For 601927/601927 co-relation queries the response was YES. [2024-06-03 20:43:41,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43383 conditions, 5788 events. 3408/5788 cut-off events. For 601927/601927 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 39889 event pairs, 669 based on Foata normal form. 1/5783 useless extension candidates. Maximal degree in co-relation 43213. Up to 4600 conditions per place. [2024-06-03 20:43:41,246 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 266 changer transitions 0/545 dead transitions. [2024-06-03 20:43:41,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 545 transitions, 8651 flow [2024-06-03 20:43:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:43:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:43:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-03 20:43:41,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-03 20:43:41,248 INFO L175 Difference]: Start difference. First operand has 403 places, 501 transitions, 7030 flow. Second operand 11 states and 266 transitions. [2024-06-03 20:43:41,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 545 transitions, 8651 flow [2024-06-03 20:43:43,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 545 transitions, 8363 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 20:43:43,982 INFO L231 Difference]: Finished difference. Result has 403 places, 504 transitions, 7327 flow [2024-06-03 20:43:43,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6742, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7327, PETRI_PLACES=403, PETRI_TRANSITIONS=504} [2024-06-03 20:43:43,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-03 20:43:43,982 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 504 transitions, 7327 flow [2024-06-03 20:43:43,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:43,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:43,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:43,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:43:43,983 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:43,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:43,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1803004690, now seen corresponding path program 20 times [2024-06-03 20:43:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:43,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29407366] [2024-06-03 20:43:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:43,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:44,211 INFO 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 20:43:44,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29407366] [2024-06-03 20:43:44,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29407366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:44,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:44,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:44,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842512662] [2024-06-03 20:43:44,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:44,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:44,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:44,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:44,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:44,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:44,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 504 transitions, 7327 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:44,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:44,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:44,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:45,357 INFO L124 PetriNetUnfolderBase]: 3413/5797 cut-off events. [2024-06-03 20:43:45,357 INFO L125 PetriNetUnfolderBase]: For 614781/614781 co-relation queries the response was YES. [2024-06-03 20:43:45,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43976 conditions, 5797 events. 3413/5797 cut-off events. For 614781/614781 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39979 event pairs, 669 based on Foata normal form. 1/5792 useless extension candidates. Maximal degree in co-relation 43805. Up to 4604 conditions per place. [2024-06-03 20:43:45,436 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 270 changer transitions 0/550 dead transitions. [2024-06-03 20:43:45,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 550 transitions, 8972 flow [2024-06-03 20:43:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:43:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:43:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 302 transitions. [2024-06-03 20:43:45,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531135531135531 [2024-06-03 20:43:45,438 INFO L175 Difference]: Start difference. First operand has 403 places, 504 transitions, 7327 flow. Second operand 13 states and 302 transitions. [2024-06-03 20:43:45,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 550 transitions, 8972 flow [2024-06-03 20:43:48,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 550 transitions, 8478 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-03 20:43:48,209 INFO L231 Difference]: Finished difference. Result has 408 places, 507 transitions, 7432 flow [2024-06-03 20:43:48,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6842, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7432, PETRI_PLACES=408, PETRI_TRANSITIONS=507} [2024-06-03 20:43:48,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-03 20:43:48,209 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 507 transitions, 7432 flow [2024-06-03 20:43:48,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:48,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:48,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:48,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:43:48,210 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:48,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:48,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1513434326, now seen corresponding path program 21 times [2024-06-03 20:43:48,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:48,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470984834] [2024-06-03 20:43:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:48,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:48,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:48,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470984834] [2024-06-03 20:43:48,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470984834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:48,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:48,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:48,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125604338] [2024-06-03 20:43:48,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:48,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:48,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:48,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:48,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:48,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 507 transitions, 7432 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:48,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:48,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:48,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:49,616 INFO L124 PetriNetUnfolderBase]: 3439/5853 cut-off events. [2024-06-03 20:43:49,617 INFO L125 PetriNetUnfolderBase]: For 641056/641056 co-relation queries the response was YES. [2024-06-03 20:43:49,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44598 conditions, 5853 events. 3439/5853 cut-off events. For 641056/641056 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 40509 event pairs, 680 based on Foata normal form. 2/5849 useless extension candidates. Maximal degree in co-relation 44426. Up to 4632 conditions per place. [2024-06-03 20:43:49,698 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 274 changer transitions 0/553 dead transitions. [2024-06-03 20:43:49,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 553 transitions, 9158 flow [2024-06-03 20:43:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:43:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:43:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 279 transitions. [2024-06-03 20:43:49,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 20:43:49,699 INFO L175 Difference]: Start difference. First operand has 408 places, 507 transitions, 7432 flow. Second operand 12 states and 279 transitions. [2024-06-03 20:43:49,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 553 transitions, 9158 flow [2024-06-03 20:43:52,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 553 transitions, 8572 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-03 20:43:52,507 INFO L231 Difference]: Finished difference. Result has 409 places, 517 transitions, 7545 flow [2024-06-03 20:43:52,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6866, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7545, PETRI_PLACES=409, PETRI_TRANSITIONS=517} [2024-06-03 20:43:52,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-03 20:43:52,508 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 517 transitions, 7545 flow [2024-06-03 20:43:52,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:52,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:52,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:52,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:43:52,508 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:52,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:52,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1650697134, now seen corresponding path program 22 times [2024-06-03 20:43:52,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:52,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432158977] [2024-06-03 20:43:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:52,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:52,785 INFO 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 20:43:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:52,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432158977] [2024-06-03 20:43:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432158977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:52,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:52,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:52,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536350925] [2024-06-03 20:43:52,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:52,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:52,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:52,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:52,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 517 transitions, 7545 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:52,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:52,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:52,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:54,046 INFO L124 PetriNetUnfolderBase]: 3497/5933 cut-off events. [2024-06-03 20:43:54,046 INFO L125 PetriNetUnfolderBase]: For 686106/686106 co-relation queries the response was YES. [2024-06-03 20:43:54,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45851 conditions, 5933 events. 3497/5933 cut-off events. For 686106/686106 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41041 event pairs, 669 based on Foata normal form. 2/5929 useless extension candidates. Maximal degree in co-relation 45678. Up to 5027 conditions per place. [2024-06-03 20:43:54,127 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 385 selfloop transitions, 176 changer transitions 0/568 dead transitions. [2024-06-03 20:43:54,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 568 transitions, 9635 flow [2024-06-03 20:43:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:43:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:43:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 313 transitions. [2024-06-03 20:43:54,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532312925170068 [2024-06-03 20:43:54,129 INFO L175 Difference]: Start difference. First operand has 409 places, 517 transitions, 7545 flow. Second operand 14 states and 313 transitions. [2024-06-03 20:43:54,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 568 transitions, 9635 flow [2024-06-03 20:43:57,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 568 transitions, 9188 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 20:43:57,757 INFO L231 Difference]: Finished difference. Result has 418 places, 535 transitions, 7839 flow [2024-06-03 20:43:57,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7113, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7839, PETRI_PLACES=418, PETRI_TRANSITIONS=535} [2024-06-03 20:43:57,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-03 20:43:57,757 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 535 transitions, 7839 flow [2024-06-03 20:43:57,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:57,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:57,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:57,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:43:57,758 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:57,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:57,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1650489744, now seen corresponding path program 23 times [2024-06-03 20:43:57,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:57,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865684011] [2024-06-03 20:43:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:57,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:57,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:57,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865684011] [2024-06-03 20:43:57,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865684011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:57,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:57,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:57,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961868891] [2024-06-03 20:43:57,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:57,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:57,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:57,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:58,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:58,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 535 transitions, 7839 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:43:58,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:58,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:58,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:59,201 INFO L124 PetriNetUnfolderBase]: 3491/5929 cut-off events. [2024-06-03 20:43:59,202 INFO L125 PetriNetUnfolderBase]: For 687967/687967 co-relation queries the response was YES. [2024-06-03 20:43:59,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45642 conditions, 5929 events. 3491/5929 cut-off events. For 687967/687967 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40965 event pairs, 671 based on Foata normal form. 2/5925 useless extension candidates. Maximal degree in co-relation 45465. Up to 5022 conditions per place. [2024-06-03 20:43:59,287 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 383 selfloop transitions, 177 changer transitions 0/567 dead transitions. [2024-06-03 20:43:59,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 567 transitions, 9447 flow [2024-06-03 20:43:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:43:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:43:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 310 transitions. [2024-06-03 20:43:59,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-03 20:43:59,288 INFO L175 Difference]: Start difference. First operand has 418 places, 535 transitions, 7839 flow. Second operand 14 states and 310 transitions. [2024-06-03 20:43:59,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 567 transitions, 9447 flow [2024-06-03 20:44:02,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 567 transitions, 9059 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-03 20:44:02,380 INFO L231 Difference]: Finished difference. Result has 422 places, 535 transitions, 7812 flow [2024-06-03 20:44:02,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7451, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7812, PETRI_PLACES=422, PETRI_TRANSITIONS=535} [2024-06-03 20:44:02,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-03 20:44:02,381 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 535 transitions, 7812 flow [2024-06-03 20:44:02,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:02,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:02,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:02,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:44:02,382 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:02,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:02,382 INFO L85 PathProgramCache]: Analyzing trace with hash -354243312, now seen corresponding path program 24 times [2024-06-03 20:44:02,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:02,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387214715] [2024-06-03 20:44:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:02,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:02,640 INFO 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 20:44:02,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:02,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387214715] [2024-06-03 20:44:02,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387214715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:02,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:02,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:02,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964561962] [2024-06-03 20:44:02,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:02,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:02,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:02,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:02,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 535 transitions, 7812 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:02,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:02,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:02,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:03,891 INFO L124 PetriNetUnfolderBase]: 3485/5925 cut-off events. [2024-06-03 20:44:03,891 INFO L125 PetriNetUnfolderBase]: For 688765/688765 co-relation queries the response was YES. [2024-06-03 20:44:03,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45442 conditions, 5925 events. 3485/5925 cut-off events. For 688765/688765 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41064 event pairs, 673 based on Foata normal form. 2/5921 useless extension candidates. Maximal degree in co-relation 45264. Up to 5017 conditions per place. [2024-06-03 20:44:03,976 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 169 changer transitions 0/563 dead transitions. [2024-06-03 20:44:03,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 563 transitions, 9200 flow [2024-06-03 20:44:03,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:44:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:44:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-03 20:44:03,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-03 20:44:03,978 INFO L175 Difference]: Start difference. First operand has 422 places, 535 transitions, 7812 flow. Second operand 11 states and 252 transitions. [2024-06-03 20:44:03,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 563 transitions, 9200 flow [2024-06-03 20:44:07,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 563 transitions, 8825 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-03 20:44:07,156 INFO L231 Difference]: Finished difference. Result has 421 places, 535 transitions, 7782 flow [2024-06-03 20:44:07,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7437, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7782, PETRI_PLACES=421, PETRI_TRANSITIONS=535} [2024-06-03 20:44:07,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-03 20:44:07,156 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 535 transitions, 7782 flow [2024-06-03 20:44:07,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:07,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:07,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:07,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:44:07,157 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:07,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:07,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1498567846, now seen corresponding path program 25 times [2024-06-03 20:44:07,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:07,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335211704] [2024-06-03 20:44:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:07,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:07,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:07,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335211704] [2024-06-03 20:44:07,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335211704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:07,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:07,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:07,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218596316] [2024-06-03 20:44:07,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:07,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:07,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:07,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:07,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:07,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:07,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 535 transitions, 7782 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:07,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:07,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:07,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:08,676 INFO L124 PetriNetUnfolderBase]: 3479/5920 cut-off events. [2024-06-03 20:44:08,676 INFO L125 PetriNetUnfolderBase]: For 689939/689942 co-relation queries the response was YES. [2024-06-03 20:44:08,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45253 conditions, 5920 events. 3479/5920 cut-off events. For 689939/689942 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41046 event pairs, 675 based on Foata normal form. 4/5917 useless extension candidates. Maximal degree in co-relation 45074. Up to 4764 conditions per place. [2024-06-03 20:44:08,762 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 289 selfloop transitions, 297 changer transitions 0/593 dead transitions. [2024-06-03 20:44:08,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 593 transitions, 9938 flow [2024-06-03 20:44:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:44:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:44:08,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 346 transitions. [2024-06-03 20:44:08,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 20:44:08,763 INFO L175 Difference]: Start difference. First operand has 421 places, 535 transitions, 7782 flow. Second operand 14 states and 346 transitions. [2024-06-03 20:44:08,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 593 transitions, 9938 flow [2024-06-03 20:44:12,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 593 transitions, 9561 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-03 20:44:12,145 INFO L231 Difference]: Finished difference. Result has 424 places, 535 transitions, 8022 flow [2024-06-03 20:44:12,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7405, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8022, PETRI_PLACES=424, PETRI_TRANSITIONS=535} [2024-06-03 20:44:12,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-03 20:44:12,150 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 535 transitions, 8022 flow [2024-06-03 20:44:12,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:12,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:12,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:12,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:44:12,151 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:12,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:12,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1740402060, now seen corresponding path program 26 times [2024-06-03 20:44:12,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:12,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443616500] [2024-06-03 20:44:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:12,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:12,398 INFO 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 20:44:12,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:12,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443616500] [2024-06-03 20:44:12,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443616500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:12,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:12,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:12,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962008880] [2024-06-03 20:44:12,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:12,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:12,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:12,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:12,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 535 transitions, 8022 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:12,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:12,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:12,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:13,823 INFO L124 PetriNetUnfolderBase]: 3473/5905 cut-off events. [2024-06-03 20:44:13,823 INFO L125 PetriNetUnfolderBase]: For 692004/692004 co-relation queries the response was YES. [2024-06-03 20:44:13,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45479 conditions, 5905 events. 3473/5905 cut-off events. For 692004/692004 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40927 event pairs, 671 based on Foata normal form. 2/5901 useless extension candidates. Maximal degree in co-relation 45299. Up to 4759 conditions per place. [2024-06-03 20:44:13,900 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 268 changer transitions 0/584 dead transitions. [2024-06-03 20:44:13,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 584 transitions, 9934 flow [2024-06-03 20:44:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:44:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:44:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 298 transitions. [2024-06-03 20:44:13,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:44:13,901 INFO L175 Difference]: Start difference. First operand has 424 places, 535 transitions, 8022 flow. Second operand 12 states and 298 transitions. [2024-06-03 20:44:13,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 584 transitions, 9934 flow [2024-06-03 20:44:17,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 584 transitions, 9452 flow, removed 32 selfloop flow, removed 13 redundant places. [2024-06-03 20:44:17,233 INFO L231 Difference]: Finished difference. Result has 423 places, 535 transitions, 8120 flow [2024-06-03 20:44:17,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7564, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8120, PETRI_PLACES=423, PETRI_TRANSITIONS=535} [2024-06-03 20:44:17,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-03 20:44:17,233 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 535 transitions, 8120 flow [2024-06-03 20:44:17,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:17,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:17,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:17,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:44:17,234 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:17,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash 423810898, now seen corresponding path program 27 times [2024-06-03 20:44:17,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:17,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682366401] [2024-06-03 20:44:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:17,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:17,470 INFO 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 20:44:17,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:17,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682366401] [2024-06-03 20:44:17,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682366401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:17,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:17,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:17,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478379006] [2024-06-03 20:44:17,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:17,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:17,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:17,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:17,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:17,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:17,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 535 transitions, 8120 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:17,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:17,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:17,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:18,687 INFO L124 PetriNetUnfolderBase]: 3467/5909 cut-off events. [2024-06-03 20:44:18,688 INFO L125 PetriNetUnfolderBase]: For 646580/646580 co-relation queries the response was YES. [2024-06-03 20:44:18,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44978 conditions, 5909 events. 3467/5909 cut-off events. For 646580/646580 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41051 event pairs, 681 based on Foata normal form. 2/5905 useless extension candidates. Maximal degree in co-relation 44800. Up to 4754 conditions per place. [2024-06-03 20:44:18,775 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 244 changer transitions 0/570 dead transitions. [2024-06-03 20:44:18,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 570 transitions, 9540 flow [2024-06-03 20:44:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:44:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:44:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-03 20:44:18,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:44:18,777 INFO L175 Difference]: Start difference. First operand has 423 places, 535 transitions, 8120 flow. Second operand 9 states and 225 transitions. [2024-06-03 20:44:18,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 570 transitions, 9540 flow [2024-06-03 20:44:21,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 570 transitions, 8854 flow, removed 22 selfloop flow, removed 15 redundant places. [2024-06-03 20:44:21,913 INFO L231 Difference]: Finished difference. Result has 417 places, 535 transitions, 7944 flow [2024-06-03 20:44:21,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7944, PETRI_PLACES=417, PETRI_TRANSITIONS=535} [2024-06-03 20:44:21,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-03 20:44:21,914 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 535 transitions, 7944 flow [2024-06-03 20:44:21,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:21,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:21,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:21,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:44:21,914 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:21,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:21,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1754427988, now seen corresponding path program 28 times [2024-06-03 20:44:21,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:21,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528449671] [2024-06-03 20:44:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:21,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:22,156 INFO 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 20:44:22,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:22,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528449671] [2024-06-03 20:44:22,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528449671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:22,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:22,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:22,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254320812] [2024-06-03 20:44:22,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:22,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:22,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:22,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:22,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:22,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:22,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 535 transitions, 7944 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:22,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:22,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:22,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:23,360 INFO L124 PetriNetUnfolderBase]: 3461/5892 cut-off events. [2024-06-03 20:44:23,361 INFO L125 PetriNetUnfolderBase]: For 613411/613414 co-relation queries the response was YES. [2024-06-03 20:44:23,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44331 conditions, 5892 events. 3461/5892 cut-off events. For 613411/613414 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40813 event pairs, 673 based on Foata normal form. 4/5889 useless extension candidates. Maximal degree in co-relation 44155. Up to 4749 conditions per place. [2024-06-03 20:44:23,447 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 297 changer transitions 0/584 dead transitions. [2024-06-03 20:44:23,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 584 transitions, 9826 flow [2024-06-03 20:44:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:44:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:44:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 299 transitions. [2024-06-03 20:44:23,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5932539682539683 [2024-06-03 20:44:23,448 INFO L175 Difference]: Start difference. First operand has 417 places, 535 transitions, 7944 flow. Second operand 12 states and 299 transitions. [2024-06-03 20:44:23,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 584 transitions, 9826 flow [2024-06-03 20:44:26,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 584 transitions, 9257 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-03 20:44:26,410 INFO L231 Difference]: Finished difference. Result has 418 places, 535 transitions, 8000 flow [2024-06-03 20:44:26,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8000, PETRI_PLACES=418, PETRI_TRANSITIONS=535} [2024-06-03 20:44:26,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-03 20:44:26,411 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 535 transitions, 8000 flow [2024-06-03 20:44:26,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:26,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:26,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:44:26,411 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:26,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1350958246, now seen corresponding path program 29 times [2024-06-03 20:44:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:26,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976594716] [2024-06-03 20:44:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:26,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:26,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976594716] [2024-06-03 20:44:26,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976594716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:26,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:26,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:26,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818189515] [2024-06-03 20:44:26,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:26,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:26,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:26,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:26,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:26,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:26,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 535 transitions, 8000 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:26,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:26,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:26,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:28,011 INFO L124 PetriNetUnfolderBase]: 3455/5884 cut-off events. [2024-06-03 20:44:28,011 INFO L125 PetriNetUnfolderBase]: For 591425/591425 co-relation queries the response was YES. [2024-06-03 20:44:28,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44018 conditions, 5884 events. 3455/5884 cut-off events. For 591425/591425 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40784 event pairs, 662 based on Foata normal form. 2/5881 useless extension candidates. Maximal degree in co-relation 43843. Up to 5219 conditions per place. [2024-06-03 20:44:28,088 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 475 selfloop transitions, 75 changer transitions 0/557 dead transitions. [2024-06-03 20:44:28,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 557 transitions, 9156 flow [2024-06-03 20:44:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:44:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:44:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 20:44:28,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:44:28,089 INFO L175 Difference]: Start difference. First operand has 418 places, 535 transitions, 8000 flow. Second operand 6 states and 156 transitions. [2024-06-03 20:44:28,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 557 transitions, 9156 flow [2024-06-03 20:44:30,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 557 transitions, 8532 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-03 20:44:30,629 INFO L231 Difference]: Finished difference. Result has 412 places, 535 transitions, 7558 flow [2024-06-03 20:44:30,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7376, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7558, PETRI_PLACES=412, PETRI_TRANSITIONS=535} [2024-06-03 20:44:30,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-03 20:44:30,630 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 535 transitions, 7558 flow [2024-06-03 20:44:30,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:30,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:30,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:30,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:44:30,630 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:30,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:30,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1744180156, now seen corresponding path program 30 times [2024-06-03 20:44:30,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:30,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038991102] [2024-06-03 20:44:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:30,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:30,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:30,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038991102] [2024-06-03 20:44:30,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038991102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:30,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:30,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399371884] [2024-06-03 20:44:30,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:30,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:30,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:30,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:30,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:30,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 535 transitions, 7558 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:30,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:30,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:30,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:32,086 INFO L124 PetriNetUnfolderBase]: 3449/5873 cut-off events. [2024-06-03 20:44:32,086 INFO L125 PetriNetUnfolderBase]: For 558117/558117 co-relation queries the response was YES. [2024-06-03 20:44:32,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42957 conditions, 5873 events. 3449/5873 cut-off events. For 558117/558117 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40707 event pairs, 671 based on Foata normal form. 2/5869 useless extension candidates. Maximal degree in co-relation 42782. Up to 4739 conditions per place. [2024-06-03 20:44:32,169 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 271 changer transitions 0/582 dead transitions. [2024-06-03 20:44:32,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 582 transitions, 9022 flow [2024-06-03 20:44:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:44:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:44:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 294 transitions. [2024-06-03 20:44:32,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:44:32,170 INFO L175 Difference]: Start difference. First operand has 412 places, 535 transitions, 7558 flow. Second operand 12 states and 294 transitions. [2024-06-03 20:44:32,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 582 transitions, 9022 flow [2024-06-03 20:44:34,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 582 transitions, 8768 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 20:44:34,758 INFO L231 Difference]: Finished difference. Result has 417 places, 535 transitions, 7874 flow [2024-06-03 20:44:34,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7308, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7874, PETRI_PLACES=417, PETRI_TRANSITIONS=535} [2024-06-03 20:44:34,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-03 20:44:34,758 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 535 transitions, 7874 flow [2024-06-03 20:44:34,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:34,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:34,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:34,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:44:34,759 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:34,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:34,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2058494034, now seen corresponding path program 5 times [2024-06-03 20:44:34,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:34,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450763934] [2024-06-03 20:44:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:34,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:34,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:34,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450763934] [2024-06-03 20:44:34,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450763934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:34,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:34,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:34,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672221538] [2024-06-03 20:44:34,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:34,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:34,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:35,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:35,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 535 transitions, 7874 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:35,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:35,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:35,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:36,224 INFO L124 PetriNetUnfolderBase]: 3634/6179 cut-off events. [2024-06-03 20:44:36,225 INFO L125 PetriNetUnfolderBase]: For 699733/699733 co-relation queries the response was YES. [2024-06-03 20:44:36,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48989 conditions, 6179 events. 3634/6179 cut-off events. For 699733/699733 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 43104 event pairs, 729 based on Foata normal form. 2/6175 useless extension candidates. Maximal degree in co-relation 48814. Up to 5152 conditions per place. [2024-06-03 20:44:36,318 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 126 changer transitions 0/573 dead transitions. [2024-06-03 20:44:36,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 573 transitions, 9551 flow [2024-06-03 20:44:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:44:36,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-03 20:44:36,319 INFO L175 Difference]: Start difference. First operand has 417 places, 535 transitions, 7874 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:44:36,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 573 transitions, 9551 flow [2024-06-03 20:44:39,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 573 transitions, 8970 flow, removed 11 selfloop flow, removed 15 redundant places. [2024-06-03 20:44:39,654 INFO L231 Difference]: Finished difference. Result has 411 places, 543 transitions, 7837 flow [2024-06-03 20:44:39,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7301, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7837, PETRI_PLACES=411, PETRI_TRANSITIONS=543} [2024-06-03 20:44:39,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-03 20:44:39,655 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 543 transitions, 7837 flow [2024-06-03 20:44:39,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:39,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:39,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:39,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:44:39,656 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:39,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:39,656 INFO L85 PathProgramCache]: Analyzing trace with hash 126478418, now seen corresponding path program 6 times [2024-06-03 20:44:39,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:39,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986544287] [2024-06-03 20:44:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:39,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:39,882 INFO 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 20:44:39,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:39,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986544287] [2024-06-03 20:44:39,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986544287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:39,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:39,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:39,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714760813] [2024-06-03 20:44:39,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:39,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:39,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:39,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 543 transitions, 7837 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:39,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:39,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:39,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:41,269 INFO L124 PetriNetUnfolderBase]: 3773/6411 cut-off events. [2024-06-03 20:44:41,270 INFO L125 PetriNetUnfolderBase]: For 767576/767576 co-relation queries the response was YES. [2024-06-03 20:44:41,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52823 conditions, 6411 events. 3773/6411 cut-off events. For 767576/767576 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44940 event pairs, 773 based on Foata normal form. 2/6406 useless extension candidates. Maximal degree in co-relation 52650. Up to 5411 conditions per place. [2024-06-03 20:44:41,362 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 445 selfloop transitions, 129 changer transitions 0/581 dead transitions. [2024-06-03 20:44:41,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 581 transitions, 9540 flow [2024-06-03 20:44:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:44:41,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:44:41,363 INFO L175 Difference]: Start difference. First operand has 411 places, 543 transitions, 7837 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:44:41,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 581 transitions, 9540 flow [2024-06-03 20:44:44,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 581 transitions, 9249 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 20:44:44,789 INFO L231 Difference]: Finished difference. Result has 415 places, 551 transitions, 8103 flow [2024-06-03 20:44:44,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7546, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8103, PETRI_PLACES=415, PETRI_TRANSITIONS=551} [2024-06-03 20:44:44,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-03 20:44:44,790 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 551 transitions, 8103 flow [2024-06-03 20:44:44,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:44,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:44,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:44,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:44:44,791 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:44,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:44,791 INFO L85 PathProgramCache]: Analyzing trace with hash -280493394, now seen corresponding path program 7 times [2024-06-03 20:44:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:44,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194683109] [2024-06-03 20:44:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194683109] [2024-06-03 20:44:45,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194683109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:45,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:45,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:45,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999498384] [2024-06-03 20:44:45,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:45,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:45,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:45,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:45,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:45,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:45,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 551 transitions, 8103 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:45,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:45,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:45,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:46,321 INFO L124 PetriNetUnfolderBase]: 3781/6429 cut-off events. [2024-06-03 20:44:46,321 INFO L125 PetriNetUnfolderBase]: For 782841/782841 co-relation queries the response was YES. [2024-06-03 20:44:46,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53153 conditions, 6429 events. 3781/6429 cut-off events. For 782841/782841 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 45072 event pairs, 781 based on Foata normal form. 2/6425 useless extension candidates. Maximal degree in co-relation 52978. Up to 5572 conditions per place. [2024-06-03 20:44:46,417 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 449 selfloop transitions, 119 changer transitions 0/575 dead transitions. [2024-06-03 20:44:46,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 575 transitions, 9348 flow [2024-06-03 20:44:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:44:46,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-03 20:44:46,418 INFO L175 Difference]: Start difference. First operand has 415 places, 551 transitions, 8103 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:44:46,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 575 transitions, 9348 flow [2024-06-03 20:44:50,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 575 transitions, 9034 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 20:44:50,130 INFO L231 Difference]: Finished difference. Result has 418 places, 553 transitions, 8091 flow [2024-06-03 20:44:50,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8091, PETRI_PLACES=418, PETRI_TRANSITIONS=553} [2024-06-03 20:44:50,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-03 20:44:50,131 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 553 transitions, 8091 flow [2024-06-03 20:44:50,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:50,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:50,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:50,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:44:50,131 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:50,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:50,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2085254796, now seen corresponding path program 8 times [2024-06-03 20:44:50,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:50,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440530257] [2024-06-03 20:44:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:50,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:50,368 INFO 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 20:44:50,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:50,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440530257] [2024-06-03 20:44:50,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440530257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:50,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:50,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:50,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102903435] [2024-06-03 20:44:50,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:50,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:50,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:50,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:50,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:50,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:50,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 553 transitions, 8091 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:50,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:50,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:50,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:51,673 INFO L124 PetriNetUnfolderBase]: 3776/6422 cut-off events. [2024-06-03 20:44:51,673 INFO L125 PetriNetUnfolderBase]: For 785298/785298 co-relation queries the response was YES. [2024-06-03 20:44:51,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52756 conditions, 6422 events. 3776/6422 cut-off events. For 785298/785298 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 45103 event pairs, 780 based on Foata normal form. 2/6418 useless extension candidates. Maximal degree in co-relation 52580. Up to 5565 conditions per place. [2024-06-03 20:44:51,766 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 446 selfloop transitions, 122 changer transitions 0/575 dead transitions. [2024-06-03 20:44:51,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 575 transitions, 9281 flow [2024-06-03 20:44:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:44:51,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:44:51,767 INFO L175 Difference]: Start difference. First operand has 418 places, 553 transitions, 8091 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:44:51,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 575 transitions, 9281 flow [2024-06-03 20:44:55,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 575 transitions, 9006 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:44:55,524 INFO L231 Difference]: Finished difference. Result has 420 places, 553 transitions, 8065 flow [2024-06-03 20:44:55,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7816, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8065, PETRI_PLACES=420, PETRI_TRANSITIONS=553} [2024-06-03 20:44:55,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-03 20:44:55,524 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 553 transitions, 8065 flow [2024-06-03 20:44:55,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:55,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:55,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:55,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:44:55,525 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:55,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2094421330, now seen corresponding path program 9 times [2024-06-03 20:44:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:55,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884452881] [2024-06-03 20:44:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:55,772 INFO 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 20:44:55,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:55,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884452881] [2024-06-03 20:44:55,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884452881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:55,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:55,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:55,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696750324] [2024-06-03 20:44:55,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:55,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:55,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:55,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:55,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:55,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:55,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 553 transitions, 8065 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:44:55,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:55,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:55,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:57,075 INFO L124 PetriNetUnfolderBase]: 3784/6434 cut-off events. [2024-06-03 20:44:57,076 INFO L125 PetriNetUnfolderBase]: For 800530/800530 co-relation queries the response was YES. [2024-06-03 20:44:57,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52988 conditions, 6434 events. 3784/6434 cut-off events. For 800530/800530 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 45189 event pairs, 780 based on Foata normal form. 2/6430 useless extension candidates. Maximal degree in co-relation 52811. Up to 5733 conditions per place. [2024-06-03 20:44:57,168 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 508 selfloop transitions, 59 changer transitions 0/574 dead transitions. [2024-06-03 20:44:57,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 574 transitions, 9311 flow [2024-06-03 20:44:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 20:44:57,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-03 20:44:57,170 INFO L175 Difference]: Start difference. First operand has 420 places, 553 transitions, 8065 flow. Second operand 8 states and 181 transitions. [2024-06-03 20:44:57,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 574 transitions, 9311 flow [2024-06-03 20:45:01,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 574 transitions, 9030 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:45:01,243 INFO L231 Difference]: Finished difference. Result has 422 places, 555 transitions, 7977 flow [2024-06-03 20:45:01,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7784, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7977, PETRI_PLACES=422, PETRI_TRANSITIONS=555} [2024-06-03 20:45:01,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-03 20:45:01,244 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 555 transitions, 7977 flow [2024-06-03 20:45:01,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:01,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:01,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:01,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:45:01,245 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:01,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:01,245 INFO L85 PathProgramCache]: Analyzing trace with hash 33145386, now seen corresponding path program 10 times [2024-06-03 20:45:01,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:01,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519736145] [2024-06-03 20:45:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:01,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:01,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:01,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519736145] [2024-06-03 20:45:01,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519736145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:01,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:01,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:01,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475318695] [2024-06-03 20:45:01,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:01,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:01,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:01,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:01,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:01,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:01,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 555 transitions, 7977 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:01,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:01,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:01,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:02,866 INFO L124 PetriNetUnfolderBase]: 3792/6460 cut-off events. [2024-06-03 20:45:02,867 INFO L125 PetriNetUnfolderBase]: For 816546/816546 co-relation queries the response was YES. [2024-06-03 20:45:02,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53075 conditions, 6460 events. 3792/6460 cut-off events. For 816546/816546 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 45269 event pairs, 610 based on Foata normal form. 2/6456 useless extension candidates. Maximal degree in co-relation 52897. Up to 4005 conditions per place. [2024-06-03 20:45:02,954 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 157 changer transitions 0/592 dead transitions. [2024-06-03 20:45:02,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 592 transitions, 9744 flow [2024-06-03 20:45:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 20:45:02,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-03 20:45:02,955 INFO L175 Difference]: Start difference. First operand has 422 places, 555 transitions, 7977 flow. Second operand 8 states and 199 transitions. [2024-06-03 20:45:02,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 592 transitions, 9744 flow [2024-06-03 20:45:06,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 592 transitions, 9585 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:45:06,629 INFO L231 Difference]: Finished difference. Result has 424 places, 557 transitions, 8196 flow [2024-06-03 20:45:06,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7818, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8196, PETRI_PLACES=424, PETRI_TRANSITIONS=557} [2024-06-03 20:45:06,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-03 20:45:06,630 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 557 transitions, 8196 flow [2024-06-03 20:45:06,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:06,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:06,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:06,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:45:06,631 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:06,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1910393872, now seen corresponding path program 11 times [2024-06-03 20:45:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:06,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261267160] [2024-06-03 20:45:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:06,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:06,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:06,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261267160] [2024-06-03 20:45:06,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261267160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:06,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:06,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:06,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251888594] [2024-06-03 20:45:06,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:06,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:06,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:06,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:06,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 557 transitions, 8196 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:06,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:06,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:06,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:08,166 INFO L124 PetriNetUnfolderBase]: 3767/6408 cut-off events. [2024-06-03 20:45:08,166 INFO L125 PetriNetUnfolderBase]: For 827397/827397 co-relation queries the response was YES. [2024-06-03 20:45:08,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52959 conditions, 6408 events. 3767/6408 cut-off events. For 827397/827397 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44816 event pairs, 673 based on Foata normal form. 8/6410 useless extension candidates. Maximal degree in co-relation 52780. Up to 3991 conditions per place. [2024-06-03 20:45:08,261 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 144 changer transitions 0/589 dead transitions. [2024-06-03 20:45:08,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 589 transitions, 9692 flow [2024-06-03 20:45:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:08,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:45:08,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:45:08,262 INFO L175 Difference]: Start difference. First operand has 424 places, 557 transitions, 8196 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:45:08,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 589 transitions, 9692 flow [2024-06-03 20:45:12,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 589 transitions, 9239 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-03 20:45:12,434 INFO L231 Difference]: Finished difference. Result has 424 places, 557 transitions, 8037 flow [2024-06-03 20:45:12,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8037, PETRI_PLACES=424, PETRI_TRANSITIONS=557} [2024-06-03 20:45:12,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-03 20:45:12,435 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 557 transitions, 8037 flow [2024-06-03 20:45:12,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:12,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:12,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:12,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:45:12,435 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:12,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1503903190, now seen corresponding path program 12 times [2024-06-03 20:45:12,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:12,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891104983] [2024-06-03 20:45:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:12,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:12,665 INFO 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 20:45:12,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891104983] [2024-06-03 20:45:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891104983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:12,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:12,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:12,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712650962] [2024-06-03 20:45:12,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:12,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:12,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:12,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:12,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 557 transitions, 8037 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:12,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:12,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:12,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:13,967 INFO L124 PetriNetUnfolderBase]: 3744/6374 cut-off events. [2024-06-03 20:45:13,967 INFO L125 PetriNetUnfolderBase]: For 795244/795244 co-relation queries the response was YES. [2024-06-03 20:45:14,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51016 conditions, 6374 events. 3744/6374 cut-off events. For 795244/795244 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44731 event pairs, 744 based on Foata normal form. 10/6378 useless extension candidates. Maximal degree in co-relation 50839. Up to 5239 conditions per place. [2024-06-03 20:45:14,059 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 117 changer transitions 0/584 dead transitions. [2024-06-03 20:45:14,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 584 transitions, 9517 flow [2024-06-03 20:45:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:45:14,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:45:14,060 INFO L175 Difference]: Start difference. First operand has 424 places, 557 transitions, 8037 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:45:14,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 584 transitions, 9517 flow [2024-06-03 20:45:18,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 584 transitions, 9204 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:45:18,178 INFO L231 Difference]: Finished difference. Result has 425 places, 557 transitions, 7965 flow [2024-06-03 20:45:18,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7724, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7965, PETRI_PLACES=425, PETRI_TRANSITIONS=557} [2024-06-03 20:45:18,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-03 20:45:18,179 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 557 transitions, 7965 flow [2024-06-03 20:45:18,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:18,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:18,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:18,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:45:18,179 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:18,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash 366705650, now seen corresponding path program 13 times [2024-06-03 20:45:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:18,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341682022] [2024-06-03 20:45:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:18,415 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 20:45:18,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:18,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341682022] [2024-06-03 20:45:18,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341682022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:18,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:18,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:18,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537455780] [2024-06-03 20:45:18,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:18,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:18,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:18,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:18,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:18,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:18,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 557 transitions, 7965 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:18,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:18,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:18,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:19,652 INFO L124 PetriNetUnfolderBase]: 3714/6328 cut-off events. [2024-06-03 20:45:19,652 INFO L125 PetriNetUnfolderBase]: For 755964/755964 co-relation queries the response was YES. [2024-06-03 20:45:19,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49339 conditions, 6328 events. 3714/6328 cut-off events. For 755964/755964 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44457 event pairs, 750 based on Foata normal form. 10/6332 useless extension candidates. Maximal degree in co-relation 49161. Up to 5439 conditions per place. [2024-06-03 20:45:19,746 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 111 changer transitions 0/579 dead transitions. [2024-06-03 20:45:19,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 579 transitions, 9193 flow [2024-06-03 20:45:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:45:19,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:45:19,747 INFO L175 Difference]: Start difference. First operand has 425 places, 557 transitions, 7965 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:45:19,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 579 transitions, 9193 flow [2024-06-03 20:45:23,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 579 transitions, 8932 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 20:45:23,658 INFO L231 Difference]: Finished difference. Result has 428 places, 557 transitions, 7932 flow [2024-06-03 20:45:23,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7704, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7932, PETRI_PLACES=428, PETRI_TRANSITIONS=557} [2024-06-03 20:45:23,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-03 20:45:23,659 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 557 transitions, 7932 flow [2024-06-03 20:45:23,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:23,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:23,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:23,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:45:23,659 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:23,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1650705070, now seen corresponding path program 14 times [2024-06-03 20:45:23,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:23,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513099187] [2024-06-03 20:45:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:23,900 INFO 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 20:45:23,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:23,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513099187] [2024-06-03 20:45:23,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513099187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:23,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:23,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:23,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723515532] [2024-06-03 20:45:23,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:23,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:23,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:23,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:23,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:23,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:23,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 557 transitions, 7932 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:23,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:23,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:23,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:25,259 INFO L124 PetriNetUnfolderBase]: 3691/6295 cut-off events. [2024-06-03 20:45:25,259 INFO L125 PetriNetUnfolderBase]: For 714532/714532 co-relation queries the response was YES. [2024-06-03 20:45:25,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47836 conditions, 6295 events. 3691/6295 cut-off events. For 714532/714532 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44257 event pairs, 741 based on Foata normal form. 10/6299 useless extension candidates. Maximal degree in co-relation 47657. Up to 5524 conditions per place. [2024-06-03 20:45:25,346 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 497 selfloop transitions, 74 changer transitions 0/578 dead transitions. [2024-06-03 20:45:25,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 578 transitions, 9154 flow [2024-06-03 20:45:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:45:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:45:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-03 20:45:25,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-03 20:45:25,347 INFO L175 Difference]: Start difference. First operand has 428 places, 557 transitions, 7932 flow. Second operand 10 states and 222 transitions. [2024-06-03 20:45:25,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 578 transitions, 9154 flow [2024-06-03 20:45:29,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 578 transitions, 8891 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:45:29,611 INFO L231 Difference]: Finished difference. Result has 430 places, 557 transitions, 7823 flow [2024-06-03 20:45:29,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7669, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7823, PETRI_PLACES=430, PETRI_TRANSITIONS=557} [2024-06-03 20:45:29,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-03 20:45:29,611 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 557 transitions, 7823 flow [2024-06-03 20:45:29,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:29,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:29,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:29,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:45:29,612 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:29,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:29,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1907205580, now seen corresponding path program 15 times [2024-06-03 20:45:29,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:29,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632221947] [2024-06-03 20:45:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:29,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:29,851 INFO 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 20:45:29,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632221947] [2024-06-03 20:45:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632221947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:29,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:29,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475167439] [2024-06-03 20:45:29,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:29,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:29,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:29,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 557 transitions, 7823 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:29,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:29,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:29,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:31,102 INFO L124 PetriNetUnfolderBase]: 3668/6262 cut-off events. [2024-06-03 20:45:31,102 INFO L125 PetriNetUnfolderBase]: For 672982/672982 co-relation queries the response was YES. [2024-06-03 20:45:31,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46436 conditions, 6262 events. 3668/6262 cut-off events. For 672982/672982 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44046 event pairs, 732 based on Foata normal form. 10/6266 useless extension candidates. Maximal degree in co-relation 46256. Up to 5491 conditions per place. [2024-06-03 20:45:31,193 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 499 selfloop transitions, 70 changer transitions 0/576 dead transitions. [2024-06-03 20:45:31,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 576 transitions, 9037 flow [2024-06-03 20:45:31,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:45:31,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:45:31,194 INFO L175 Difference]: Start difference. First operand has 430 places, 557 transitions, 7823 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:45:31,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 576 transitions, 9037 flow [2024-06-03 20:45:34,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 576 transitions, 8859 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 20:45:34,767 INFO L231 Difference]: Finished difference. Result has 430 places, 557 transitions, 7791 flow [2024-06-03 20:45:34,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7645, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7791, PETRI_PLACES=430, PETRI_TRANSITIONS=557} [2024-06-03 20:45:34,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-03 20:45:34,768 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 557 transitions, 7791 flow [2024-06-03 20:45:34,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:34,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:34,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:34,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:45:34,769 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:34,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1916728780, now seen corresponding path program 16 times [2024-06-03 20:45:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:34,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768309620] [2024-06-03 20:45:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:34,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:35,004 INFO 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 20:45:35,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:35,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768309620] [2024-06-03 20:45:35,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768309620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:35,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:35,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:35,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158634099] [2024-06-03 20:45:35,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:35,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:35,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:35,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:35,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 557 transitions, 7791 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:35,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:35,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:35,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:36,288 INFO L124 PetriNetUnfolderBase]: 3638/6212 cut-off events. [2024-06-03 20:45:36,288 INFO L125 PetriNetUnfolderBase]: For 628210/628210 co-relation queries the response was YES. [2024-06-03 20:45:36,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44931 conditions, 6212 events. 3638/6212 cut-off events. For 628210/628210 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 43635 event pairs, 702 based on Foata normal form. 10/6216 useless extension candidates. Maximal degree in co-relation 44750. Up to 5117 conditions per place. [2024-06-03 20:45:36,377 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 496 selfloop transitions, 77 changer transitions 0/580 dead transitions. [2024-06-03 20:45:36,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 580 transitions, 9053 flow [2024-06-03 20:45:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:45:36,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-03 20:45:36,378 INFO L175 Difference]: Start difference. First operand has 430 places, 557 transitions, 7791 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:45:36,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 580 transitions, 9053 flow [2024-06-03 20:45:39,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 580 transitions, 8861 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 20:45:39,546 INFO L231 Difference]: Finished difference. Result has 432 places, 557 transitions, 7761 flow [2024-06-03 20:45:39,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7599, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7761, PETRI_PLACES=432, PETRI_TRANSITIONS=557} [2024-06-03 20:45:39,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-03 20:45:39,547 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 557 transitions, 7761 flow [2024-06-03 20:45:39,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:39,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:39,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:39,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:45:39,547 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:39,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2093718568, now seen corresponding path program 1 times [2024-06-03 20:45:39,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:39,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115723890] [2024-06-03 20:45:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:39,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:39,813 INFO 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 20:45:39,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:39,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115723890] [2024-06-03 20:45:39,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115723890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:39,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:39,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:45:39,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702692998] [2024-06-03 20:45:39,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:39,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:45:39,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:45:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:45:39,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:39,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 557 transitions, 7761 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:39,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:39,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:39,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:41,044 INFO L124 PetriNetUnfolderBase]: 3646/6228 cut-off events. [2024-06-03 20:45:41,045 INFO L125 PetriNetUnfolderBase]: For 595806/595806 co-relation queries the response was YES. [2024-06-03 20:45:41,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44950 conditions, 6228 events. 3646/6228 cut-off events. For 595806/595806 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 43835 event pairs, 718 based on Foata normal form. 2/6224 useless extension candidates. Maximal degree in co-relation 44768. Up to 5530 conditions per place. [2024-06-03 20:45:41,137 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 515 selfloop transitions, 52 changer transitions 0/574 dead transitions. [2024-06-03 20:45:41,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 574 transitions, 8985 flow [2024-06-03 20:45:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:45:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:45:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:45:41,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:45:41,138 INFO L175 Difference]: Start difference. First operand has 432 places, 557 transitions, 7761 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:45:41,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 574 transitions, 8985 flow [2024-06-03 20:45:44,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 574 transitions, 8808 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:45:44,649 INFO L231 Difference]: Finished difference. Result has 432 places, 559 transitions, 7751 flow [2024-06-03 20:45:44,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7584, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7751, PETRI_PLACES=432, PETRI_TRANSITIONS=559} [2024-06-03 20:45:44,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-03 20:45:44,651 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 559 transitions, 7751 flow [2024-06-03 20:45:44,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:44,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:44,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:44,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:45:44,652 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:44,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2094223558, now seen corresponding path program 2 times [2024-06-03 20:45:44,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:44,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21808961] [2024-06-03 20:45:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:44,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:44,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:44,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21808961] [2024-06-03 20:45:44,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21808961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:44,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:44,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:45:44,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225898211] [2024-06-03 20:45:44,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:44,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:45:44,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:44,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:45:44,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:45:44,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:44,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 559 transitions, 7751 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:44,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:44,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:44,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:46,253 INFO L124 PetriNetUnfolderBase]: 3654/6236 cut-off events. [2024-06-03 20:45:46,253 INFO L125 PetriNetUnfolderBase]: For 605381/605381 co-relation queries the response was YES. [2024-06-03 20:45:46,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45003 conditions, 6236 events. 3654/6236 cut-off events. For 605381/605381 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 43790 event pairs, 712 based on Foata normal form. 2/6232 useless extension candidates. Maximal degree in co-relation 44820. Up to 5522 conditions per place. [2024-06-03 20:45:46,335 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 516 selfloop transitions, 54 changer transitions 0/577 dead transitions. [2024-06-03 20:45:46,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 577 transitions, 8987 flow [2024-06-03 20:45:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:45:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:45:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:45:46,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:45:46,336 INFO L175 Difference]: Start difference. First operand has 432 places, 559 transitions, 7751 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:45:46,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 577 transitions, 8987 flow [2024-06-03 20:45:49,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 577 transitions, 8816 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 20:45:49,447 INFO L231 Difference]: Finished difference. Result has 434 places, 561 transitions, 7755 flow [2024-06-03 20:45:49,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7580, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7755, PETRI_PLACES=434, PETRI_TRANSITIONS=561} [2024-06-03 20:45:49,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-03 20:45:49,448 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 561 transitions, 7755 flow [2024-06-03 20:45:49,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:49,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:49,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:49,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:45:49,449 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:49,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash 714949772, now seen corresponding path program 17 times [2024-06-03 20:45:49,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:49,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785122357] [2024-06-03 20:45:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:49,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:49,686 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 20:45:49,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:49,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785122357] [2024-06-03 20:45:49,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785122357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:49,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:49,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:49,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342632730] [2024-06-03 20:45:49,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:49,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:49,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:49,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:49,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:49,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:49,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 561 transitions, 7755 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:49,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:49,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:49,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:50,965 INFO L124 PetriNetUnfolderBase]: 3631/6203 cut-off events. [2024-06-03 20:45:50,965 INFO L125 PetriNetUnfolderBase]: For 582148/582151 co-relation queries the response was YES. [2024-06-03 20:45:51,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43308 conditions, 6203 events. 3631/6203 cut-off events. For 582148/582151 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 43685 event pairs, 702 based on Foata normal form. 12/6204 useless extension candidates. Maximal degree in co-relation 43124. Up to 5318 conditions per place. [2024-06-03 20:45:51,060 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 131 changer transitions 0/599 dead transitions. [2024-06-03 20:45:51,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 599 transitions, 9065 flow [2024-06-03 20:45:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:45:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:45:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-03 20:45:51,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-03 20:45:51,061 INFO L175 Difference]: Start difference. First operand has 434 places, 561 transitions, 7755 flow. Second operand 9 states and 226 transitions. [2024-06-03 20:45:51,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 599 transitions, 9065 flow [2024-06-03 20:45:53,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 599 transitions, 8876 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-03 20:45:53,640 INFO L231 Difference]: Finished difference. Result has 438 places, 561 transitions, 7843 flow [2024-06-03 20:45:53,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7566, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7843, PETRI_PLACES=438, PETRI_TRANSITIONS=561} [2024-06-03 20:45:53,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-03 20:45:53,640 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 561 transitions, 7843 flow [2024-06-03 20:45:53,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:53,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:53,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:53,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:45:53,641 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:53,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:53,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1740409996, now seen corresponding path program 18 times [2024-06-03 20:45:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:53,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118696670] [2024-06-03 20:45:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:53,884 INFO 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 20:45:53,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:53,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118696670] [2024-06-03 20:45:53,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118696670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:53,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:53,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:53,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284592404] [2024-06-03 20:45:53,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:53,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:53,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:53,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:53,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 561 transitions, 7843 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:53,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:53,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:53,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:55,122 INFO L124 PetriNetUnfolderBase]: 3608/6175 cut-off events. [2024-06-03 20:45:55,122 INFO L125 PetriNetUnfolderBase]: For 533534/533534 co-relation queries the response was YES. [2024-06-03 20:45:55,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42044 conditions, 6175 events. 3608/6175 cut-off events. For 533534/533534 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 43502 event pairs, 697 based on Foata normal form. 10/6179 useless extension candidates. Maximal degree in co-relation 41859. Up to 5253 conditions per place. [2024-06-03 20:45:55,211 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 123 changer transitions 0/596 dead transitions. [2024-06-03 20:45:55,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 596 transitions, 9139 flow [2024-06-03 20:45:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:45:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:45:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-03 20:45:55,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:45:55,213 INFO L175 Difference]: Start difference. First operand has 438 places, 561 transitions, 7843 flow. Second operand 9 states and 222 transitions. [2024-06-03 20:45:55,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 596 transitions, 9139 flow [2024-06-03 20:45:58,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 596 transitions, 8837 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-03 20:45:58,630 INFO L231 Difference]: Finished difference. Result has 438 places, 561 transitions, 7803 flow [2024-06-03 20:45:58,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7541, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7803, PETRI_PLACES=438, PETRI_TRANSITIONS=561} [2024-06-03 20:45:58,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-03 20:45:58,631 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 561 transitions, 7803 flow [2024-06-03 20:45:58,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:58,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:58,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:58,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:45:58,631 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:58,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash 423818834, now seen corresponding path program 19 times [2024-06-03 20:45:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:58,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199576172] [2024-06-03 20:45:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:58,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:58,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199576172] [2024-06-03 20:45:58,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199576172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:58,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:58,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:58,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309520669] [2024-06-03 20:45:58,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:58,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:58,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:58,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:58,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:58,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:58,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 561 transitions, 7803 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:45:58,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:58,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:58,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:00,214 INFO L124 PetriNetUnfolderBase]: 3585/6142 cut-off events. [2024-06-03 20:46:00,214 INFO L125 PetriNetUnfolderBase]: For 467297/467297 co-relation queries the response was YES. [2024-06-03 20:46:00,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40489 conditions, 6142 events. 3585/6142 cut-off events. For 467297/467297 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 43374 event pairs, 688 based on Foata normal form. 10/6146 useless extension candidates. Maximal degree in co-relation 40304. Up to 5226 conditions per place. [2024-06-03 20:46:00,300 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 472 selfloop transitions, 109 changer transitions 0/588 dead transitions. [2024-06-03 20:46:00,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 588 transitions, 9063 flow [2024-06-03 20:46:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:46:00,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 20:46:00,301 INFO L175 Difference]: Start difference. First operand has 438 places, 561 transitions, 7803 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:46:00,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 588 transitions, 9063 flow [2024-06-03 20:46:03,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 588 transitions, 8773 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-03 20:46:03,465 INFO L231 Difference]: Finished difference. Result has 435 places, 561 transitions, 7744 flow [2024-06-03 20:46:03,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7513, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7744, PETRI_PLACES=435, PETRI_TRANSITIONS=561} [2024-06-03 20:46:03,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-03 20:46:03,465 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 561 transitions, 7744 flow [2024-06-03 20:46:03,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:03,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:03,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:03,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:46:03,466 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:03,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:03,466 INFO L85 PathProgramCache]: Analyzing trace with hash 433342034, now seen corresponding path program 20 times [2024-06-03 20:46:03,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:03,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418108409] [2024-06-03 20:46:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:03,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:03,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:03,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418108409] [2024-06-03 20:46:03,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418108409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:03,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:03,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:03,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713400941] [2024-06-03 20:46:03,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:03,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:03,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:03,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:03,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:03,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 561 transitions, 7744 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:03,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:03,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:03,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:04,942 INFO L124 PetriNetUnfolderBase]: 3555/6105 cut-off events. [2024-06-03 20:46:04,942 INFO L125 PetriNetUnfolderBase]: For 402840/402840 co-relation queries the response was YES. [2024-06-03 20:46:05,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38826 conditions, 6105 events. 3555/6105 cut-off events. For 402840/402840 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 43014 event pairs, 550 based on Foata normal form. 10/6109 useless extension candidates. Maximal degree in co-relation 38642. Up to 4335 conditions per place. [2024-06-03 20:46:05,029 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 454 selfloop transitions, 131 changer transitions 0/592 dead transitions. [2024-06-03 20:46:05,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 592 transitions, 9052 flow [2024-06-03 20:46:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:46:05,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 20:46:05,030 INFO L175 Difference]: Start difference. First operand has 435 places, 561 transitions, 7744 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:46:05,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 592 transitions, 9052 flow [2024-06-03 20:46:07,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 592 transitions, 8791 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 20:46:07,948 INFO L231 Difference]: Finished difference. Result has 435 places, 561 transitions, 7763 flow [2024-06-03 20:46:07,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7483, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7763, PETRI_PLACES=435, PETRI_TRANSITIONS=561} [2024-06-03 20:46:07,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-03 20:46:07,949 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 561 transitions, 7763 flow [2024-06-03 20:46:07,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:07,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:07,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:07,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:46:07,949 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:07,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:07,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1982213190, now seen corresponding path program 3 times [2024-06-03 20:46:07,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:07,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317057401] [2024-06-03 20:46:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:07,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:08,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317057401] [2024-06-03 20:46:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317057401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:08,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:08,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:08,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312296414] [2024-06-03 20:46:08,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:08,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:08,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:08,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 561 transitions, 7763 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:08,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:08,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:08,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:09,338 INFO L124 PetriNetUnfolderBase]: 3563/6109 cut-off events. [2024-06-03 20:46:09,339 INFO L125 PetriNetUnfolderBase]: For 361829/361829 co-relation queries the response was YES. [2024-06-03 20:46:09,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39145 conditions, 6109 events. 3563/6109 cut-off events. For 361829/361829 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 43081 event pairs, 681 based on Foata normal form. 2/6105 useless extension candidates. Maximal degree in co-relation 38961. Up to 5403 conditions per place. [2024-06-03 20:46:09,433 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 516 selfloop transitions, 57 changer transitions 0/580 dead transitions. [2024-06-03 20:46:09,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 580 transitions, 9013 flow [2024-06-03 20:46:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:46:09,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-03 20:46:09,435 INFO L175 Difference]: Start difference. First operand has 435 places, 561 transitions, 7763 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:46:09,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 580 transitions, 9013 flow [2024-06-03 20:46:12,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 580 transitions, 8667 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:46:12,187 INFO L231 Difference]: Finished difference. Result has 433 places, 563 transitions, 7605 flow [2024-06-03 20:46:12,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7605, PETRI_PLACES=433, PETRI_TRANSITIONS=563} [2024-06-03 20:46:12,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-03 20:46:12,188 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 563 transitions, 7605 flow [2024-06-03 20:46:12,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:12,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:12,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:12,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:46:12,188 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:12,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:12,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1966976070, now seen corresponding path program 4 times [2024-06-03 20:46:12,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:12,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916883837] [2024-06-03 20:46:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:12,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916883837] [2024-06-03 20:46:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916883837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:12,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:12,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:12,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643559849] [2024-06-03 20:46:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:12,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:12,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:12,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 563 transitions, 7605 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:12,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:12,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:12,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:13,615 INFO L124 PetriNetUnfolderBase]: 3571/6109 cut-off events. [2024-06-03 20:46:13,615 INFO L125 PetriNetUnfolderBase]: For 358864/358864 co-relation queries the response was YES. [2024-06-03 20:46:13,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38591 conditions, 6109 events. 3571/6109 cut-off events. For 358864/358864 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 43055 event pairs, 667 based on Foata normal form. 2/6105 useless extension candidates. Maximal degree in co-relation 38407. Up to 5353 conditions per place. [2024-06-03 20:46:13,702 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 511 selfloop transitions, 63 changer transitions 0/581 dead transitions. [2024-06-03 20:46:13,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 581 transitions, 8870 flow [2024-06-03 20:46:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 20:46:13,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:46:13,704 INFO L175 Difference]: Start difference. First operand has 433 places, 563 transitions, 7605 flow. Second operand 6 states and 141 transitions. [2024-06-03 20:46:13,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 581 transitions, 8870 flow [2024-06-03 20:46:16,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 581 transitions, 8698 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:16,153 INFO L231 Difference]: Finished difference. Result has 436 places, 566 transitions, 7676 flow [2024-06-03 20:46:16,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7437, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7676, PETRI_PLACES=436, PETRI_TRANSITIONS=566} [2024-06-03 20:46:16,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-03 20:46:16,153 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 566 transitions, 7676 flow [2024-06-03 20:46:16,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:16,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:16,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:16,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:46:16,154 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:16,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1911914298, now seen corresponding path program 5 times [2024-06-03 20:46:16,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:16,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114097755] [2024-06-03 20:46:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:16,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:16,377 INFO 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 20:46:16,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:16,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114097755] [2024-06-03 20:46:16,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114097755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:16,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:16,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:16,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496500729] [2024-06-03 20:46:16,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:16,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:16,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:16,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:16,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:16,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:16,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 566 transitions, 7676 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:16,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:16,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:16,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:17,569 INFO L124 PetriNetUnfolderBase]: 3579/6122 cut-off events. [2024-06-03 20:46:17,570 INFO L125 PetriNetUnfolderBase]: For 360315/360318 co-relation queries the response was YES. [2024-06-03 20:46:17,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38789 conditions, 6122 events. 3579/6122 cut-off events. For 360315/360318 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 43232 event pairs, 636 based on Foata normal form. 4/6118 useless extension candidates. Maximal degree in co-relation 38603. Up to 5296 conditions per place. [2024-06-03 20:46:17,659 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 509 selfloop transitions, 70 changer transitions 0/586 dead transitions. [2024-06-03 20:46:17,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 586 transitions, 9226 flow [2024-06-03 20:46:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 20:46:17,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-03 20:46:17,661 INFO L175 Difference]: Start difference. First operand has 436 places, 566 transitions, 7676 flow. Second operand 6 states and 139 transitions. [2024-06-03 20:46:17,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 586 transitions, 9226 flow [2024-06-03 20:46:20,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 586 transitions, 9044 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:20,490 INFO L231 Difference]: Finished difference. Result has 441 places, 572 transitions, 7844 flow [2024-06-03 20:46:20,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7504, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7844, PETRI_PLACES=441, PETRI_TRANSITIONS=572} [2024-06-03 20:46:20,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-03 20:46:20,491 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 572 transitions, 7844 flow [2024-06-03 20:46:20,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:20,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:20,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:20,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:46:20,492 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:20,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1800282626, now seen corresponding path program 6 times [2024-06-03 20:46:20,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:20,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566205528] [2024-06-03 20:46:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:20,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:20,709 INFO 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 20:46:20,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:20,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566205528] [2024-06-03 20:46:20,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566205528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:20,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:20,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:20,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23880753] [2024-06-03 20:46:20,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:20,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:20,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:20,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:20,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:20,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:20,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 572 transitions, 7844 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:20,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:20,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:20,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:21,919 INFO L124 PetriNetUnfolderBase]: 3574/6115 cut-off events. [2024-06-03 20:46:21,920 INFO L125 PetriNetUnfolderBase]: For 349032/349035 co-relation queries the response was YES. [2024-06-03 20:46:21,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38600 conditions, 6115 events. 3574/6115 cut-off events. For 349032/349035 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 43136 event pairs, 636 based on Foata normal form. 4/6111 useless extension candidates. Maximal degree in co-relation 38411. Up to 5292 conditions per place. [2024-06-03 20:46:22,012 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 510 selfloop transitions, 69 changer transitions 0/586 dead transitions. [2024-06-03 20:46:22,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 586 transitions, 9071 flow [2024-06-03 20:46:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 20:46:22,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:46:22,013 INFO L175 Difference]: Start difference. First operand has 441 places, 572 transitions, 7844 flow. Second operand 6 states and 138 transitions. [2024-06-03 20:46:22,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 586 transitions, 9071 flow [2024-06-03 20:46:24,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 586 transitions, 8821 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:24,937 INFO L231 Difference]: Finished difference. Result has 445 places, 573 transitions, 7776 flow [2024-06-03 20:46:24,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7776, PETRI_PLACES=445, PETRI_TRANSITIONS=573} [2024-06-03 20:46:24,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-03 20:46:24,938 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 573 transitions, 7776 flow [2024-06-03 20:46:24,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:24,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:24,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:24,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 20:46:24,938 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:24,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:24,939 INFO L85 PathProgramCache]: Analyzing trace with hash 116034953, now seen corresponding path program 1 times [2024-06-03 20:46:24,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:24,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629645409] [2024-06-03 20:46:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:24,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:25,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:25,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629645409] [2024-06-03 20:46:25,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629645409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:25,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:25,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684444795] [2024-06-03 20:46:25,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:25,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:25,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:25,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:25,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:25,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:25,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 573 transitions, 7776 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:25,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:25,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:25,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:26,394 INFO L124 PetriNetUnfolderBase]: 3571/6115 cut-off events. [2024-06-03 20:46:26,394 INFO L125 PetriNetUnfolderBase]: For 340271/340271 co-relation queries the response was YES. [2024-06-03 20:46:26,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38287 conditions, 6115 events. 3571/6115 cut-off events. For 340271/340271 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 43217 event pairs, 697 based on Foata normal form. 1/6107 useless extension candidates. Maximal degree in co-relation 38097. Up to 5148 conditions per place. [2024-06-03 20:46:26,484 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 164 changer transitions 0/591 dead transitions. [2024-06-03 20:46:26,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 591 transitions, 9198 flow [2024-06-03 20:46:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:46:26,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 20:46:26,485 INFO L175 Difference]: Start difference. First operand has 445 places, 573 transitions, 7776 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:46:26,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 591 transitions, 9198 flow [2024-06-03 20:46:29,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 591 transitions, 9091 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:29,384 INFO L231 Difference]: Finished difference. Result has 450 places, 573 transitions, 8012 flow [2024-06-03 20:46:29,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7669, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8012, PETRI_PLACES=450, PETRI_TRANSITIONS=573} [2024-06-03 20:46:29,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-03 20:46:29,385 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 573 transitions, 8012 flow [2024-06-03 20:46:29,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:29,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:29,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:29,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 20:46:29,385 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:29,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:29,386 INFO L85 PathProgramCache]: Analyzing trace with hash 457085379, now seen corresponding path program 2 times [2024-06-03 20:46:29,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:29,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604323821] [2024-06-03 20:46:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:29,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:29,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:29,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604323821] [2024-06-03 20:46:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604323821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:29,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:29,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:29,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467517024] [2024-06-03 20:46:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:29,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:29,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:29,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:29,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 573 transitions, 8012 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:29,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:29,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:29,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:31,029 INFO L124 PetriNetUnfolderBase]: 3576/6124 cut-off events. [2024-06-03 20:46:31,030 INFO L125 PetriNetUnfolderBase]: For 347099/347099 co-relation queries the response was YES. [2024-06-03 20:46:31,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38647 conditions, 6124 events. 3576/6124 cut-off events. For 347099/347099 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 43300 event pairs, 697 based on Foata normal form. 1/6116 useless extension candidates. Maximal degree in co-relation 38456. Up to 5311 conditions per place. [2024-06-03 20:46:31,110 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 476 selfloop transitions, 108 changer transitions 0/591 dead transitions. [2024-06-03 20:46:31,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 591 transitions, 9480 flow [2024-06-03 20:46:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:46:31,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-03 20:46:31,111 INFO L175 Difference]: Start difference. First operand has 450 places, 573 transitions, 8012 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:46:31,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 591 transitions, 9480 flow [2024-06-03 20:46:33,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 591 transitions, 9110 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:46:33,612 INFO L231 Difference]: Finished difference. Result has 451 places, 576 transitions, 7927 flow [2024-06-03 20:46:33,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7653, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7927, PETRI_PLACES=451, PETRI_TRANSITIONS=576} [2024-06-03 20:46:33,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-03 20:46:33,612 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 576 transitions, 7927 flow [2024-06-03 20:46:33,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:33,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:33,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:33,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 20:46:33,613 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:33,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash -835327083, now seen corresponding path program 3 times [2024-06-03 20:46:33,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:33,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430461887] [2024-06-03 20:46:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:33,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:33,849 INFO 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 20:46:33,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:33,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430461887] [2024-06-03 20:46:33,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430461887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:33,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:33,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:33,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689488429] [2024-06-03 20:46:33,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:33,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:33,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:33,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:33,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 576 transitions, 7927 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:33,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:33,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:33,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:35,133 INFO L124 PetriNetUnfolderBase]: 3573/6120 cut-off events. [2024-06-03 20:46:35,133 INFO L125 PetriNetUnfolderBase]: For 341189/341189 co-relation queries the response was YES. [2024-06-03 20:46:35,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38238 conditions, 6120 events. 3573/6120 cut-off events. For 341189/341189 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 43227 event pairs, 697 based on Foata normal form. 1/6112 useless extension candidates. Maximal degree in co-relation 38048. Up to 5308 conditions per place. [2024-06-03 20:46:35,231 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 470 selfloop transitions, 115 changer transitions 0/592 dead transitions. [2024-06-03 20:46:35,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 592 transitions, 9135 flow [2024-06-03 20:46:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:46:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:46:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:46:35,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-03 20:46:35,232 INFO L175 Difference]: Start difference. First operand has 451 places, 576 transitions, 7927 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:46:35,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 592 transitions, 9135 flow [2024-06-03 20:46:37,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 592 transitions, 8945 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:37,819 INFO L231 Difference]: Finished difference. Result has 456 places, 576 transitions, 7978 flow [2024-06-03 20:46:37,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7737, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7978, PETRI_PLACES=456, PETRI_TRANSITIONS=576} [2024-06-03 20:46:37,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-03 20:46:37,820 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 576 transitions, 7978 flow [2024-06-03 20:46:37,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:37,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:37,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:37,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 20:46:37,820 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:37,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash -677458983, now seen corresponding path program 4 times [2024-06-03 20:46:37,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:37,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093127284] [2024-06-03 20:46:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:37,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:38,052 INFO 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 20:46:38,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:38,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093127284] [2024-06-03 20:46:38,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093127284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:38,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:38,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:38,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735890325] [2024-06-03 20:46:38,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:38,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:38,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:38,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:38,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:38,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:38,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 576 transitions, 7978 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:38,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:38,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:38,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:39,305 INFO L124 PetriNetUnfolderBase]: 3578/6129 cut-off events. [2024-06-03 20:46:39,306 INFO L125 PetriNetUnfolderBase]: For 347013/347013 co-relation queries the response was YES. [2024-06-03 20:46:39,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38373 conditions, 6129 events. 3578/6129 cut-off events. For 347013/347013 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 43307 event pairs, 694 based on Foata normal form. 1/6121 useless extension candidates. Maximal degree in co-relation 38182. Up to 5193 conditions per place. [2024-06-03 20:46:39,404 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 407 selfloop transitions, 186 changer transitions 0/600 dead transitions. [2024-06-03 20:46:39,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 600 transitions, 9471 flow [2024-06-03 20:46:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:46:39,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:46:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-03 20:46:39,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-03 20:46:39,405 INFO L175 Difference]: Start difference. First operand has 456 places, 576 transitions, 7978 flow. Second operand 10 states and 232 transitions. [2024-06-03 20:46:39,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 600 transitions, 9471 flow [2024-06-03 20:46:42,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 600 transitions, 9217 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:46:42,331 INFO L231 Difference]: Finished difference. Result has 458 places, 579 transitions, 8150 flow [2024-06-03 20:46:42,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7724, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8150, PETRI_PLACES=458, PETRI_TRANSITIONS=579} [2024-06-03 20:46:42,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-03 20:46:42,331 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 579 transitions, 8150 flow [2024-06-03 20:46:42,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:42,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:42,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:42,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 20:46:42,332 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:42,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:42,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1121441999, now seen corresponding path program 5 times [2024-06-03 20:46:42,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:42,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892835745] [2024-06-03 20:46:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:42,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:42,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:42,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892835745] [2024-06-03 20:46:42,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892835745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:42,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:42,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:42,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724960247] [2024-06-03 20:46:42,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:42,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:42,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:42,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:42,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 579 transitions, 8150 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:42,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:42,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:42,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:43,871 INFO L124 PetriNetUnfolderBase]: 3583/6138 cut-off events. [2024-06-03 20:46:43,871 INFO L125 PetriNetUnfolderBase]: For 353250/353250 co-relation queries the response was YES. [2024-06-03 20:46:43,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38674 conditions, 6138 events. 3583/6138 cut-off events. For 353250/353250 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 43385 event pairs, 697 based on Foata normal form. 1/6130 useless extension candidates. Maximal degree in co-relation 38482. Up to 5199 conditions per place. [2024-06-03 20:46:43,962 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 180 changer transitions 0/601 dead transitions. [2024-06-03 20:46:43,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 601 transitions, 9649 flow [2024-06-03 20:46:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:43,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:43,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:46:43,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:46:43,963 INFO L175 Difference]: Start difference. First operand has 458 places, 579 transitions, 8150 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:46:43,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 601 transitions, 9649 flow [2024-06-03 20:46:46,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 601 transitions, 9203 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 20:46:46,951 INFO L231 Difference]: Finished difference. Result has 457 places, 582 transitions, 8135 flow [2024-06-03 20:46:46,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7712, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8135, PETRI_PLACES=457, PETRI_TRANSITIONS=582} [2024-06-03 20:46:46,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-03 20:46:46,952 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 582 transitions, 8135 flow [2024-06-03 20:46:46,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:46,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:46,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:46,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 20:46:46,953 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:46,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash -684816213, now seen corresponding path program 6 times [2024-06-03 20:46:46,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:46,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267707115] [2024-06-03 20:46:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:46,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:47,175 INFO 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 20:46:47,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:47,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267707115] [2024-06-03 20:46:47,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267707115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:47,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:47,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:47,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412152845] [2024-06-03 20:46:47,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:47,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:47,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:47,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:47,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:47,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:47,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 582 transitions, 8135 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:47,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:47,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:47,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:48,429 INFO L124 PetriNetUnfolderBase]: 3580/6134 cut-off events. [2024-06-03 20:46:48,430 INFO L125 PetriNetUnfolderBase]: For 346724/346724 co-relation queries the response was YES. [2024-06-03 20:46:48,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38510 conditions, 6134 events. 3580/6134 cut-off events. For 346724/346724 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 43372 event pairs, 697 based on Foata normal form. 1/6126 useless extension candidates. Maximal degree in co-relation 38318. Up to 5196 conditions per place. [2024-06-03 20:46:48,525 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 427 selfloop transitions, 164 changer transitions 0/598 dead transitions. [2024-06-03 20:46:48,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 598 transitions, 9357 flow [2024-06-03 20:46:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:46:48,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-03 20:46:48,526 INFO L175 Difference]: Start difference. First operand has 457 places, 582 transitions, 8135 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:46:48,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 598 transitions, 9357 flow [2024-06-03 20:46:51,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 598 transitions, 8954 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 20:46:51,467 INFO L231 Difference]: Finished difference. Result has 455 places, 582 transitions, 8090 flow [2024-06-03 20:46:51,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7732, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8090, PETRI_PLACES=455, PETRI_TRANSITIONS=582} [2024-06-03 20:46:51,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-03 20:46:51,467 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 582 transitions, 8090 flow [2024-06-03 20:46:51,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:51,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:51,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:51,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 20:46:51,468 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:51,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2136271835, now seen corresponding path program 7 times [2024-06-03 20:46:51,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:51,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608204144] [2024-06-03 20:46:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:51,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:51,706 INFO 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 20:46:51,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:51,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608204144] [2024-06-03 20:46:51,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608204144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:51,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:51,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:51,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077035076] [2024-06-03 20:46:51,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:51,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:51,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:51,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:51,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 582 transitions, 8090 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:51,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:51,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:51,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:53,025 INFO L124 PetriNetUnfolderBase]: 3609/6187 cut-off events. [2024-06-03 20:46:53,025 INFO L125 PetriNetUnfolderBase]: For 358789/358789 co-relation queries the response was YES. [2024-06-03 20:46:53,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38920 conditions, 6187 events. 3609/6187 cut-off events. For 358789/358789 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 43805 event pairs, 685 based on Foata normal form. 1/6182 useless extension candidates. Maximal degree in co-relation 38729. Up to 4887 conditions per place. [2024-06-03 20:46:53,127 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 323 selfloop transitions, 302 changer transitions 0/632 dead transitions. [2024-06-03 20:46:53,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 632 transitions, 10016 flow [2024-06-03 20:46:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:46:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:46:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-03 20:46:53,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-03 20:46:53,130 INFO L175 Difference]: Start difference. First operand has 455 places, 582 transitions, 8090 flow. Second operand 11 states and 261 transitions. [2024-06-03 20:46:53,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 632 transitions, 10016 flow [2024-06-03 20:46:56,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 632 transitions, 9645 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:46:56,476 INFO L231 Difference]: Finished difference. Result has 459 places, 594 transitions, 8493 flow [2024-06-03 20:46:56,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7727, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8493, PETRI_PLACES=459, PETRI_TRANSITIONS=594} [2024-06-03 20:46:56,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-03 20:46:56,477 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 594 transitions, 8493 flow [2024-06-03 20:46:56,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:56,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:56,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 20:46:56,478 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:56,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash -492882551, now seen corresponding path program 8 times [2024-06-03 20:46:56,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:56,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340759335] [2024-06-03 20:46:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:56,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:56,708 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 20:46:56,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:56,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340759335] [2024-06-03 20:46:56,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340759335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:56,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:56,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:56,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922338938] [2024-06-03 20:46:56,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:56,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:56,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:56,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:56,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 594 transitions, 8493 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:56,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:56,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:56,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:57,996 INFO L124 PetriNetUnfolderBase]: 3606/6183 cut-off events. [2024-06-03 20:46:57,996 INFO L125 PetriNetUnfolderBase]: For 348928/348928 co-relation queries the response was YES. [2024-06-03 20:46:58,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39104 conditions, 6183 events. 3606/6183 cut-off events. For 348928/348928 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 43777 event pairs, 685 based on Foata normal form. 1/6178 useless extension candidates. Maximal degree in co-relation 38914. Up to 4884 conditions per place. [2024-06-03 20:46:58,093 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 278 changer transitions 0/628 dead transitions. [2024-06-03 20:46:58,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 628 transitions, 10243 flow [2024-06-03 20:46:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:46:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:46:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-03 20:46:58,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:46:58,095 INFO L175 Difference]: Start difference. First operand has 459 places, 594 transitions, 8493 flow. Second operand 10 states and 240 transitions. [2024-06-03 20:46:58,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 628 transitions, 10243 flow [2024-06-03 20:47:01,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 628 transitions, 9795 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:01,510 INFO L231 Difference]: Finished difference. Result has 462 places, 594 transitions, 8608 flow [2024-06-03 20:47:01,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8045, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8608, PETRI_PLACES=462, PETRI_TRANSITIONS=594} [2024-06-03 20:47:01,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-03 20:47:01,511 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 594 transitions, 8608 flow [2024-06-03 20:47:01,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:01,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:01,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:01,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 20:47:01,511 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:01,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1715246763, now seen corresponding path program 9 times [2024-06-03 20:47:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:01,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178402375] [2024-06-03 20:47:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:01,741 INFO 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 20:47:01,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:01,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178402375] [2024-06-03 20:47:01,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178402375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:01,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:01,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:01,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031758353] [2024-06-03 20:47:01,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:01,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:01,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:01,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:01,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:01,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:01,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 594 transitions, 8608 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:01,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:01,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:01,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:03,146 INFO L124 PetriNetUnfolderBase]: 3611/6192 cut-off events. [2024-06-03 20:47:03,146 INFO L125 PetriNetUnfolderBase]: For 356213/356213 co-relation queries the response was YES. [2024-06-03 20:47:03,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39252 conditions, 6192 events. 3611/6192 cut-off events. For 356213/356213 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 43853 event pairs, 685 based on Foata normal form. 1/6187 useless extension candidates. Maximal degree in co-relation 39061. Up to 4890 conditions per place. [2024-06-03 20:47:03,234 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 313 selfloop transitions, 313 changer transitions 0/633 dead transitions. [2024-06-03 20:47:03,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 633 transitions, 10419 flow [2024-06-03 20:47:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:47:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:47:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2024-06-03 20:47:03,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-03 20:47:03,236 INFO L175 Difference]: Start difference. First operand has 462 places, 594 transitions, 8608 flow. Second operand 12 states and 278 transitions. [2024-06-03 20:47:03,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 633 transitions, 10419 flow [2024-06-03 20:47:06,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 633 transitions, 9794 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:06,185 INFO L231 Difference]: Finished difference. Result has 467 places, 597 transitions, 8661 flow [2024-06-03 20:47:06,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7992, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8661, PETRI_PLACES=467, PETRI_TRANSITIONS=597} [2024-06-03 20:47:06,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-03 20:47:06,186 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 597 transitions, 8661 flow [2024-06-03 20:47:06,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:06,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:06,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:06,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 20:47:06,187 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:06,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:06,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1811144765, now seen corresponding path program 10 times [2024-06-03 20:47:06,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:06,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243833211] [2024-06-03 20:47:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:06,419 INFO 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 20:47:06,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:06,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243833211] [2024-06-03 20:47:06,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243833211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:06,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:06,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:06,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397946736] [2024-06-03 20:47:06,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:06,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:06,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:06,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:06,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:06,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:06,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 597 transitions, 8661 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:06,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:06,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:06,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:07,720 INFO L124 PetriNetUnfolderBase]: 3608/6188 cut-off events. [2024-06-03 20:47:07,720 INFO L125 PetriNetUnfolderBase]: For 355178/355178 co-relation queries the response was YES. [2024-06-03 20:47:07,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39229 conditions, 6188 events. 3608/6188 cut-off events. For 355178/355178 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 43782 event pairs, 685 based on Foata normal form. 1/6183 useless extension candidates. Maximal degree in co-relation 39037. Up to 4887 conditions per place. [2024-06-03 20:47:07,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 325 changer transitions 0/633 dead transitions. [2024-06-03 20:47:07,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 633 transitions, 10217 flow [2024-06-03 20:47:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:47:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:47:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 295 transitions. [2024-06-03 20:47:07,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402930402930403 [2024-06-03 20:47:07,820 INFO L175 Difference]: Start difference. First operand has 467 places, 597 transitions, 8661 flow. Second operand 13 states and 295 transitions. [2024-06-03 20:47:07,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 633 transitions, 10217 flow [2024-06-03 20:47:10,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 633 transitions, 9626 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:11,006 INFO L231 Difference]: Finished difference. Result has 472 places, 597 transitions, 8726 flow [2024-06-03 20:47:11,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8070, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8726, PETRI_PLACES=472, PETRI_TRANSITIONS=597} [2024-06-03 20:47:11,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-03 20:47:11,006 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 597 transitions, 8726 flow [2024-06-03 20:47:11,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:11,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:11,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 20:47:11,007 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:11,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash -754581303, now seen corresponding path program 11 times [2024-06-03 20:47:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:11,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412896373] [2024-06-03 20:47:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:11,265 INFO 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 20:47:11,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:11,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412896373] [2024-06-03 20:47:11,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412896373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:11,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:11,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:11,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571868919] [2024-06-03 20:47:11,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:11,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:11,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:11,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:11,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:11,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 597 transitions, 8726 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:11,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:11,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:12,592 INFO L124 PetriNetUnfolderBase]: 3621/6210 cut-off events. [2024-06-03 20:47:12,593 INFO L125 PetriNetUnfolderBase]: For 367367/367367 co-relation queries the response was YES. [2024-06-03 20:47:12,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39543 conditions, 6210 events. 3621/6210 cut-off events. For 367367/367367 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 44023 event pairs, 685 based on Foata normal form. 1/6205 useless extension candidates. Maximal degree in co-relation 39350. Up to 5331 conditions per place. [2024-06-03 20:47:12,689 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 495 selfloop transitions, 131 changer transitions 0/633 dead transitions. [2024-06-03 20:47:12,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 633 transitions, 10374 flow [2024-06-03 20:47:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-03 20:47:12,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-06-03 20:47:12,690 INFO L175 Difference]: Start difference. First operand has 472 places, 597 transitions, 8726 flow. Second operand 10 states and 233 transitions. [2024-06-03 20:47:12,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 633 transitions, 10374 flow [2024-06-03 20:47:15,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 633 transitions, 9673 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-03 20:47:15,977 INFO L231 Difference]: Finished difference. Result has 470 places, 603 transitions, 8404 flow [2024-06-03 20:47:15,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8037, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8404, PETRI_PLACES=470, PETRI_TRANSITIONS=603} [2024-06-03 20:47:15,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-03 20:47:15,978 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 603 transitions, 8404 flow [2024-06-03 20:47:15,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:15,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:15,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:15,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 20:47:15,978 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:15,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash -754575723, now seen corresponding path program 12 times [2024-06-03 20:47:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:15,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646261458] [2024-06-03 20:47:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:15,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:16,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646261458] [2024-06-03 20:47:16,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646261458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:16,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:16,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:16,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826244781] [2024-06-03 20:47:16,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:16,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:16,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:16,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:16,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:16,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 603 transitions, 8404 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:16,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:16,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:16,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:17,597 INFO L124 PetriNetUnfolderBase]: 3618/6206 cut-off events. [2024-06-03 20:47:17,597 INFO L125 PetriNetUnfolderBase]: For 365010/365010 co-relation queries the response was YES. [2024-06-03 20:47:17,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38911 conditions, 6206 events. 3618/6206 cut-off events. For 365010/365010 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 44000 event pairs, 685 based on Foata normal form. 1/6201 useless extension candidates. Maximal degree in co-relation 38717. Up to 5328 conditions per place. [2024-06-03 20:47:17,698 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 494 selfloop transitions, 133 changer transitions 0/634 dead transitions. [2024-06-03 20:47:17,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 634 transitions, 9734 flow [2024-06-03 20:47:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:47:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:47:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 266 transitions. [2024-06-03 20:47:17,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-03 20:47:17,699 INFO L175 Difference]: Start difference. First operand has 470 places, 603 transitions, 8404 flow. Second operand 12 states and 266 transitions. [2024-06-03 20:47:17,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 634 transitions, 9734 flow [2024-06-03 20:47:20,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 634 transitions, 9567 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:20,878 INFO L231 Difference]: Finished difference. Result has 476 places, 603 transitions, 8509 flow [2024-06-03 20:47:20,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8237, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8509, PETRI_PLACES=476, PETRI_TRANSITIONS=603} [2024-06-03 20:47:20,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-03 20:47:20,879 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 603 transitions, 8509 flow [2024-06-03 20:47:20,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:20,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:20,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:20,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 20:47:20,879 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:20,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:20,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1000054067, now seen corresponding path program 13 times [2024-06-03 20:47:20,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:20,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884372324] [2024-06-03 20:47:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:20,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:21,137 INFO 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 20:47:21,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:21,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884372324] [2024-06-03 20:47:21,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884372324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:21,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:21,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:21,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758660709] [2024-06-03 20:47:21,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:21,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:21,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:21,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:21,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:21,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:21,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 603 transitions, 8509 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:21,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:21,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:21,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:22,628 INFO L124 PetriNetUnfolderBase]: 3631/6228 cut-off events. [2024-06-03 20:47:22,628 INFO L125 PetriNetUnfolderBase]: For 377322/377322 co-relation queries the response was YES. [2024-06-03 20:47:22,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39445 conditions, 6228 events. 3631/6228 cut-off events. For 377322/377322 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 44146 event pairs, 685 based on Foata normal form. 1/6223 useless extension candidates. Maximal degree in co-relation 39249. Up to 5237 conditions per place. [2024-06-03 20:47:22,715 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 424 selfloop transitions, 210 changer transitions 0/641 dead transitions. [2024-06-03 20:47:22,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 641 transitions, 10392 flow [2024-06-03 20:47:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:47:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:47:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 310 transitions. [2024-06-03 20:47:22,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-03 20:47:22,716 INFO L175 Difference]: Start difference. First operand has 476 places, 603 transitions, 8509 flow. Second operand 14 states and 310 transitions. [2024-06-03 20:47:22,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 641 transitions, 10392 flow [2024-06-03 20:47:26,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 641 transitions, 10118 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 20:47:26,213 INFO L231 Difference]: Finished difference. Result has 479 places, 609 transitions, 8756 flow [2024-06-03 20:47:26,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8235, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8756, PETRI_PLACES=479, PETRI_TRANSITIONS=609} [2024-06-03 20:47:26,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-03 20:47:26,214 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 609 transitions, 8756 flow [2024-06-03 20:47:26,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:26,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:26,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:26,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 20:47:26,214 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:26,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1762495555, now seen corresponding path program 14 times [2024-06-03 20:47:26,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:26,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556645540] [2024-06-03 20:47:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:26,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:26,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:26,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556645540] [2024-06-03 20:47:26,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556645540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:26,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:26,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:26,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915933091] [2024-06-03 20:47:26,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:26,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:26,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:26,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:26,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 609 transitions, 8756 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:26,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:26,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:26,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:27,837 INFO L124 PetriNetUnfolderBase]: 3636/6237 cut-off events. [2024-06-03 20:47:27,837 INFO L125 PetriNetUnfolderBase]: For 383858/383858 co-relation queries the response was YES. [2024-06-03 20:47:27,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39732 conditions, 6237 events. 3636/6237 cut-off events. For 383858/383858 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44253 event pairs, 685 based on Foata normal form. 1/6232 useless extension candidates. Maximal degree in co-relation 39535. Up to 5243 conditions per place. [2024-06-03 20:47:27,938 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 194 changer transitions 0/641 dead transitions. [2024-06-03 20:47:27,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 641 transitions, 10591 flow [2024-06-03 20:47:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-03 20:47:27,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-03 20:47:27,939 INFO L175 Difference]: Start difference. First operand has 479 places, 609 transitions, 8756 flow. Second operand 11 states and 252 transitions. [2024-06-03 20:47:27,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 641 transitions, 10591 flow [2024-06-03 20:47:31,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 641 transitions, 10141 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-03 20:47:31,699 INFO L231 Difference]: Finished difference. Result has 479 places, 612 transitions, 8752 flow [2024-06-03 20:47:31,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8312, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8752, PETRI_PLACES=479, PETRI_TRANSITIONS=612} [2024-06-03 20:47:31,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-03 20:47:31,700 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 612 transitions, 8752 flow [2024-06-03 20:47:31,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:31,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:31,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:31,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 20:47:31,701 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:31,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:31,701 INFO L85 PathProgramCache]: Analyzing trace with hash 987882227, now seen corresponding path program 15 times [2024-06-03 20:47:31,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:31,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954643917] [2024-06-03 20:47:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:31,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:31,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:31,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954643917] [2024-06-03 20:47:31,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954643917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:31,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:31,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:31,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670676090] [2024-06-03 20:47:31,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:31,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:31,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:31,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:31,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:32,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:32,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 612 transitions, 8752 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:32,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:32,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:32,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:33,350 INFO L124 PetriNetUnfolderBase]: 3641/6246 cut-off events. [2024-06-03 20:47:33,350 INFO L125 PetriNetUnfolderBase]: For 389842/389842 co-relation queries the response was YES. [2024-06-03 20:47:33,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39804 conditions, 6246 events. 3641/6246 cut-off events. For 389842/389842 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 44361 event pairs, 685 based on Foata normal form. 1/6241 useless extension candidates. Maximal degree in co-relation 39606. Up to 5249 conditions per place. [2024-06-03 20:47:33,449 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 437 selfloop transitions, 203 changer transitions 0/647 dead transitions. [2024-06-03 20:47:33,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 647 transitions, 10618 flow [2024-06-03 20:47:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:47:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:47:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 307 transitions. [2024-06-03 20:47:33,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221088435374149 [2024-06-03 20:47:33,467 INFO L175 Difference]: Start difference. First operand has 479 places, 612 transitions, 8752 flow. Second operand 14 states and 307 transitions. [2024-06-03 20:47:33,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 647 transitions, 10618 flow [2024-06-03 20:47:37,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 647 transitions, 10313 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:37,087 INFO L231 Difference]: Finished difference. Result has 486 places, 615 transitions, 8917 flow [2024-06-03 20:47:37,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8450, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8917, PETRI_PLACES=486, PETRI_TRANSITIONS=615} [2024-06-03 20:47:37,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-03 20:47:37,088 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 615 transitions, 8917 flow [2024-06-03 20:47:37,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:37,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:37,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:37,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 20:47:37,089 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:37,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash 994691687, now seen corresponding path program 16 times [2024-06-03 20:47:37,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:37,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191145146] [2024-06-03 20:47:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:37,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:37,331 INFO 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 20:47:37,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:37,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191145146] [2024-06-03 20:47:37,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191145146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:37,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:37,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:37,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402822662] [2024-06-03 20:47:37,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:37,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:37,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:37,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:37,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:37,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 615 transitions, 8917 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:37,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:37,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:37,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:38,723 INFO L124 PetriNetUnfolderBase]: 3638/6242 cut-off events. [2024-06-03 20:47:38,723 INFO L125 PetriNetUnfolderBase]: For 390075/390075 co-relation queries the response was YES. [2024-06-03 20:47:38,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39790 conditions, 6242 events. 3638/6242 cut-off events. For 390075/390075 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 44280 event pairs, 685 based on Foata normal form. 1/6237 useless extension candidates. Maximal degree in co-relation 39591. Up to 5246 conditions per place. [2024-06-03 20:47:38,827 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 433 selfloop transitions, 204 changer transitions 0/644 dead transitions. [2024-06-03 20:47:38,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 644 transitions, 10717 flow [2024-06-03 20:47:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-03 20:47:38,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:47:38,828 INFO L175 Difference]: Start difference. First operand has 486 places, 615 transitions, 8917 flow. Second operand 11 states and 253 transitions. [2024-06-03 20:47:38,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 644 transitions, 10717 flow [2024-06-03 20:47:42,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 644 transitions, 10235 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-03 20:47:42,027 INFO L231 Difference]: Finished difference. Result has 486 places, 615 transitions, 8849 flow [2024-06-03 20:47:42,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8435, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8849, PETRI_PLACES=486, PETRI_TRANSITIONS=615} [2024-06-03 20:47:42,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-03 20:47:42,028 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 615 transitions, 8849 flow [2024-06-03 20:47:42,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:42,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:42,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:42,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-03 20:47:42,028 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:42,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash 177149777, now seen corresponding path program 17 times [2024-06-03 20:47:42,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:42,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671875996] [2024-06-03 20:47:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:42,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:42,287 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 20:47:42,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:42,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671875996] [2024-06-03 20:47:42,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671875996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:42,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:42,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869824589] [2024-06-03 20:47:42,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:42,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:42,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:42,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:42,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 615 transitions, 8849 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:42,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:42,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:42,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:43,784 INFO L124 PetriNetUnfolderBase]: 3635/6238 cut-off events. [2024-06-03 20:47:43,784 INFO L125 PetriNetUnfolderBase]: For 389358/389358 co-relation queries the response was YES. [2024-06-03 20:47:43,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39442 conditions, 6238 events. 3635/6238 cut-off events. For 389358/389358 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 44295 event pairs, 685 based on Foata normal form. 1/6233 useless extension candidates. Maximal degree in co-relation 39243. Up to 5243 conditions per place. [2024-06-03 20:47:43,873 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 442 selfloop transitions, 196 changer transitions 0/645 dead transitions. [2024-06-03 20:47:43,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 645 transitions, 10427 flow [2024-06-03 20:47:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:47:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:47:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 289 transitions. [2024-06-03 20:47:43,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5293040293040293 [2024-06-03 20:47:43,875 INFO L175 Difference]: Start difference. First operand has 486 places, 615 transitions, 8849 flow. Second operand 13 states and 289 transitions. [2024-06-03 20:47:43,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 645 transitions, 10427 flow [2024-06-03 20:47:47,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 645 transitions, 9954 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-03 20:47:47,219 INFO L231 Difference]: Finished difference. Result has 488 places, 615 transitions, 8776 flow [2024-06-03 20:47:47,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8376, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8776, PETRI_PLACES=488, PETRI_TRANSITIONS=615} [2024-06-03 20:47:47,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-03 20:47:47,220 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 615 transitions, 8776 flow [2024-06-03 20:47:47,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:47,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:47,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:47,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-03 20:47:47,220 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:47,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:47,221 INFO L85 PathProgramCache]: Analyzing trace with hash -467342433, now seen corresponding path program 18 times [2024-06-03 20:47:47,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:47,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850627163] [2024-06-03 20:47:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:47,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:47,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:47,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850627163] [2024-06-03 20:47:47,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850627163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:47,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:47,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:47,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096076718] [2024-06-03 20:47:47,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:47,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:47,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:47,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:47,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:47,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 615 transitions, 8776 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:47,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:47,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:47,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:48,895 INFO L124 PetriNetUnfolderBase]: 3632/6234 cut-off events. [2024-06-03 20:47:48,896 INFO L125 PetriNetUnfolderBase]: For 388172/388172 co-relation queries the response was YES. [2024-06-03 20:47:48,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39296 conditions, 6234 events. 3632/6234 cut-off events. For 388172/388172 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 44257 event pairs, 685 based on Foata normal form. 1/6229 useless extension candidates. Maximal degree in co-relation 39096. Up to 5240 conditions per place. [2024-06-03 20:47:48,994 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 422 selfloop transitions, 217 changer transitions 0/646 dead transitions. [2024-06-03 20:47:48,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 646 transitions, 10128 flow [2024-06-03 20:47:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:47:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:47:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 324 transitions. [2024-06-03 20:47:48,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-03 20:47:48,995 INFO L175 Difference]: Start difference. First operand has 488 places, 615 transitions, 8776 flow. Second operand 15 states and 324 transitions. [2024-06-03 20:47:48,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 646 transitions, 10128 flow [2024-06-03 20:47:52,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 646 transitions, 9674 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-03 20:47:52,367 INFO L231 Difference]: Finished difference. Result has 491 places, 615 transitions, 8762 flow [2024-06-03 20:47:52,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8322, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8762, PETRI_PLACES=491, PETRI_TRANSITIONS=615} [2024-06-03 20:47:52,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-03 20:47:52,368 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 615 transitions, 8762 flow [2024-06-03 20:47:52,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:52,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:52,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:52,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-03 20:47:52,369 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:52,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:52,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1907726299, now seen corresponding path program 19 times [2024-06-03 20:47:52,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:52,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097523651] [2024-06-03 20:47:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:52,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:52,636 INFO 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 20:47:52,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:52,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097523651] [2024-06-03 20:47:52,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097523651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:52,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:52,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:52,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336357748] [2024-06-03 20:47:52,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:52,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:52,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:52,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:52,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 615 transitions, 8762 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:52,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:52,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:52,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:54,055 INFO L124 PetriNetUnfolderBase]: 3645/6257 cut-off events. [2024-06-03 20:47:54,056 INFO L125 PetriNetUnfolderBase]: For 401267/401270 co-relation queries the response was YES. [2024-06-03 20:47:54,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39562 conditions, 6257 events. 3645/6257 cut-off events. For 401267/401270 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 44465 event pairs, 706 based on Foata normal form. 3/6252 useless extension candidates. Maximal degree in co-relation 39361. Up to 5022 conditions per place. [2024-06-03 20:47:54,157 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 316 selfloop transitions, 325 changer transitions 0/648 dead transitions. [2024-06-03 20:47:54,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 648 transitions, 10665 flow [2024-06-03 20:47:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:47:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:47:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-03 20:47:54,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337301587301587 [2024-06-03 20:47:54,158 INFO L175 Difference]: Start difference. First operand has 491 places, 615 transitions, 8762 flow. Second operand 12 states and 269 transitions. [2024-06-03 20:47:54,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 648 transitions, 10665 flow [2024-06-03 20:47:57,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 648 transitions, 10150 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-06-03 20:47:57,934 INFO L231 Difference]: Finished difference. Result has 487 places, 621 transitions, 8992 flow [2024-06-03 20:47:57,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8247, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8992, PETRI_PLACES=487, PETRI_TRANSITIONS=621} [2024-06-03 20:47:57,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-03 20:47:57,935 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 621 transitions, 8992 flow [2024-06-03 20:47:57,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:57,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:57,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:57,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-03 20:47:57,935 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:57,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1907731879, now seen corresponding path program 20 times [2024-06-03 20:47:57,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:57,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622570299] [2024-06-03 20:47:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:57,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:58,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:58,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622570299] [2024-06-03 20:47:58,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622570299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:58,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:58,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:58,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167899476] [2024-06-03 20:47:58,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:58,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:58,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:58,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:58,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:58,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:58,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 621 transitions, 8992 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:58,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:58,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:58,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:59,601 INFO L124 PetriNetUnfolderBase]: 3642/6253 cut-off events. [2024-06-03 20:47:59,601 INFO L125 PetriNetUnfolderBase]: For 401232/401235 co-relation queries the response was YES. [2024-06-03 20:47:59,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39734 conditions, 6253 events. 3642/6253 cut-off events. For 401232/401235 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 44433 event pairs, 706 based on Foata normal form. 3/6248 useless extension candidates. Maximal degree in co-relation 39532. Up to 5019 conditions per place. [2024-06-03 20:47:59,705 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 325 changer transitions 0/649 dead transitions. [2024-06-03 20:47:59,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 649 transitions, 10578 flow [2024-06-03 20:47:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:47:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:47:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 304 transitions. [2024-06-03 20:47:59,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-03 20:47:59,706 INFO L175 Difference]: Start difference. First operand has 487 places, 621 transitions, 8992 flow. Second operand 14 states and 304 transitions. [2024-06-03 20:47:59,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 649 transitions, 10578 flow [2024-06-03 20:48:03,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 649 transitions, 9890 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:03,562 INFO L231 Difference]: Finished difference. Result has 492 places, 621 transitions, 8960 flow [2024-06-03 20:48:03,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8960, PETRI_PLACES=492, PETRI_TRANSITIONS=621} [2024-06-03 20:48:03,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-03 20:48:03,562 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 621 transitions, 8960 flow [2024-06-03 20:48:03,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:03,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:03,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:03,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-03 20:48:03,563 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:03,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:03,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2035922207, now seen corresponding path program 21 times [2024-06-03 20:48:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:03,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025558234] [2024-06-03 20:48:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:03,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:03,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:03,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025558234] [2024-06-03 20:48:03,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025558234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:03,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:03,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:03,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993516851] [2024-06-03 20:48:03,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:03,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:03,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:03,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:03,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:03,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:03,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 621 transitions, 8960 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:03,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:03,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:03,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:05,243 INFO L124 PetriNetUnfolderBase]: 3655/6274 cut-off events. [2024-06-03 20:48:05,244 INFO L125 PetriNetUnfolderBase]: For 413861/413861 co-relation queries the response was YES. [2024-06-03 20:48:05,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39984 conditions, 6274 events. 3655/6274 cut-off events. For 413861/413861 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 44618 event pairs, 685 based on Foata normal form. 1/6269 useless extension candidates. Maximal degree in co-relation 39781. Up to 5034 conditions per place. [2024-06-03 20:48:05,341 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 332 changer transitions 0/660 dead transitions. [2024-06-03 20:48:05,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 660 transitions, 10923 flow [2024-06-03 20:48:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:48:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:48:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 275 transitions. [2024-06-03 20:48:05,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456349206349206 [2024-06-03 20:48:05,342 INFO L175 Difference]: Start difference. First operand has 492 places, 621 transitions, 8960 flow. Second operand 12 states and 275 transitions. [2024-06-03 20:48:05,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 660 transitions, 10923 flow [2024-06-03 20:48:09,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 660 transitions, 10252 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-03 20:48:09,588 INFO L231 Difference]: Finished difference. Result has 491 places, 627 transitions, 9064 flow [2024-06-03 20:48:09,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8301, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9064, PETRI_PLACES=491, PETRI_TRANSITIONS=627} [2024-06-03 20:48:09,589 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-03 20:48:09,589 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 627 transitions, 9064 flow [2024-06-03 20:48:09,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:09,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:09,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:09,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-03 20:48:09,590 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:09,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash -394351427, now seen corresponding path program 22 times [2024-06-03 20:48:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:09,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140950642] [2024-06-03 20:48:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:09,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:09,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:09,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140950642] [2024-06-03 20:48:09,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140950642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:09,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:09,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:09,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580974705] [2024-06-03 20:48:09,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:09,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:09,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:09,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:09,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:09,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:09,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 627 transitions, 9064 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:09,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:09,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:09,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:11,476 INFO L124 PetriNetUnfolderBase]: 3668/6296 cut-off events. [2024-06-03 20:48:11,476 INFO L125 PetriNetUnfolderBase]: For 427480/427480 co-relation queries the response was YES. [2024-06-03 20:48:11,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40287 conditions, 6296 events. 3668/6296 cut-off events. For 427480/427480 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44795 event pairs, 685 based on Foata normal form. 1/6291 useless extension candidates. Maximal degree in co-relation 40083. Up to 5049 conditions per place. [2024-06-03 20:48:11,566 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 340 changer transitions 0/667 dead transitions. [2024-06-03 20:48:11,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 667 transitions, 11047 flow [2024-06-03 20:48:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:48:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:48:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 291 transitions. [2024-06-03 20:48:11,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532967032967033 [2024-06-03 20:48:11,567 INFO L175 Difference]: Start difference. First operand has 491 places, 627 transitions, 9064 flow. Second operand 13 states and 291 transitions. [2024-06-03 20:48:11,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 667 transitions, 11047 flow [2024-06-03 20:48:15,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 667 transitions, 10355 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:15,768 INFO L231 Difference]: Finished difference. Result has 494 places, 633 transitions, 9167 flow [2024-06-03 20:48:15,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8388, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9167, PETRI_PLACES=494, PETRI_TRANSITIONS=633} [2024-06-03 20:48:15,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-03 20:48:15,769 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 633 transitions, 9167 flow [2024-06-03 20:48:15,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:15,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:15,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:15,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-03 20:48:15,769 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:15,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1174908443, now seen corresponding path program 23 times [2024-06-03 20:48:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:15,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861904248] [2024-06-03 20:48:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:16,026 INFO 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 20:48:16,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:16,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861904248] [2024-06-03 20:48:16,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861904248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:16,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:16,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904339084] [2024-06-03 20:48:16,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:16,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:16,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:16,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:16,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 633 transitions, 9167 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:16,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:16,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:16,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:17,486 INFO L124 PetriNetUnfolderBase]: 3665/6292 cut-off events. [2024-06-03 20:48:17,487 INFO L125 PetriNetUnfolderBase]: For 420111/420111 co-relation queries the response was YES. [2024-06-03 20:48:17,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40149 conditions, 6292 events. 3665/6292 cut-off events. For 420111/420111 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44715 event pairs, 685 based on Foata normal form. 1/6287 useless extension candidates. Maximal degree in co-relation 39945. Up to 5046 conditions per place. [2024-06-03 20:48:17,584 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 363 selfloop transitions, 304 changer transitions 0/674 dead transitions. [2024-06-03 20:48:17,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 674 transitions, 11083 flow [2024-06-03 20:48:17,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:17,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-03 20:48:17,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-03 20:48:17,586 INFO L175 Difference]: Start difference. First operand has 494 places, 633 transitions, 9167 flow. Second operand 11 states and 267 transitions. [2024-06-03 20:48:17,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 674 transitions, 11083 flow [2024-06-03 20:48:21,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 674 transitions, 10496 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:21,823 INFO L231 Difference]: Finished difference. Result has 495 places, 633 transitions, 9211 flow [2024-06-03 20:48:21,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8584, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9211, PETRI_PLACES=495, PETRI_TRANSITIONS=633} [2024-06-03 20:48:21,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-03 20:48:21,824 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 633 transitions, 9211 flow [2024-06-03 20:48:21,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:21,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:21,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:21,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-03 20:48:21,824 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:21,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:21,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2030559827, now seen corresponding path program 24 times [2024-06-03 20:48:21,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:21,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702683613] [2024-06-03 20:48:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:21,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:22,075 INFO 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 20:48:22,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702683613] [2024-06-03 20:48:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702683613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:22,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:22,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:22,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842704885] [2024-06-03 20:48:22,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:22,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:22,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:22,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 633 transitions, 9211 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:22,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:22,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:22,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:23,437 INFO L124 PetriNetUnfolderBase]: 3662/6288 cut-off events. [2024-06-03 20:48:23,437 INFO L125 PetriNetUnfolderBase]: For 413543/413543 co-relation queries the response was YES. [2024-06-03 20:48:23,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40046 conditions, 6288 events. 3662/6288 cut-off events. For 413543/413543 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44720 event pairs, 685 based on Foata normal form. 1/6283 useless extension candidates. Maximal degree in co-relation 39842. Up to 5043 conditions per place. [2024-06-03 20:48:23,538 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 342 selfloop transitions, 314 changer transitions 0/663 dead transitions. [2024-06-03 20:48:23,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 663 transitions, 11077 flow [2024-06-03 20:48:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-03 20:48:23,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767195767195767 [2024-06-03 20:48:23,540 INFO L175 Difference]: Start difference. First operand has 495 places, 633 transitions, 9211 flow. Second operand 9 states and 218 transitions. [2024-06-03 20:48:23,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 663 transitions, 11077 flow [2024-06-03 20:48:27,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 663 transitions, 10422 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-03 20:48:27,521 INFO L231 Difference]: Finished difference. Result has 493 places, 633 transitions, 9202 flow [2024-06-03 20:48:27,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8564, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9202, PETRI_PLACES=493, PETRI_TRANSITIONS=633} [2024-06-03 20:48:27,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-03 20:48:27,522 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 633 transitions, 9202 flow [2024-06-03 20:48:27,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:27,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:27,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:27,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-03 20:48:27,522 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:27,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:27,522 INFO L85 PathProgramCache]: Analyzing trace with hash 247294381, now seen corresponding path program 25 times [2024-06-03 20:48:27,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:27,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757264271] [2024-06-03 20:48:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:27,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:27,773 INFO 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 20:48:27,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:27,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757264271] [2024-06-03 20:48:27,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757264271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:27,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:27,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:27,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970389074] [2024-06-03 20:48:27,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:27,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:27,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:27,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:27,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 633 transitions, 9202 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:27,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:27,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:27,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:29,168 INFO L124 PetriNetUnfolderBase]: 3659/6284 cut-off events. [2024-06-03 20:48:29,168 INFO L125 PetriNetUnfolderBase]: For 400023/400023 co-relation queries the response was YES. [2024-06-03 20:48:29,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39839 conditions, 6284 events. 3659/6284 cut-off events. For 400023/400023 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44645 event pairs, 685 based on Foata normal form. 1/6279 useless extension candidates. Maximal degree in co-relation 39636. Up to 5040 conditions per place. [2024-06-03 20:48:29,271 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 344 selfloop transitions, 320 changer transitions 0/671 dead transitions. [2024-06-03 20:48:29,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 671 transitions, 10862 flow [2024-06-03 20:48:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:48:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:48:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 279 transitions. [2024-06-03 20:48:29,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 20:48:29,273 INFO L175 Difference]: Start difference. First operand has 493 places, 633 transitions, 9202 flow. Second operand 12 states and 279 transitions. [2024-06-03 20:48:29,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 671 transitions, 10862 flow [2024-06-03 20:48:33,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 671 transitions, 10204 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:33,008 INFO L231 Difference]: Finished difference. Result has 496 places, 633 transitions, 9200 flow [2024-06-03 20:48:33,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8546, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9200, PETRI_PLACES=496, PETRI_TRANSITIONS=633} [2024-06-03 20:48:33,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-03 20:48:33,009 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 633 transitions, 9200 flow [2024-06-03 20:48:33,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:33,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:33,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:33,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-03 20:48:33,010 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:33,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:33,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2030173877, now seen corresponding path program 26 times [2024-06-03 20:48:33,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:33,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409323019] [2024-06-03 20:48:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:33,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:33,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:33,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409323019] [2024-06-03 20:48:33,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409323019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:33,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:33,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:33,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033717588] [2024-06-03 20:48:33,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:33,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:33,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:33,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:33,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:33,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:33,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 633 transitions, 9200 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:33,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:33,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:33,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:34,736 INFO L124 PetriNetUnfolderBase]: 3656/6280 cut-off events. [2024-06-03 20:48:34,737 INFO L125 PetriNetUnfolderBase]: For 392660/392660 co-relation queries the response was YES. [2024-06-03 20:48:34,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39727 conditions, 6280 events. 3656/6280 cut-off events. For 392660/392660 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44684 event pairs, 685 based on Foata normal form. 1/6275 useless extension candidates. Maximal degree in co-relation 39524. Up to 5037 conditions per place. [2024-06-03 20:48:34,835 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 304 changer transitions 0/664 dead transitions. [2024-06-03 20:48:34,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 664 transitions, 10592 flow [2024-06-03 20:48:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-03 20:48:34,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:48:34,836 INFO L175 Difference]: Start difference. First operand has 496 places, 633 transitions, 9200 flow. Second operand 9 states and 219 transitions. [2024-06-03 20:48:34,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 664 transitions, 10592 flow [2024-06-03 20:48:38,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 664 transitions, 9389 flow, removed 7 selfloop flow, removed 17 redundant places. [2024-06-03 20:48:38,372 INFO L231 Difference]: Finished difference. Result has 488 places, 633 transitions, 8621 flow [2024-06-03 20:48:38,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7997, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8621, PETRI_PLACES=488, PETRI_TRANSITIONS=633} [2024-06-03 20:48:38,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-03 20:48:38,373 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 633 transitions, 8621 flow [2024-06-03 20:48:38,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:38,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:38,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:38,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-03 20:48:38,373 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:38,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1637461771, now seen corresponding path program 1 times [2024-06-03 20:48:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269767123] [2024-06-03 20:48:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:38,608 INFO 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 20:48:38,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:38,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269767123] [2024-06-03 20:48:38,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269767123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:38,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:38,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:38,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524587065] [2024-06-03 20:48:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:38,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:38,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:38,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:38,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:38,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 633 transitions, 8621 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:38,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:38,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:38,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:40,138 INFO L124 PetriNetUnfolderBase]: 3676/6316 cut-off events. [2024-06-03 20:48:40,138 INFO L125 PetriNetUnfolderBase]: For 419890/419890 co-relation queries the response was YES. [2024-06-03 20:48:40,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39575 conditions, 6316 events. 3676/6316 cut-off events. For 419890/419890 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 44918 event pairs, 685 based on Foata normal form. 6/6316 useless extension candidates. Maximal degree in co-relation 39373. Up to 5433 conditions per place. [2024-06-03 20:48:40,226 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 572 selfloop transitions, 79 changer transitions 0/658 dead transitions. [2024-06-03 20:48:40,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 658 transitions, 10063 flow [2024-06-03 20:48:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-03 20:48:40,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-06-03 20:48:40,228 INFO L175 Difference]: Start difference. First operand has 488 places, 633 transitions, 8621 flow. Second operand 10 states and 223 transitions. [2024-06-03 20:48:40,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 658 transitions, 10063 flow [2024-06-03 20:48:43,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 658 transitions, 9362 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:43,681 INFO L231 Difference]: Finished difference. Result has 488 places, 634 transitions, 8120 flow [2024-06-03 20:48:43,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7920, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8120, PETRI_PLACES=488, PETRI_TRANSITIONS=634} [2024-06-03 20:48:43,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-03 20:48:43,682 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 634 transitions, 8120 flow [2024-06-03 20:48:43,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:43,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:43,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:43,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-03 20:48:43,682 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:43,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:43,682 INFO L85 PathProgramCache]: Analyzing trace with hash 496421973, now seen corresponding path program 2 times [2024-06-03 20:48:43,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:43,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308549692] [2024-06-03 20:48:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:43,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:43,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:43,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308549692] [2024-06-03 20:48:43,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308549692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:43,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:43,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:43,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229837834] [2024-06-03 20:48:43,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:43,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:43,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:43,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:43,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:43,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:43,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 634 transitions, 8120 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:43,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:43,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:43,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:45,300 INFO L124 PetriNetUnfolderBase]: 3729/6413 cut-off events. [2024-06-03 20:48:45,300 INFO L125 PetriNetUnfolderBase]: For 463029/463029 co-relation queries the response was YES. [2024-06-03 20:48:45,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40490 conditions, 6413 events. 3729/6413 cut-off events. For 463029/463029 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 45770 event pairs, 671 based on Foata normal form. 6/6413 useless extension candidates. Maximal degree in co-relation 40288. Up to 5089 conditions per place. [2024-06-03 20:48:45,398 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 570 selfloop transitions, 87 changer transitions 0/664 dead transitions. [2024-06-03 20:48:45,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 664 transitions, 9890 flow [2024-06-03 20:48:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-03 20:48:45,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-03 20:48:45,399 INFO L175 Difference]: Start difference. First operand has 488 places, 634 transitions, 8120 flow. Second operand 9 states and 209 transitions. [2024-06-03 20:48:45,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 664 transitions, 9890 flow [2024-06-03 20:48:48,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 664 transitions, 9704 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:48,363 INFO L231 Difference]: Finished difference. Result has 489 places, 636 transitions, 8190 flow [2024-06-03 20:48:48,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7934, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8190, PETRI_PLACES=489, PETRI_TRANSITIONS=636} [2024-06-03 20:48:48,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-03 20:48:48,364 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 636 transitions, 8190 flow [2024-06-03 20:48:48,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:48,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:48,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:48,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-03 20:48:48,365 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:48,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:48,365 INFO L85 PathProgramCache]: Analyzing trace with hash 496688883, now seen corresponding path program 3 times [2024-06-03 20:48:48,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:48,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549117074] [2024-06-03 20:48:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:48,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:48,601 INFO 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 20:48:48,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:48,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549117074] [2024-06-03 20:48:48,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549117074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:48,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:48,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:48,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176787753] [2024-06-03 20:48:48,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:48,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:48,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:48,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:48,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:48,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:48,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 636 transitions, 8190 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:48,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:48,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:48,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:49,995 INFO L124 PetriNetUnfolderBase]: 3716/6384 cut-off events. [2024-06-03 20:48:49,996 INFO L125 PetriNetUnfolderBase]: For 427385/427385 co-relation queries the response was YES. [2024-06-03 20:48:50,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39671 conditions, 6384 events. 3716/6384 cut-off events. For 427385/427385 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 45459 event pairs, 673 based on Foata normal form. 6/6384 useless extension candidates. Maximal degree in co-relation 39468. Up to 5083 conditions per place. [2024-06-03 20:48:50,279 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 572 selfloop transitions, 83 changer transitions 0/662 dead transitions. [2024-06-03 20:48:50,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 662 transitions, 9626 flow [2024-06-03 20:48:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-03 20:48:50,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-03 20:48:50,280 INFO L175 Difference]: Start difference. First operand has 489 places, 636 transitions, 8190 flow. Second operand 9 states and 206 transitions. [2024-06-03 20:48:50,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 662 transitions, 9626 flow [2024-06-03 20:48:53,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 662 transitions, 9461 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:53,016 INFO L231 Difference]: Finished difference. Result has 493 places, 636 transitions, 8195 flow [2024-06-03 20:48:53,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8025, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8195, PETRI_PLACES=493, PETRI_TRANSITIONS=636} [2024-06-03 20:48:53,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-03 20:48:53,017 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 636 transitions, 8195 flow [2024-06-03 20:48:53,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:53,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:53,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-03 20:48:53,018 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:53,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1740418413, now seen corresponding path program 4 times [2024-06-03 20:48:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:53,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860033288] [2024-06-03 20:48:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:53,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860033288] [2024-06-03 20:48:53,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860033288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:53,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:53,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:53,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437704450] [2024-06-03 20:48:53,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:53,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:53,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:53,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:53,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 636 transitions, 8195 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:53,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:53,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:54,894 INFO L124 PetriNetUnfolderBase]: 3736/6422 cut-off events. [2024-06-03 20:48:54,894 INFO L125 PetriNetUnfolderBase]: For 432941/432941 co-relation queries the response was YES. [2024-06-03 20:48:54,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40046 conditions, 6422 events. 3736/6422 cut-off events. For 432941/432941 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 45860 event pairs, 691 based on Foata normal form. 6/6422 useless extension candidates. Maximal degree in co-relation 39841. Up to 5293 conditions per place. [2024-06-03 20:48:54,986 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 530 selfloop transitions, 135 changer transitions 0/672 dead transitions. [2024-06-03 20:48:54,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 672 transitions, 9699 flow [2024-06-03 20:48:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-03 20:48:54,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:48:54,987 INFO L175 Difference]: Start difference. First operand has 493 places, 636 transitions, 8195 flow. Second operand 9 states and 219 transitions. [2024-06-03 20:48:54,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 672 transitions, 9699 flow [2024-06-03 20:48:59,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 672 transitions, 9516 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:59,144 INFO L231 Difference]: Finished difference. Result has 494 places, 637 transitions, 8330 flow [2024-06-03 20:48:59,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8012, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8330, PETRI_PLACES=494, PETRI_TRANSITIONS=637} [2024-06-03 20:48:59,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-03 20:48:59,145 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 637 transitions, 8330 flow [2024-06-03 20:48:59,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:59,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:59,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:59,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-03 20:48:59,145 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:59,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:59,146 INFO L85 PathProgramCache]: Analyzing trace with hash 839328409, now seen corresponding path program 5 times [2024-06-03 20:48:59,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:59,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312718459] [2024-06-03 20:48:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:59,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:59,392 INFO 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 20:48:59,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:59,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312718459] [2024-06-03 20:48:59,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312718459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:59,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:59,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:59,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749250638] [2024-06-03 20:48:59,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:59,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:59,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:59,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:59,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:59,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 637 transitions, 8330 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:59,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:59,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:59,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:01,196 INFO L124 PetriNetUnfolderBase]: 3756/6462 cut-off events. [2024-06-03 20:49:01,197 INFO L125 PetriNetUnfolderBase]: For 442111/442114 co-relation queries the response was YES. [2024-06-03 20:49:01,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40510 conditions, 6462 events. 3756/6462 cut-off events. For 442111/442114 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 46249 event pairs, 708 based on Foata normal form. 8/6459 useless extension candidates. Maximal degree in co-relation 40304. Up to 5481 conditions per place. [2024-06-03 20:49:01,397 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 539 selfloop transitions, 134 changer transitions 0/680 dead transitions. [2024-06-03 20:49:01,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 680 transitions, 9870 flow [2024-06-03 20:49:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-03 20:49:01,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-03 20:49:01,399 INFO L175 Difference]: Start difference. First operand has 494 places, 637 transitions, 8330 flow. Second operand 10 states and 246 transitions. [2024-06-03 20:49:01,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 680 transitions, 9870 flow [2024-06-03 20:49:04,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 680 transitions, 9568 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:04,509 INFO L231 Difference]: Finished difference. Result has 497 places, 638 transitions, 8344 flow [2024-06-03 20:49:04,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8030, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8344, PETRI_PLACES=497, PETRI_TRANSITIONS=638} [2024-06-03 20:49:04,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-03 20:49:04,509 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 638 transitions, 8344 flow [2024-06-03 20:49:04,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:04,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:04,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:04,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-03 20:49:04,510 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:04,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:04,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1475577189, now seen corresponding path program 6 times [2024-06-03 20:49:04,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:04,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146928043] [2024-06-03 20:49:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:04,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:04,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:04,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146928043] [2024-06-03 20:49:04,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146928043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:04,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:04,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:04,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912915385] [2024-06-03 20:49:04,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:04,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:04,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:04,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:04,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:04,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 638 transitions, 8344 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:04,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:04,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:04,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:06,479 INFO L124 PetriNetUnfolderBase]: 3776/6494 cut-off events. [2024-06-03 20:49:06,479 INFO L125 PetriNetUnfolderBase]: For 441662/441665 co-relation queries the response was YES. [2024-06-03 20:49:06,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40598 conditions, 6494 events. 3776/6494 cut-off events. For 441662/441665 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 46383 event pairs, 704 based on Foata normal form. 8/6491 useless extension candidates. Maximal degree in co-relation 40391. Up to 5221 conditions per place. [2024-06-03 20:49:06,581 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 515 selfloop transitions, 153 changer transitions 0/675 dead transitions. [2024-06-03 20:49:06,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 675 transitions, 9858 flow [2024-06-03 20:49:06,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-03 20:49:06,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:49:06,583 INFO L175 Difference]: Start difference. First operand has 497 places, 638 transitions, 8344 flow. Second operand 9 states and 219 transitions. [2024-06-03 20:49:06,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 675 transitions, 9858 flow [2024-06-03 20:49:09,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 675 transitions, 9570 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:09,763 INFO L231 Difference]: Finished difference. Result has 498 places, 639 transitions, 8410 flow [2024-06-03 20:49:09,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8056, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8410, PETRI_PLACES=498, PETRI_TRANSITIONS=639} [2024-06-03 20:49:09,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-03 20:49:09,776 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 639 transitions, 8410 flow [2024-06-03 20:49:09,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:09,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:09,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:09,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-03 20:49:09,778 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:09,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash -675180505, now seen corresponding path program 7 times [2024-06-03 20:49:09,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:09,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864382308] [2024-06-03 20:49:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:10,030 INFO 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 20:49:10,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:10,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864382308] [2024-06-03 20:49:10,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864382308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:10,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:10,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:10,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456233053] [2024-06-03 20:49:10,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:10,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:10,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:10,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:10,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 639 transitions, 8410 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:10,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:10,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:10,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:11,746 INFO L124 PetriNetUnfolderBase]: 3829/6600 cut-off events. [2024-06-03 20:49:11,747 INFO L125 PetriNetUnfolderBase]: For 496919/496919 co-relation queries the response was YES. [2024-06-03 20:49:11,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42287 conditions, 6600 events. 3829/6600 cut-off events. For 496919/496919 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 47334 event pairs, 569 based on Foata normal form. 6/6600 useless extension candidates. Maximal degree in co-relation 42080. Up to 4328 conditions per place. [2024-06-03 20:49:11,983 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 518 selfloop transitions, 148 changer transitions 0/673 dead transitions. [2024-06-03 20:49:11,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 673 transitions, 10216 flow [2024-06-03 20:49:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:49:11,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-03 20:49:11,985 INFO L175 Difference]: Start difference. First operand has 498 places, 639 transitions, 8410 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:49:11,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 673 transitions, 10216 flow [2024-06-03 20:49:15,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 673 transitions, 9919 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:15,681 INFO L231 Difference]: Finished difference. Result has 500 places, 641 transitions, 8506 flow [2024-06-03 20:49:15,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8113, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8506, PETRI_PLACES=500, PETRI_TRANSITIONS=641} [2024-06-03 20:49:15,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-03 20:49:15,682 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 641 transitions, 8506 flow [2024-06-03 20:49:15,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:15,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:15,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:15,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-03 20:49:15,682 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:15,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:15,683 INFO L85 PathProgramCache]: Analyzing trace with hash 674486665, now seen corresponding path program 8 times [2024-06-03 20:49:15,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:15,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245424013] [2024-06-03 20:49:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:15,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:15,917 INFO 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 20:49:15,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:15,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245424013] [2024-06-03 20:49:15,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245424013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:15,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:15,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:15,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323482314] [2024-06-03 20:49:15,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:15,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:15,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:15,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:15,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 641 transitions, 8506 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:15,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:15,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:15,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:17,673 INFO L124 PetriNetUnfolderBase]: 3816/6594 cut-off events. [2024-06-03 20:49:17,673 INFO L125 PetriNetUnfolderBase]: For 460443/460443 co-relation queries the response was YES. [2024-06-03 20:49:17,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41542 conditions, 6594 events. 3816/6594 cut-off events. For 460443/460443 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 47510 event pairs, 574 based on Foata normal form. 6/6594 useless extension candidates. Maximal degree in co-relation 41334. Up to 4322 conditions per place. [2024-06-03 20:49:17,769 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 512 selfloop transitions, 157 changer transitions 0/676 dead transitions. [2024-06-03 20:49:17,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 676 transitions, 10008 flow [2024-06-03 20:49:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 20:49:17,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:49:17,770 INFO L175 Difference]: Start difference. First operand has 500 places, 641 transitions, 8506 flow. Second operand 8 states and 200 transitions. [2024-06-03 20:49:17,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 676 transitions, 10008 flow [2024-06-03 20:49:20,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 676 transitions, 9748 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:20,888 INFO L231 Difference]: Finished difference. Result has 503 places, 641 transitions, 8566 flow [2024-06-03 20:49:20,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8566, PETRI_PLACES=503, PETRI_TRANSITIONS=641} [2024-06-03 20:49:20,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-03 20:49:20,889 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 641 transitions, 8566 flow [2024-06-03 20:49:20,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:20,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:20,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:20,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-03 20:49:20,890 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:20,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:20,890 INFO L85 PathProgramCache]: Analyzing trace with hash -25812327, now seen corresponding path program 9 times [2024-06-03 20:49:20,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:20,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689333429] [2024-06-03 20:49:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:20,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:21,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:21,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689333429] [2024-06-03 20:49:21,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689333429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:21,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:21,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:21,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143543822] [2024-06-03 20:49:21,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:21,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:21,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:21,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:21,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:21,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:21,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 641 transitions, 8566 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:21,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:21,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:21,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:22,852 INFO L124 PetriNetUnfolderBase]: 3869/6671 cut-off events. [2024-06-03 20:49:22,852 INFO L125 PetriNetUnfolderBase]: For 507016/507019 co-relation queries the response was YES. [2024-06-03 20:49:22,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43540 conditions, 6671 events. 3869/6671 cut-off events. For 507016/507019 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 48069 event pairs, 639 based on Foata normal form. 8/6671 useless extension candidates. Maximal degree in co-relation 43331. Up to 4161 conditions per place. [2024-06-03 20:49:22,964 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 520 selfloop transitions, 149 changer transitions 0/676 dead transitions. [2024-06-03 20:49:22,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 676 transitions, 10644 flow [2024-06-03 20:49:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:49:22,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-03 20:49:22,966 INFO L175 Difference]: Start difference. First operand has 503 places, 641 transitions, 8566 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:49:22,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 676 transitions, 10644 flow [2024-06-03 20:49:27,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 676 transitions, 10299 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:27,313 INFO L231 Difference]: Finished difference. Result has 503 places, 643 transitions, 8615 flow [2024-06-03 20:49:27,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8225, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8615, PETRI_PLACES=503, PETRI_TRANSITIONS=643} [2024-06-03 20:49:27,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-03 20:49:27,313 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 643 transitions, 8615 flow [2024-06-03 20:49:27,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:27,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:27,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:27,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-03 20:49:27,314 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:27,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash -25545417, now seen corresponding path program 10 times [2024-06-03 20:49:27,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:27,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476423634] [2024-06-03 20:49:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:27,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:27,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476423634] [2024-06-03 20:49:27,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476423634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:27,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:27,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965194842] [2024-06-03 20:49:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:27,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:27,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:27,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:27,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 643 transitions, 8615 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:27,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:27,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:27,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:29,278 INFO L124 PetriNetUnfolderBase]: 3856/6652 cut-off events. [2024-06-03 20:49:29,279 INFO L125 PetriNetUnfolderBase]: For 461385/461388 co-relation queries the response was YES. [2024-06-03 20:49:29,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42458 conditions, 6652 events. 3856/6652 cut-off events. For 461385/461388 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 47945 event pairs, 639 based on Foata normal form. 8/6652 useless extension candidates. Maximal degree in co-relation 42249. Up to 4155 conditions per place. [2024-06-03 20:49:29,375 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 515 selfloop transitions, 151 changer transitions 0/673 dead transitions. [2024-06-03 20:49:29,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 673 transitions, 10329 flow [2024-06-03 20:49:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:49:29,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:49:29,377 INFO L175 Difference]: Start difference. First operand has 503 places, 643 transitions, 8615 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:49:29,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 673 transitions, 10329 flow [2024-06-03 20:49:33,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 673 transitions, 9808 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:33,300 INFO L231 Difference]: Finished difference. Result has 505 places, 643 transitions, 8400 flow [2024-06-03 20:49:33,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8094, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8400, PETRI_PLACES=505, PETRI_TRANSITIONS=643} [2024-06-03 20:49:33,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-03 20:49:33,301 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 643 transitions, 8400 flow [2024-06-03 20:49:33,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:33,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:33,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:33,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-03 20:49:33,302 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:33,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:33,302 INFO L85 PathProgramCache]: Analyzing trace with hash -232465767, now seen corresponding path program 11 times [2024-06-03 20:49:33,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:33,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986063282] [2024-06-03 20:49:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:33,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:33,533 INFO 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 20:49:33,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:33,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986063282] [2024-06-03 20:49:33,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986063282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:33,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:33,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:33,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629237714] [2024-06-03 20:49:33,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:33,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:33,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:33,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:33,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 643 transitions, 8400 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:33,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:33,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:33,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:35,233 INFO L124 PetriNetUnfolderBase]: 3843/6646 cut-off events. [2024-06-03 20:49:35,233 INFO L125 PetriNetUnfolderBase]: For 416841/416844 co-relation queries the response was YES. [2024-06-03 20:49:35,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40026 conditions, 6646 events. 3843/6646 cut-off events. For 416841/416844 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 47914 event pairs, 572 based on Foata normal form. 8/6646 useless extension candidates. Maximal degree in co-relation 39818. Up to 4149 conditions per place. [2024-06-03 20:49:35,336 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 503 selfloop transitions, 166 changer transitions 0/676 dead transitions. [2024-06-03 20:49:35,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 676 transitions, 9896 flow [2024-06-03 20:49:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 20:49:35,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-03 20:49:35,337 INFO L175 Difference]: Start difference. First operand has 505 places, 643 transitions, 8400 flow. Second operand 8 states and 197 transitions. [2024-06-03 20:49:35,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 676 transitions, 9896 flow [2024-06-03 20:49:39,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 676 transitions, 9570 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:39,964 INFO L231 Difference]: Finished difference. Result has 507 places, 643 transitions, 8410 flow [2024-06-03 20:49:39,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8074, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8410, PETRI_PLACES=507, PETRI_TRANSITIONS=643} [2024-06-03 20:49:39,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-03 20:49:39,965 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 643 transitions, 8410 flow [2024-06-03 20:49:39,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:39,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:39,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:39,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-03 20:49:39,966 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:39,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash -60916723, now seen corresponding path program 1 times [2024-06-03 20:49:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:39,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900510402] [2024-06-03 20:49:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:39,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:40,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:40,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900510402] [2024-06-03 20:49:40,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900510402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:40,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:40,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:40,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854783621] [2024-06-03 20:49:40,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:40,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:40,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:40,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:40,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:40,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 643 transitions, 8410 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:49:40,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:40,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:40,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:42,329 INFO L124 PetriNetUnfolderBase]: 4183/7182 cut-off events. [2024-06-03 20:49:42,329 INFO L125 PetriNetUnfolderBase]: For 930052/930052 co-relation queries the response was YES. [2024-06-03 20:49:42,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51327 conditions, 7182 events. 4183/7182 cut-off events. For 930052/930052 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 51722 event pairs, 749 based on Foata normal form. 6/7173 useless extension candidates. Maximal degree in co-relation 51118. Up to 5144 conditions per place. [2024-06-03 20:49:42,443 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 111 changer transitions 0/698 dead transitions. [2024-06-03 20:49:42,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 698 transitions, 10664 flow [2024-06-03 20:49:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-03 20:49:42,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6243386243386243 [2024-06-03 20:49:42,445 INFO L175 Difference]: Start difference. First operand has 507 places, 643 transitions, 8410 flow. Second operand 9 states and 236 transitions. [2024-06-03 20:49:42,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 698 transitions, 10664 flow [2024-06-03 20:49:49,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 698 transitions, 10292 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:49,031 INFO L231 Difference]: Finished difference. Result has 508 places, 646 transitions, 8386 flow [2024-06-03 20:49:49,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8050, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8386, PETRI_PLACES=508, PETRI_TRANSITIONS=646} [2024-06-03 20:49:49,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-03 20:49:49,034 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 646 transitions, 8386 flow [2024-06-03 20:49:49,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:49:49,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:49,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:49,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-03 20:49:49,035 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:49,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:49,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1579021109, now seen corresponding path program 1 times [2024-06-03 20:49:49,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:49,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957286438] [2024-06-03 20:49:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:49,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:49,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:49,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957286438] [2024-06-03 20:49:49,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957286438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:49,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:49,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:49,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992335807] [2024-06-03 20:49:49,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:49,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:49,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:49,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:49,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 646 transitions, 8386 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:49,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:49,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:49,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:51,195 INFO L124 PetriNetUnfolderBase]: 4323/7423 cut-off events. [2024-06-03 20:49:51,196 INFO L125 PetriNetUnfolderBase]: For 1017699/1017699 co-relation queries the response was YES. [2024-06-03 20:49:51,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54064 conditions, 7423 events. 4323/7423 cut-off events. For 1017699/1017699 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 53808 event pairs, 670 based on Foata normal form. 6/7420 useless extension candidates. Maximal degree in co-relation 53854. Up to 5907 conditions per place. [2024-06-03 20:49:51,320 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 562 selfloop transitions, 118 changer transitions 0/687 dead transitions. [2024-06-03 20:49:51,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 687 transitions, 10515 flow [2024-06-03 20:49:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 20:49:51,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:49:51,322 INFO L175 Difference]: Start difference. First operand has 508 places, 646 transitions, 8386 flow. Second operand 8 states and 200 transitions. [2024-06-03 20:49:51,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 687 transitions, 10515 flow [2024-06-03 20:49:58,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 687 transitions, 10369 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:58,126 INFO L231 Difference]: Finished difference. Result has 514 places, 652 transitions, 8670 flow [2024-06-03 20:49:58,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8242, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8670, PETRI_PLACES=514, PETRI_TRANSITIONS=652} [2024-06-03 20:49:58,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-03 20:49:58,127 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 652 transitions, 8670 flow [2024-06-03 20:49:58,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:58,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:58,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:58,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-03 20:49:58,128 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:58,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:58,128 INFO L85 PathProgramCache]: Analyzing trace with hash 396287053, now seen corresponding path program 2 times [2024-06-03 20:49:58,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:58,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071598173] [2024-06-03 20:49:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:58,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:58,412 INFO 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 20:49:58,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:58,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071598173] [2024-06-03 20:49:58,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071598173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:58,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:58,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:58,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809747564] [2024-06-03 20:49:58,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:58,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:58,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:58,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:58,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:58,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 652 transitions, 8670 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:58,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:58,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:58,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:00,578 INFO L124 PetriNetUnfolderBase]: 4343/7465 cut-off events. [2024-06-03 20:50:00,578 INFO L125 PetriNetUnfolderBase]: For 1039674/1039674 co-relation queries the response was YES. [2024-06-03 20:50:00,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54944 conditions, 7465 events. 4343/7465 cut-off events. For 1039674/1039674 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 54067 event pairs, 829 based on Foata normal form. 6/7466 useless extension candidates. Maximal degree in co-relation 54730. Up to 6412 conditions per place. [2024-06-03 20:50:00,697 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 631 selfloop transitions, 62 changer transitions 0/700 dead transitions. [2024-06-03 20:50:00,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 700 transitions, 10274 flow [2024-06-03 20:50:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-03 20:50:00,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-03 20:50:00,699 INFO L175 Difference]: Start difference. First operand has 514 places, 652 transitions, 8670 flow. Second operand 10 states and 244 transitions. [2024-06-03 20:50:00,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 700 transitions, 10274 flow [2024-06-03 20:50:06,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 700 transitions, 10151 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-03 20:50:06,921 INFO L231 Difference]: Finished difference. Result has 522 places, 653 transitions, 8705 flow [2024-06-03 20:50:06,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8547, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8705, PETRI_PLACES=522, PETRI_TRANSITIONS=653} [2024-06-03 20:50:06,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 479 predicate places. [2024-06-03 20:50:06,922 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 653 transitions, 8705 flow [2024-06-03 20:50:06,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:06,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:06,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:06,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-03 20:50:06,923 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:06,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1401652439, now seen corresponding path program 2 times [2024-06-03 20:50:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:06,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862153628] [2024-06-03 20:50:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:07,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:07,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862153628] [2024-06-03 20:50:07,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862153628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:07,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:07,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:07,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896309414] [2024-06-03 20:50:07,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:07,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:07,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:07,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:07,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:07,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:07,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 653 transitions, 8705 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:07,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:07,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:07,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:09,260 INFO L124 PetriNetUnfolderBase]: 4445/7615 cut-off events. [2024-06-03 20:50:09,261 INFO L125 PetriNetUnfolderBase]: For 1150965/1150965 co-relation queries the response was YES. [2024-06-03 20:50:09,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57906 conditions, 7615 events. 4445/7615 cut-off events. For 1150965/1150965 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 55204 event pairs, 721 based on Foata normal form. 6/7612 useless extension candidates. Maximal degree in co-relation 57690. Up to 5995 conditions per place. [2024-06-03 20:50:09,387 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 564 selfloop transitions, 120 changer transitions 0/691 dead transitions. [2024-06-03 20:50:09,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 691 transitions, 10867 flow [2024-06-03 20:50:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:50:09,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-03 20:50:09,389 INFO L175 Difference]: Start difference. First operand has 522 places, 653 transitions, 8705 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:50:09,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 691 transitions, 10867 flow [2024-06-03 20:50:17,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 691 transitions, 10669 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-03 20:50:17,692 INFO L231 Difference]: Finished difference. Result has 521 places, 660 transitions, 8931 flow [2024-06-03 20:50:17,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8519, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8931, PETRI_PLACES=521, PETRI_TRANSITIONS=660} [2024-06-03 20:50:17,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-03 20:50:17,693 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 660 transitions, 8931 flow [2024-06-03 20:50:17,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:17,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:17,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:17,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-03 20:50:17,694 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:17,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:17,694 INFO L85 PathProgramCache]: Analyzing trace with hash 573418759, now seen corresponding path program 3 times [2024-06-03 20:50:17,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:17,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958661832] [2024-06-03 20:50:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:17,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:17,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:17,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958661832] [2024-06-03 20:50:17,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958661832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:17,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:17,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:17,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778856098] [2024-06-03 20:50:17,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:17,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:17,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:17,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:17,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 660 transitions, 8931 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:17,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:17,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:17,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:19,983 INFO L124 PetriNetUnfolderBase]: 4432/7606 cut-off events. [2024-06-03 20:50:19,984 INFO L125 PetriNetUnfolderBase]: For 1121171/1121171 co-relation queries the response was YES. [2024-06-03 20:50:20,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57151 conditions, 7606 events. 4432/7606 cut-off events. For 1121171/1121171 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 55300 event pairs, 711 based on Foata normal form. 6/7603 useless extension candidates. Maximal degree in co-relation 56936. Up to 5989 conditions per place. [2024-06-03 20:50:20,101 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 568 selfloop transitions, 118 changer transitions 0/693 dead transitions. [2024-06-03 20:50:20,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 693 transitions, 10953 flow [2024-06-03 20:50:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:50:20,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:50:20,102 INFO L175 Difference]: Start difference. First operand has 521 places, 660 transitions, 8931 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:50:20,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 693 transitions, 10953 flow [2024-06-03 20:50:28,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 693 transitions, 10738 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 20:50:28,928 INFO L231 Difference]: Finished difference. Result has 526 places, 660 transitions, 8956 flow [2024-06-03 20:50:28,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8716, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8956, PETRI_PLACES=526, PETRI_TRANSITIONS=660} [2024-06-03 20:50:28,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-03 20:50:28,929 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 660 transitions, 8956 flow [2024-06-03 20:50:28,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:28,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:28,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:28,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-03 20:50:28,929 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:28,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1261770389, now seen corresponding path program 3 times [2024-06-03 20:50:28,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:28,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035910518] [2024-06-03 20:50:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:28,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:29,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:29,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035910518] [2024-06-03 20:50:29,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035910518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:29,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:29,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:29,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279872955] [2024-06-03 20:50:29,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:29,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:29,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:29,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:29,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:29,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 660 transitions, 8956 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:29,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:29,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:29,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:31,352 INFO L124 PetriNetUnfolderBase]: 4485/7703 cut-off events. [2024-06-03 20:50:31,353 INFO L125 PetriNetUnfolderBase]: For 1191181/1191181 co-relation queries the response was YES. [2024-06-03 20:50:31,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58665 conditions, 7703 events. 4485/7703 cut-off events. For 1191181/1191181 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 56010 event pairs, 859 based on Foata normal form. 6/7704 useless extension candidates. Maximal degree in co-relation 58449. Up to 6565 conditions per place. [2024-06-03 20:50:31,476 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 633 selfloop transitions, 68 changer transitions 0/708 dead transitions. [2024-06-03 20:50:31,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 708 transitions, 10852 flow [2024-06-03 20:50:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-03 20:50:31,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-03 20:50:31,477 INFO L175 Difference]: Start difference. First operand has 526 places, 660 transitions, 8956 flow. Second operand 11 states and 258 transitions. [2024-06-03 20:50:31,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 708 transitions, 10852 flow [2024-06-03 20:50:40,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 708 transitions, 10679 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:50:40,419 INFO L231 Difference]: Finished difference. Result has 535 places, 662 transitions, 8997 flow [2024-06-03 20:50:40,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8783, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8997, PETRI_PLACES=535, PETRI_TRANSITIONS=662} [2024-06-03 20:50:40,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 492 predicate places. [2024-06-03 20:50:40,420 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 662 transitions, 8997 flow [2024-06-03 20:50:40,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:40,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:40,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:40,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-03 20:50:40,421 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:40,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1320275107, now seen corresponding path program 4 times [2024-06-03 20:50:40,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:40,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134658087] [2024-06-03 20:50:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:40,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:40,684 INFO 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 20:50:40,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:40,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134658087] [2024-06-03 20:50:40,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134658087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:40,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:40,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:40,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854772816] [2024-06-03 20:50:40,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:40,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:40,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:40,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:40,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:40,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:40,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 662 transitions, 8997 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:50:40,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:40,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:40,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:43,032 INFO L124 PetriNetUnfolderBase]: 4652/7982 cut-off events. [2024-06-03 20:50:43,032 INFO L125 PetriNetUnfolderBase]: For 1459922/1459922 co-relation queries the response was YES. [2024-06-03 20:50:43,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64153 conditions, 7982 events. 4652/7982 cut-off events. For 1459922/1459922 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 58333 event pairs, 1044 based on Foata normal form. 6/7971 useless extension candidates. Maximal degree in co-relation 63935. Up to 6144 conditions per place. [2024-06-03 20:50:43,154 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 597 selfloop transitions, 104 changer transitions 0/708 dead transitions. [2024-06-03 20:50:43,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 708 transitions, 11203 flow [2024-06-03 20:50:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-03 20:50:43,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-03 20:50:43,156 INFO L175 Difference]: Start difference. First operand has 535 places, 662 transitions, 8997 flow. Second operand 8 states and 209 transitions. [2024-06-03 20:50:43,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 708 transitions, 11203 flow [2024-06-03 20:50:51,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 708 transitions, 10973 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-03 20:50:51,383 INFO L231 Difference]: Finished difference. Result has 533 places, 664 transitions, 9055 flow [2024-06-03 20:50:51,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8767, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9055, PETRI_PLACES=533, PETRI_TRANSITIONS=664} [2024-06-03 20:50:51,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 490 predicate places. [2024-06-03 20:50:51,383 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 664 transitions, 9055 flow [2024-06-03 20:50:51,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:50:51,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:51,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:51,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-03 20:50:51,384 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:51,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:51,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1268121433, now seen corresponding path program 5 times [2024-06-03 20:50:51,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:51,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126549076] [2024-06-03 20:50:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:51,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:51,658 INFO 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 20:50:51,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:51,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126549076] [2024-06-03 20:50:51,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126549076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:51,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:51,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:51,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409047215] [2024-06-03 20:50:51,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:51,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:51,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:51,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:51,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:51,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:51,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 664 transitions, 9055 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:50:51,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:51,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:51,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:53,728 INFO L124 PetriNetUnfolderBase]: 4639/7961 cut-off events. [2024-06-03 20:50:53,728 INFO L125 PetriNetUnfolderBase]: For 1429878/1429878 co-relation queries the response was YES. [2024-06-03 20:50:53,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63226 conditions, 7961 events. 4639/7961 cut-off events. For 1429878/1429878 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 58222 event pairs, 1142 based on Foata normal form. 6/7960 useless extension candidates. Maximal degree in co-relation 63009. Up to 7020 conditions per place. [2024-06-03 20:50:54,035 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 624 selfloop transitions, 65 changer transitions 0/696 dead transitions. [2024-06-03 20:50:54,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 696 transitions, 10557 flow [2024-06-03 20:50:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:50:54,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-03 20:50:54,036 INFO L175 Difference]: Start difference. First operand has 533 places, 664 transitions, 9055 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:50:54,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 696 transitions, 10557 flow [2024-06-03 20:51:02,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 696 transitions, 10294 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:02,534 INFO L231 Difference]: Finished difference. Result has 536 places, 664 transitions, 8926 flow [2024-06-03 20:51:02,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8792, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8926, PETRI_PLACES=536, PETRI_TRANSITIONS=664} [2024-06-03 20:51:02,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 493 predicate places. [2024-06-03 20:51:02,535 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 664 transitions, 8926 flow [2024-06-03 20:51:02,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:51:02,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:02,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:02,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-03 20:51:02,535 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:02,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:02,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1268121247, now seen corresponding path program 4 times [2024-06-03 20:51:02,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:02,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545087646] [2024-06-03 20:51:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:02,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:02,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:02,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545087646] [2024-06-03 20:51:02,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545087646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:02,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:02,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:02,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538647258] [2024-06-03 20:51:02,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:02,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:02,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:02,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:02,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 664 transitions, 8926 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:02,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:02,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:02,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:04,858 INFO L124 PetriNetUnfolderBase]: 4626/7914 cut-off events. [2024-06-03 20:51:04,858 INFO L125 PetriNetUnfolderBase]: For 1395206/1395206 co-relation queries the response was YES. [2024-06-03 20:51:04,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61943 conditions, 7914 events. 4626/7914 cut-off events. For 1395206/1395206 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 57776 event pairs, 1146 based on Foata normal form. 6/7911 useless extension candidates. Maximal degree in co-relation 61725. Up to 6791 conditions per place. [2024-06-03 20:51:04,986 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 588 selfloop transitions, 95 changer transitions 0/690 dead transitions. [2024-06-03 20:51:04,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 690 transitions, 10656 flow [2024-06-03 20:51:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:51:04,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 20:51:04,987 INFO L175 Difference]: Start difference. First operand has 536 places, 664 transitions, 8926 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:51:04,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 690 transitions, 10656 flow [2024-06-03 20:51:16,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 690 transitions, 10501 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:16,024 INFO L231 Difference]: Finished difference. Result has 536 places, 664 transitions, 8965 flow [2024-06-03 20:51:16,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8771, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8965, PETRI_PLACES=536, PETRI_TRANSITIONS=664} [2024-06-03 20:51:16,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 493 predicate places. [2024-06-03 20:51:16,024 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 664 transitions, 8965 flow [2024-06-03 20:51:16,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:16,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:16,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:16,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-03 20:51:16,025 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:16,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1160873231, now seen corresponding path program 6 times [2024-06-03 20:51:16,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:16,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084697075] [2024-06-03 20:51:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:16,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:16,261 INFO 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 20:51:16,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:16,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084697075] [2024-06-03 20:51:16,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084697075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:16,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:16,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547993063] [2024-06-03 20:51:16,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:16,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:16,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:16,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:16,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:16,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 664 transitions, 8965 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:16,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:16,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:16,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:18,824 INFO L124 PetriNetUnfolderBase]: 4654/8003 cut-off events. [2024-06-03 20:51:18,824 INFO L125 PetriNetUnfolderBase]: For 1435144/1435144 co-relation queries the response was YES. [2024-06-03 20:51:18,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62616 conditions, 8003 events. 4654/8003 cut-off events. For 1435144/1435144 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 58654 event pairs, 1158 based on Foata normal form. 8/8004 useless extension candidates. Maximal degree in co-relation 62397. Up to 6726 conditions per place. [2024-06-03 20:51:18,950 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 635 selfloop transitions, 68 changer transitions 0/710 dead transitions. [2024-06-03 20:51:18,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 710 transitions, 10859 flow [2024-06-03 20:51:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-03 20:51:18,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-03 20:51:18,951 INFO L175 Difference]: Start difference. First operand has 536 places, 664 transitions, 8965 flow. Second operand 9 states and 226 transitions. [2024-06-03 20:51:18,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 710 transitions, 10859 flow [2024-06-03 20:51:28,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 710 transitions, 10692 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:28,919 INFO L231 Difference]: Finished difference. Result has 539 places, 665 transitions, 8974 flow [2024-06-03 20:51:28,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8798, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8974, PETRI_PLACES=539, PETRI_TRANSITIONS=665} [2024-06-03 20:51:28,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-03 20:51:28,920 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 665 transitions, 8974 flow [2024-06-03 20:51:28,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:28,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:28,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:28,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-03 20:51:28,921 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:28,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2078849421, now seen corresponding path program 7 times [2024-06-03 20:51:28,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:28,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28772447] [2024-06-03 20:51:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:28,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:29,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28772447] [2024-06-03 20:51:29,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28772447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:29,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:29,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:29,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758946424] [2024-06-03 20:51:29,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:29,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:29,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:29,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 665 transitions, 8974 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:51:29,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:29,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:29,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:31,422 INFO L124 PetriNetUnfolderBase]: 4682/8051 cut-off events. [2024-06-03 20:51:31,422 INFO L125 PetriNetUnfolderBase]: For 1456462/1456462 co-relation queries the response was YES. [2024-06-03 20:51:31,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63129 conditions, 8051 events. 4682/8051 cut-off events. For 1456462/1456462 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 59056 event pairs, 1180 based on Foata normal form. 8/8052 useless extension candidates. Maximal degree in co-relation 62909. Up to 7100 conditions per place. [2024-06-03 20:51:31,550 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 593 selfloop transitions, 94 changer transitions 0/694 dead transitions. [2024-06-03 20:51:31,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 694 transitions, 10488 flow [2024-06-03 20:51:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:31,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:51:31,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:51:31,551 INFO L175 Difference]: Start difference. First operand has 539 places, 665 transitions, 8974 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:51:31,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 694 transitions, 10488 flow [2024-06-03 20:51:41,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 694 transitions, 10228 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:41,713 INFO L231 Difference]: Finished difference. Result has 539 places, 666 transitions, 8950 flow [2024-06-03 20:51:41,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8724, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8950, PETRI_PLACES=539, PETRI_TRANSITIONS=666} [2024-06-03 20:51:41,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-03 20:51:41,713 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 666 transitions, 8950 flow [2024-06-03 20:51:41,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:51:41,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:41,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:41,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-03 20:51:41,714 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:41,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:41,714 INFO L85 PathProgramCache]: Analyzing trace with hash 229253965, now seen corresponding path program 8 times [2024-06-03 20:51:41,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:41,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023133096] [2024-06-03 20:51:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:42,018 INFO 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 20:51:42,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:42,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023133096] [2024-06-03 20:51:42,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023133096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:42,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:42,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:42,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456745429] [2024-06-03 20:51:42,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:42,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:42,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:42,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:42,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 666 transitions, 8950 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:51:42,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:42,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:42,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:44,234 INFO L124 PetriNetUnfolderBase]: 4756/8165 cut-off events. [2024-06-03 20:51:44,234 INFO L125 PetriNetUnfolderBase]: For 1530102/1530102 co-relation queries the response was YES. [2024-06-03 20:51:44,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64964 conditions, 8165 events. 4756/8165 cut-off events. For 1530102/1530102 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59956 event pairs, 1190 based on Foata normal form. 6/8164 useless extension candidates. Maximal degree in co-relation 64743. Up to 7211 conditions per place. [2024-06-03 20:51:44,365 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 623 selfloop transitions, 70 changer transitions 0/700 dead transitions. [2024-06-03 20:51:44,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 700 transitions, 10823 flow [2024-06-03 20:51:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 20:51:44,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-03 20:51:44,367 INFO L175 Difference]: Start difference. First operand has 539 places, 666 transitions, 8950 flow. Second operand 9 states and 212 transitions. [2024-06-03 20:51:44,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 700 transitions, 10823 flow [2024-06-03 20:51:54,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 700 transitions, 10620 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:54,233 INFO L231 Difference]: Finished difference. Result has 542 places, 670 transitions, 9009 flow [2024-06-03 20:51:54,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8749, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9009, PETRI_PLACES=542, PETRI_TRANSITIONS=670} [2024-06-03 20:51:54,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 499 predicate places. [2024-06-03 20:51:54,233 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 670 transitions, 9009 flow [2024-06-03 20:51:54,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:51:54,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:54,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:54,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-03 20:51:54,234 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:54,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:54,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2100826705, now seen corresponding path program 9 times [2024-06-03 20:51:54,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:54,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432503848] [2024-06-03 20:51:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:54,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:54,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:54,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432503848] [2024-06-03 20:51:54,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432503848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:54,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:54,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:54,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198936096] [2024-06-03 20:51:54,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:54,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:54,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:54,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:54,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:54,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:54,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 670 transitions, 9009 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:51:54,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:54,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:54,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:56,777 INFO L124 PetriNetUnfolderBase]: 4738/8143 cut-off events. [2024-06-03 20:51:56,778 INFO L125 PetriNetUnfolderBase]: For 1476660/1476660 co-relation queries the response was YES. [2024-06-03 20:51:56,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63649 conditions, 8143 events. 4738/8143 cut-off events. For 1476660/1476660 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59843 event pairs, 1190 based on Foata normal form. 8/8144 useless extension candidates. Maximal degree in co-relation 63427. Up to 7233 conditions per place. [2024-06-03 20:51:56,903 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 621 selfloop transitions, 67 changer transitions 0/695 dead transitions. [2024-06-03 20:51:56,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 695 transitions, 10479 flow [2024-06-03 20:51:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:51:56,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-03 20:51:56,904 INFO L175 Difference]: Start difference. First operand has 542 places, 670 transitions, 9009 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:51:56,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 695 transitions, 10479 flow [2024-06-03 20:52:08,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 695 transitions, 10308 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:08,258 INFO L231 Difference]: Finished difference. Result has 544 places, 670 transitions, 8980 flow [2024-06-03 20:52:08,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8838, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8980, PETRI_PLACES=544, PETRI_TRANSITIONS=670} [2024-06-03 20:52:08,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 501 predicate places. [2024-06-03 20:52:08,258 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 670 transitions, 8980 flow [2024-06-03 20:52:08,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:52:08,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:08,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:08,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-03 20:52:08,259 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:08,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1002423967, now seen corresponding path program 5 times [2024-06-03 20:52:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:08,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304727573] [2024-06-03 20:52:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:08,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:08,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:08,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304727573] [2024-06-03 20:52:08,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304727573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:08,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:08,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:08,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566460813] [2024-06-03 20:52:08,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:08,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:08,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:08,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:08,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:08,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:08,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 670 transitions, 8980 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:08,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:08,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:08,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:10,779 INFO L124 PetriNetUnfolderBase]: 4804/8233 cut-off events. [2024-06-03 20:52:10,780 INFO L125 PetriNetUnfolderBase]: For 1554137/1554137 co-relation queries the response was YES. [2024-06-03 20:52:10,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65480 conditions, 8233 events. 4804/8233 cut-off events. For 1554137/1554137 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 60537 event pairs, 1205 based on Foata normal form. 6/8230 useless extension candidates. Maximal degree in co-relation 65257. Up to 7193 conditions per place. [2024-06-03 20:52:10,906 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 601 selfloop transitions, 86 changer transitions 0/694 dead transitions. [2024-06-03 20:52:10,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 694 transitions, 10782 flow [2024-06-03 20:52:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:52:10,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 20:52:10,907 INFO L175 Difference]: Start difference. First operand has 544 places, 670 transitions, 8980 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:52:10,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 694 transitions, 10782 flow [2024-06-03 20:52:22,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 694 transitions, 10654 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:22,385 INFO L231 Difference]: Finished difference. Result has 545 places, 672 transitions, 9096 flow [2024-06-03 20:52:22,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8852, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9096, PETRI_PLACES=545, PETRI_TRANSITIONS=672} [2024-06-03 20:52:22,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 502 predicate places. [2024-06-03 20:52:22,386 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 672 transitions, 9096 flow [2024-06-03 20:52:22,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:22,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:22,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:22,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-03 20:52:22,386 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:22,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash -125339611, now seen corresponding path program 6 times [2024-06-03 20:52:22,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:22,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845268371] [2024-06-03 20:52:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:22,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:22,631 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 20:52:22,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:22,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845268371] [2024-06-03 20:52:22,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845268371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:22,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:22,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:22,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216379741] [2024-06-03 20:52:22,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:22,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:22,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:22,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:22,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 672 transitions, 9096 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:22,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:22,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:22,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:24,718 INFO L124 PetriNetUnfolderBase]: 4786/8207 cut-off events. [2024-06-03 20:52:24,719 INFO L125 PetriNetUnfolderBase]: For 1523102/1523102 co-relation queries the response was YES. [2024-06-03 20:52:24,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64488 conditions, 8207 events. 4786/8207 cut-off events. For 1523102/1523102 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 60372 event pairs, 1215 based on Foata normal form. 8/8206 useless extension candidates. Maximal degree in co-relation 64264. Up to 7229 conditions per place. [2024-06-03 20:52:24,849 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 597 selfloop transitions, 86 changer transitions 0/690 dead transitions. [2024-06-03 20:52:24,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 690 transitions, 10534 flow [2024-06-03 20:52:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:52:25,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-03 20:52:25,042 INFO L175 Difference]: Start difference. First operand has 545 places, 672 transitions, 9096 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:52:25,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 690 transitions, 10534 flow [2024-06-03 20:52:35,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 690 transitions, 10413 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:35,783 INFO L231 Difference]: Finished difference. Result has 549 places, 672 transitions, 9156 flow [2024-06-03 20:52:35,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8975, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9156, PETRI_PLACES=549, PETRI_TRANSITIONS=672} [2024-06-03 20:52:35,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 506 predicate places. [2024-06-03 20:52:35,783 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 672 transitions, 9156 flow [2024-06-03 20:52:35,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:35,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:35,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:35,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-03 20:52:35,784 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:35,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1477576577, now seen corresponding path program 10 times [2024-06-03 20:52:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:35,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471594663] [2024-06-03 20:52:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:36,042 INFO 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 20:52:36,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:36,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471594663] [2024-06-03 20:52:36,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471594663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:36,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:36,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:36,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95523888] [2024-06-03 20:52:36,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:36,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:36,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:36,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:36,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:36,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:36,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 672 transitions, 9156 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:36,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:36,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:36,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:38,228 INFO L124 PetriNetUnfolderBase]: 4814/8273 cut-off events. [2024-06-03 20:52:38,228 INFO L125 PetriNetUnfolderBase]: For 1543250/1543250 co-relation queries the response was YES. [2024-06-03 20:52:38,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65115 conditions, 8273 events. 4814/8273 cut-off events. For 1543250/1543250 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 60950 event pairs, 1198 based on Foata normal form. 8/8276 useless extension candidates. Maximal degree in co-relation 64889. Up to 7380 conditions per place. [2024-06-03 20:52:38,363 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 645 selfloop transitions, 56 changer transitions 0/708 dead transitions. [2024-06-03 20:52:38,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 708 transitions, 10708 flow [2024-06-03 20:52:38,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:52:38,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:52:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 266 transitions. [2024-06-03 20:52:38,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-03 20:52:38,364 INFO L175 Difference]: Start difference. First operand has 549 places, 672 transitions, 9156 flow. Second operand 12 states and 266 transitions. [2024-06-03 20:52:38,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 708 transitions, 10708 flow [2024-06-03 20:52:48,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 708 transitions, 10537 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:48,561 INFO L231 Difference]: Finished difference. Result has 556 places, 673 transitions, 9136 flow [2024-06-03 20:52:48,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8985, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9136, PETRI_PLACES=556, PETRI_TRANSITIONS=673} [2024-06-03 20:52:48,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 513 predicate places. [2024-06-03 20:52:48,562 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 673 transitions, 9136 flow [2024-06-03 20:52:48,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:48,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:48,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:48,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-03 20:52:48,563 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:48,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:48,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1628676263, now seen corresponding path program 11 times [2024-06-03 20:52:48,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:48,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978394423] [2024-06-03 20:52:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:48,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:48,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978394423] [2024-06-03 20:52:48,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978394423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:48,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:48,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:48,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410913258] [2024-06-03 20:52:48,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:48,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:48,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:48,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:48,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:48,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 673 transitions, 9136 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:52:48,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:48,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:48,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:51,083 INFO L124 PetriNetUnfolderBase]: 4937/8456 cut-off events. [2024-06-03 20:52:51,083 INFO L125 PetriNetUnfolderBase]: For 1682378/1682378 co-relation queries the response was YES. [2024-06-03 20:52:51,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68677 conditions, 8456 events. 4937/8456 cut-off events. For 1682378/1682378 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 62345 event pairs, 1211 based on Foata normal form. 6/8447 useless extension candidates. Maximal degree in co-relation 68450. Up to 7330 conditions per place. [2024-06-03 20:52:51,219 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 617 selfloop transitions, 91 changer transitions 0/715 dead transitions. [2024-06-03 20:52:51,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 715 transitions, 11159 flow [2024-06-03 20:52:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:52:51,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:52:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-03 20:52:51,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2024-06-03 20:52:51,220 INFO L175 Difference]: Start difference. First operand has 556 places, 673 transitions, 9136 flow. Second operand 11 states and 250 transitions. [2024-06-03 20:52:51,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 715 transitions, 11159 flow [2024-06-03 20:53:01,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 715 transitions, 11032 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-03 20:53:01,089 INFO L231 Difference]: Finished difference. Result has 559 places, 681 transitions, 9420 flow [2024-06-03 20:53:01,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9009, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9420, PETRI_PLACES=559, PETRI_TRANSITIONS=681} [2024-06-03 20:53:01,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 516 predicate places. [2024-06-03 20:53:01,090 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 681 transitions, 9420 flow [2024-06-03 20:53:01,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 20:53:01,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:01,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:01,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-03 20:53:01,091 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:01,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:01,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1628676449, now seen corresponding path program 7 times [2024-06-03 20:53:01,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:01,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244192240] [2024-06-03 20:53:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:01,375 INFO 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 20:53:01,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:01,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244192240] [2024-06-03 20:53:01,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244192240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:01,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:01,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:53:01,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002657417] [2024-06-03 20:53:01,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:01,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:53:01,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:53:01,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:53:01,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:01,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 681 transitions, 9420 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:01,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:01,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:01,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:03,700 INFO L124 PetriNetUnfolderBase]: 4957/8463 cut-off events. [2024-06-03 20:53:03,701 INFO L125 PetriNetUnfolderBase]: For 1708102/1708102 co-relation queries the response was YES. [2024-06-03 20:53:03,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69355 conditions, 8463 events. 4957/8463 cut-off events. For 1708102/1708102 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 62148 event pairs, 809 based on Foata normal form. 6/8460 useless extension candidates. Maximal degree in co-relation 69125. Up to 6729 conditions per place. [2024-06-03 20:53:03,837 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 577 selfloop transitions, 131 changer transitions 0/715 dead transitions. [2024-06-03 20:53:03,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 715 transitions, 11569 flow [2024-06-03 20:53:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 20:53:03,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:53:03,839 INFO L175 Difference]: Start difference. First operand has 559 places, 681 transitions, 9420 flow. Second operand 7 states and 182 transitions. [2024-06-03 20:53:03,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 715 transitions, 11569 flow [2024-06-03 20:53:15,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 715 transitions, 11396 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 20:53:15,505 INFO L231 Difference]: Finished difference. Result has 560 places, 682 transitions, 9549 flow [2024-06-03 20:53:15,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9247, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9549, PETRI_PLACES=560, PETRI_TRANSITIONS=682} [2024-06-03 20:53:15,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 517 predicate places. [2024-06-03 20:53:15,506 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 682 transitions, 9549 flow [2024-06-03 20:53:15,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:15,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:15,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:15,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-03 20:53:15,507 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:15,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:15,507 INFO L85 PathProgramCache]: Analyzing trace with hash 470747233, now seen corresponding path program 8 times [2024-06-03 20:53:15,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:15,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829211230] [2024-06-03 20:53:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:15,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:15,759 INFO 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 20:53:15,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:15,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829211230] [2024-06-03 20:53:15,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829211230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:15,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:15,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:15,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533387939] [2024-06-03 20:53:15,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:15,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:15,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:15,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:15,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:15,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:15,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 682 transitions, 9549 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:15,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:15,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:15,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:18,196 INFO L124 PetriNetUnfolderBase]: 5005/8570 cut-off events. [2024-06-03 20:53:18,196 INFO L125 PetriNetUnfolderBase]: For 1795055/1795055 co-relation queries the response was YES. [2024-06-03 20:53:18,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71010 conditions, 8570 events. 5005/8570 cut-off events. For 1795055/1795055 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 63312 event pairs, 1155 based on Foata normal form. 8/8569 useless extension candidates. Maximal degree in co-relation 70779. Up to 7388 conditions per place. [2024-06-03 20:53:18,330 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 588 selfloop transitions, 113 changer transitions 0/708 dead transitions. [2024-06-03 20:53:18,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 708 transitions, 11413 flow [2024-06-03 20:53:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:53:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:53:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:53:18,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:53:18,332 INFO L175 Difference]: Start difference. First operand has 560 places, 682 transitions, 9549 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:53:18,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 708 transitions, 11413 flow [2024-06-03 20:53:30,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 708 transitions, 11152 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:53:30,954 INFO L231 Difference]: Finished difference. Result has 563 places, 684 transitions, 9627 flow [2024-06-03 20:53:30,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9295, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9627, PETRI_PLACES=563, PETRI_TRANSITIONS=684} [2024-06-03 20:53:30,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 520 predicate places. [2024-06-03 20:53:30,954 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 684 transitions, 9627 flow [2024-06-03 20:53:30,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:30,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:30,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:30,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-03 20:53:30,955 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:30,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:30,955 INFO L85 PathProgramCache]: Analyzing trace with hash 152290835, now seen corresponding path program 9 times [2024-06-03 20:53:30,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:30,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655365895] [2024-06-03 20:53:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:30,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:31,200 INFO 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 20:53:31,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:31,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655365895] [2024-06-03 20:53:31,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655365895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:31,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:31,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428744872] [2024-06-03 20:53:31,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:31,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:31,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:31,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:31,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 684 transitions, 9627 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:31,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:31,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:31,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:33,428 INFO L124 PetriNetUnfolderBase]: 4992/8522 cut-off events. [2024-06-03 20:53:33,428 INFO L125 PetriNetUnfolderBase]: For 1691699/1691699 co-relation queries the response was YES. [2024-06-03 20:53:33,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69709 conditions, 8522 events. 4992/8522 cut-off events. For 1691699/1691699 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 62661 event pairs, 844 based on Foata normal form. 6/8519 useless extension candidates. Maximal degree in co-relation 69478. Up to 6751 conditions per place. [2024-06-03 20:53:33,760 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 574 selfloop transitions, 132 changer transitions 0/713 dead transitions. [2024-06-03 20:53:33,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 713 transitions, 11715 flow [2024-06-03 20:53:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 20:53:33,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:53:33,761 INFO L175 Difference]: Start difference. First operand has 563 places, 684 transitions, 9627 flow. Second operand 7 states and 175 transitions. [2024-06-03 20:53:33,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 713 transitions, 11715 flow [2024-06-03 20:53:46,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 713 transitions, 11425 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:53:46,135 INFO L231 Difference]: Finished difference. Result has 564 places, 684 transitions, 9607 flow [2024-06-03 20:53:46,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9337, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9607, PETRI_PLACES=564, PETRI_TRANSITIONS=684} [2024-06-03 20:53:46,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 521 predicate places. [2024-06-03 20:53:46,135 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 684 transitions, 9607 flow [2024-06-03 20:53:46,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:46,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:46,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:46,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-03 20:53:46,136 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:46,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:46,136 INFO L85 PathProgramCache]: Analyzing trace with hash 473604193, now seen corresponding path program 10 times [2024-06-03 20:53:46,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:46,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544902877] [2024-06-03 20:53:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:46,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:46,382 INFO 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 20:53:46,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:46,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544902877] [2024-06-03 20:53:46,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544902877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:46,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:46,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:46,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132260497] [2024-06-03 20:53:46,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:46,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:46,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:46,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:46,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:46,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:46,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 684 transitions, 9607 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:46,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:46,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:46,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:48,786 INFO L124 PetriNetUnfolderBase]: 5020/8587 cut-off events. [2024-06-03 20:53:48,786 INFO L125 PetriNetUnfolderBase]: For 1734426/1734426 co-relation queries the response was YES. [2024-06-03 20:53:48,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70322 conditions, 8587 events. 5020/8587 cut-off events. For 1734426/1734426 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 63453 event pairs, 1280 based on Foata normal form. 8/8586 useless extension candidates. Maximal degree in co-relation 70090. Up to 7595 conditions per place. [2024-06-03 20:53:48,921 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 599 selfloop transitions, 98 changer transitions 0/704 dead transitions. [2024-06-03 20:53:48,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 704 transitions, 11111 flow [2024-06-03 20:53:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:53:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:53:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:53:48,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:53:48,923 INFO L175 Difference]: Start difference. First operand has 564 places, 684 transitions, 9607 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:53:48,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 704 transitions, 11111 flow [2024-06-03 20:54:02,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 704 transitions, 10792 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:54:02,110 INFO L231 Difference]: Finished difference. Result has 565 places, 685 transitions, 9531 flow [2024-06-03 20:54:02,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9291, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9531, PETRI_PLACES=565, PETRI_TRANSITIONS=685} [2024-06-03 20:54:02,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 522 predicate places. [2024-06-03 20:54:02,110 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 685 transitions, 9531 flow [2024-06-03 20:54:02,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:02,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:02,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:02,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-03 20:54:02,111 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:02,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:02,111 INFO L85 PathProgramCache]: Analyzing trace with hash 245703043, now seen corresponding path program 11 times [2024-06-03 20:54:02,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:02,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730932075] [2024-06-03 20:54:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:02,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:02,357 INFO 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 20:54:02,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:02,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730932075] [2024-06-03 20:54:02,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730932075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:02,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:02,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:02,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112472081] [2024-06-03 20:54:02,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:02,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:02,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:02,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:02,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:02,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:02,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 685 transitions, 9531 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:02,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:02,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:02,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:04,741 INFO L124 PetriNetUnfolderBase]: 5002/8555 cut-off events. [2024-06-03 20:54:04,741 INFO L125 PetriNetUnfolderBase]: For 1654914/1654914 co-relation queries the response was YES. [2024-06-03 20:54:04,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68399 conditions, 8555 events. 5002/8555 cut-off events. For 1654914/1654914 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 63217 event pairs, 1269 based on Foata normal form. 8/8554 useless extension candidates. Maximal degree in co-relation 68168. Up to 7525 conditions per place. [2024-06-03 20:54:04,875 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 601 selfloop transitions, 94 changer transitions 0/702 dead transitions. [2024-06-03 20:54:04,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 702 transitions, 10991 flow [2024-06-03 20:54:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:54:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:54:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:54:04,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:54:04,877 INFO L175 Difference]: Start difference. First operand has 565 places, 685 transitions, 9531 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:54:04,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 702 transitions, 10991 flow [2024-06-03 20:54:17,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 702 transitions, 10774 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:17,576 INFO L231 Difference]: Finished difference. Result has 565 places, 685 transitions, 9518 flow [2024-06-03 20:54:17,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9314, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9518, PETRI_PLACES=565, PETRI_TRANSITIONS=685} [2024-06-03 20:54:17,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 522 predicate places. [2024-06-03 20:54:17,577 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 685 transitions, 9518 flow [2024-06-03 20:54:17,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:17,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:17,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:17,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-03 20:54:17,578 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:17,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:17,578 INFO L85 PathProgramCache]: Analyzing trace with hash 245376613, now seen corresponding path program 12 times [2024-06-03 20:54:17,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:17,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858978982] [2024-06-03 20:54:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:17,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:17,815 INFO 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 20:54:17,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:17,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858978982] [2024-06-03 20:54:17,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858978982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:17,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:17,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:17,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491551248] [2024-06-03 20:54:17,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:17,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:17,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:17,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:17,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 685 transitions, 9518 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:17,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:17,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:17,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15